OMRON NX-ID / IA / OD / OC / MDAutomation Systems/ Machine Automation Controllers/NX-series I/O System

OMRON NX-ID / IA / OD / OC / MD Automation Systems

NX-ID / IA / OD / OC / MD NX-series Digital I/O Unit/Dimensions
NX-ID / IA / OD / OC / MD NX-series Digital I/O Unit/Catalog
NX-ID / IA / OD / OC / MD NX-series Digital I/O Unit/Lineup
NX-ID / IA / OD / OC / MD NX-series Digital I/O Unit/Specifications
Purchase the OMRON NX-ID / IA / OD / OC / MD NX-series I/O System

OMRON NX-ID / IA / OD / OC / MD Dimensions

/Images/l_3185-25-171119-198x198.jpg

last update: March 1, 2017

• High-speed I/O refreshing using the EtherCAT coupler

• I/O refreshing synchronized with the control cycle of the controller (synchronous refreshing)

• Time-stamp inputs and outputs anywhere in the EtherCAT network can be independently controlled with sub-microsecond accuracy

• Detachable terminals for easy maintenance

• Screwless Push-In Plus terminal block or MIL/Fujitsu connector speeds up installation

• Compact with a width of 12 mm per unit (connector type: 30 mm)

• 4, 8, 16 or 32 inputs for flexible I/O configuration (NX-ID/IA)

• 2, 4, 8, 16 or 32 outputs for flexible I/O configuration (NX-OD/OC)

• Connect to the CJ PLC using the EtherNet/IP^TM bus coupler

Sysmac is a trademark or registered trademark of OMRON Corporation in Japan and other countries for OMRON factory automation products.
EtherCAT® is a registered trademark and patented technology, licensed by Beckhoff Automation GmbH, Germany.
EtherNet/IP™ is a trademark of ODVA.
Other company names and product names in this document are the trademarks or registered trademarks of their respective companies.

last update: March 1, 2017

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OMRON NX-ID / IA / OD / OC / MD dimension
NX-ID / IA / OD / OC / MD NX-series Digital I/O Unit/Dimensions
last update: January 22, 2018

(Unit: mm)

Screwless Clamping Terminal Block Type
12 mm Width

* The dimension is 1.35 mm for Units with lot numbers through December 2014.

24 mm Width

M3 Screw Terminal Block Type
30 mm Width

MIL Connector Type (1 Connector with 20 terminals)
30 mm Width

MIL Connector Type (1 Connector with 40 terminals)
30 mm Width

MIL Connector Type (2 Connectors with 20 terminals)
30 mm Width

Fujitsu Connector Type (1 Connector with 40 terminals)
30 mm Width

Fujitsu Connector Type (2 Connectors with 24 terminals)
30 mm Width

last update: January 22, 2018

OMRON NX-ID / IA / OD / OC / MD catalog
NX-ID / IA / OD / OC / MD NX-series Digital I/O Unit/Catalog

Catalog

Manual

CAD

English
Global Edition

For ordering in Singapore, please note some product models not sold in Singapore may be included in the following catalog(s) for our global customers.
*It is recommended to select “Save” from the right-click due to large size of catalog PDF data.

Catalog Name Catalog Number
[size] Last Update

NX-ID/IA/OD/OC/MD Data Sheet -
[11436KB] Aug 01, 201820180801 NX-ID/IA/OD/OC/MD Data Sheet

NX-series I/O System Catalog R183-E1-09
[6683KB] Nov 01, 201820181101 NX-series I/O System Catalog

XW2R Series Catalog G077-E1-03
[21666KB] Apr 02, 201820180402 XW2R Series Catalog

XW2Z-R Data Sheet G126-E1-02
[2435KB] Apr 03, 201720170403 XW2Z-R Data Sheet

G70[]/G7TC Table of I/O Relay Terminal and connectable device combinations J217-E1-02
[1206KB] Jun 01, 201820180601 G70[]/G7TC Table of I/O Relay Terminal and connectable device combinations

XW2 Series Table of Connector-Terminal Block Conversion Units and connectable device combinations G129-E1-02
[950KB] Jun 01, 201820180601 XW2 Series Table of Connector-Terminal Block Conversion Units and connectable device combinations

OMRON NX-ID / IA / OD / OC / MD lineup
NX-ID / IA / OD / OC / MD NX-series Digital I/O Unit/Lineup
last update: August 1, 2018
Model Number Structure

Ordering Information
Applicable standards

Ask your OMRON representative for the most recent applicable standards for each model.

Digital Input Units

Product Name Specification Model
Number
of points Internal
I/O
common Rated
input
voltage I/O refreshing method ON/OFF
response
time
DC Input Unit

(Screwless Clamping
Terminal Block,
12 mm Width) 4 points NPN 12 to
24 VDC Switching Synchronous I/O
refreshing and Free-Run
refreshing 20 μs max./
400 μs max. NX-ID3317
24 VDC 100 ns max./
100 ns max. NX-ID3343
Input refreshing with input
changed time only *1 NX-ID3344
PNP 12 to
24 VDC Switching Synchronous I/O
refreshing and Free-Run
refreshing 20 μs max./
400 μs max. NX-ID3417
24 VDC Input refreshing with input
changed time only *1 100 ns max./
100 ns max. NX-ID3443
NX-ID3444
8 points NPN Switching Synchronous I/O
refreshing and Free-Run
refreshing 20 μs max./
400 μs max. NX-ID4342
PNP NX-ID4442
16 points NPN NX-ID5342
PNP NX-ID5442
DC Input Unit

(M3 Screw Terminal
Block, 30 mm Width) 16 points For both
NPN/PNP 24 VDC Switching Synchronous I/O
refreshing and Free-Run
refreshing 20 μs max./
400 μs max. NX-ID5142-1
DC Input Unit

(MIL Connector,
30 mm Width) 16 points For both
NPN/PNP 24 VDC Switching Synchronous I/O
refreshing and Free-Run
refreshing 20 μs max./
400 μs max. NX-ID5142-5
32 points NX-ID6142-5
DC Input Unit

(Fujitsu Connector,
30 mm Width) 32 points For both
NPN/PNP 24 VDC Switching Synchronous I/O
refreshing and Free-Run
refreshing 20 μs max./
400 μs max. NX-ID6142-6
AC Input Unit

(Screwless Clamping
Terminal Block,
12 mm Width) 4 points 200 to 240 VAC,
50/60 Hz
(170 to 264 VAC,
±3 Hz) Free-Run refreshing 10 ms max./
40 ms max. NX-IA3117

*1. To use input refreshing with input changed time, the EtherCAT Coupler Unit with unit version 1.1 or later and the
Sysmac Studio version 1.07 or higher are required.

Digital Output Units

Product
Name Specification Model
Number
of
points Internal
I/O
common Maximum
value of load
current Rated
voltage I/O
refreshing
method ON/OFF
response
time
Transistor
Output Unit

(Screwless
Clamping
Terminal Block,
12 mm Width) 2 NPN 0.5 A/point,
1 A/Unit 24 VDC Output
refreshing with
specified time
stamp only *1 300 ns max./
300 ns max. NX-OD2154
PNP NX-OD2258
4 NPN 0.5 A/point,
2 A/Unit 12 to
24 VDC Switching
Synchronous
I/O refreshing
and Free-Run
refreshing 0.1 ms max./
0.8 ms max. NX-OD3121
24 VDC 300 ns max./
300 ns max. NX-OD3153
PNP 0.5 ms max./
1.0 ms max. NX-OD3256
300 ns max./
300 ns max. NX-OD3257
2 A/point,
8 A/Unit 0.5 ms max./
1.0 ms max. NX-OD3268
8 NPN 0.5 A/point,
4 A/Unit 12 to
24 VDC 0.1 ms max./
0.8 ms max. NX-OD4121
PNP 24 VDC 0.5 ms max./
1.0 ms max. NX-OD4256
16 NPN 12 to
24 VDC 0.1 ms max./
0.8 ms max. NX-OD5121
PNP 24 VDC 0.5 ms max./
1.0 ms max. NX-OD5256
Transistor
Output Unit

(M3 Screw
Terminal Block,
30 mm Width) 16 NPN 0.5 A/point,
5 A/Unit 12 to
24 VDC Switching
Synchronous
I/O refreshing
and Free-Run
refreshing 0.1 ms max./
0.8 ms max. NX-OD5121-1
PNP 24 VDC 0.5 ms max./
1.0 ms max. NX-OD5256-1
Transistor
Output Unit

(MIL Connector,
30 mm Width) 16 NPN 0.5 A/point,
2 A/Unit 12 to
24 VDC Switching
Synchronous
I/O refreshing
and Free-Run
refreshing 0.1 ms max./
0.8 ms max. NX-OD5121-5
PNP 24 VDC 0.5 ms max./
1.0 ms max. NX-OD5256-5
32 NPN 0.5 A/point,
2 A/common,
4 A/Unit 12 to
24 VDC 0.1 ms max./
0.8 ms max. NX-OD6121-5
PNP 24 VDC 0.5 ms max./
1.0 ms max. NX-OD6256-5
Transistor
Output Unit

(Fujitsu
Connector,
30 mm Width) 32 NPN 0.5 A/point,
2 A/common,
4 A/Unit 12 to
24 VDC Switching
Synchronous
I/O refreshing
and Free-Run
refreshing 0.1 ms max./
0.8 ms max. NX-OD6121-6
Relay Output
Unit

(Screwless
Clamping
Terminal Block,
12 mm Width/
24 mm Width) 2 Relay type:
N.O. 250 VAC/2 A (cosφ=1),
250 VAC/2 A (cosφ=0.4),
24 VDC/2 A, 4 A/Unit Free-Run
refreshing 15 ms max./
15 ms max. NX-OC2633
Relay type:
N.O.+N.C. NX-OC2733
8 Relay type:
N.O. 250 VAC/2 A (cosφ=1),
250 VAC/2 A (cosφ=0.4),
24 VDC/2 A, 8 A/Unit Free-Run
refreshing 15ms max./
15ms max. NX-OC4633

*1. To use input refreshing with input changed time, the EtherCAT Coupler Unit with unit version 1.1 or later and the
Sysmac Studio version 1.07 or higher are required.

Digital Mixed I/O Units

Product
Name Specification Model
Number
of
points Internal I/O
common Maximum
value of load
current I/O
refreshing
method ON/OFF
response
time
DC Input/
Transistor
Output Unit

(MIL Connector,
30 mm Width) Outputs:
16 points
Inputs:
16 points Outputs: NPN
Inputs: For both
NPN/PNP Outputs:
12 to 24 VDC
Inputs: 24 VDCV Switching
Synchronous
I/O refreshing
and Free-Run
refreshing Outputs: 0.1 ms max./
0.8 ms max.
Inputs: 20 μs max./
400 μs max. NX-MD6121-5
Outputs: PNP
Inputs: For both
NPN/PNP Outputs:
24 VDC
Inputs: 24 VDC Outputs: 0.5 ms max./
1.0 ms max.
Inputs: 20 μs max./
400 μs max. NX-MD6256-5
Transistor
Output Unit

(Fujitsu
Connector,
30 mm Width) Outputs:
16
points
Inputs:
16
points Outputs: NPN
Inputs: For both
NPN/PNP Outputs:
12 to 24 VDC
Inputs: 24 VDC Switching
Synchronous
I/O refreshing
and Free-Run
refreshing Outputs: 0.1 ms max./
0.8 ms max.
Inputs: 20 μs max./
400 μs max. NX-MD6121-6

Optional Products

Product name Specification Model Standards
Unit/Terminal Block Coding Pins For 10 Units (Terminal Block: 30 pins, Unit: 30 pins) NX-AUX02 -

Product name Specification Model Standards
No. of
terminals Terminal number
indications Ground
terminal mark Terminal current
capacity
Terminal Block 8 A/B None 10 A NX-TBA082 ---
12 NX-TBA122
16 NX-TBA162

Accessories

Not included.

last update: August 1, 2018

OMRON NX-ID / IA / OD / OC / MD specification
NX-ID / IA / OD / OC / MD NX-series Digital I/O Unit/Specifications
last update: August 1, 2018
General Specifications

Item Specification
Enclosure Mounted in a panel
Grounding method Ground to 100 Ω or less
Operating
environment Ambient operating temperature 0 to 55°C
Ambient operating humidity 10% to 95% (with no condensation or icing)
Atmosphere Must be free from corrosive gases.
Ambient storage temperature -25 to 70°C (with no condensation or icing)
Altitude 2,000 m max.
Pollution degree 2 or less: Conforms to JIS B3502 and IEC 61131-2.
Noise immunity 2 kV on power supply line (Conforms to IEC61000-4-4.)
Overvoltage category Category II: Conforms to JIS B3502 and IEC 61131-2.
EMC immunity level Zone B
Vibration resistance *1 Conforms to IEC 60068-2-6.
5 to 8.4 Hz with 3.5-mm amplitude, 8.4 to 150 Hz, acceleration of
9.8 m/s², 100 min each in X, Y, and Z directions
(10 sweeps of 10 min each = 100 min total)
Shock resistance *1 Conforms to IEC 60068-2-27. 147 m/s², 3 times each in X, Y, and
Z directions
Applicable standards *2 cULus: Listed (UL508) or Listed (UL 61010-2-201), ANSI/ISA 12.12.01,
EU: EN 61131-2 or EN 61010-2-201, C-Tick or RCM, KC: KC Registration, NK, LR

*1. For the Relay Output Unit, refer to the Digital Input Unit Specifications.
*2. Consult your OMRON representative for the most recent applicable standards for each model.

Digital Input Unit Specifications
DC Input Unit (Screwless Clamping Terminal Block, 12 mm Width)
NX-ID3317

Unit name DC Input Unit Model NX-ID3317
Number of points 4 points External connection
terminals Screwless clamping terminal block (12
terminals)
I/O refreshing
method Selectable Synchronous I/O refreshing or Free-Run refreshing
Indicators TS indicator,
input indicator Internal I/O common NPN
Rated input voltage 12 to 24 VDC (9 to 28.8 VDC)
Input current 6 mA typical (at 24 VDC), rated current
ON voltage/ON current 9 VDC min./3 mA min. (between IOV
and each signal)
OFF voltage/OFF
current 2 VDC max./1 mA max. (between IOV
and each signal)
ON/OFF response
time 20 μs max./400 μs max.
Input filter time Without filter, 0.25 ms, 0.5 ms, 1 ms
(factory setting), 2 ms, 4 ms, 8 ms, 16
ms, 32 ms, 64 ms, 128 ms, 256 ms
Dimensions 12 (W) x 100 (H) x 71 (D) Isolation method Photocoupler isolation
Insulation
resistance 20 MΩ min. between isolated
circuits (at 100 VDC) Dielectric strength 510 VAC between isolated circuits for
1 minute at a leakage current of 5 mA
max.
I/O power supply
method Supply from the NX bus Current capacity of
I/O power supply
terminal IOV: 0.1 A/terminal max.,
IOG: 0.1 A/terminal max.
NX Unit power
consumption • Connected to a CPU Unit or
Communication Control Unit
0.90 W max.
• Connected to a Communi-
cations Coupler Unit
0.50 W max. Current
consumption from
I/O power supply No consumption
Weight 65 g max.
Circuit layout
Installation
orientation and
restrictions Installation orientation:
• Connected to a CPU Unit or Communication Control Unit: Possible in upright installation.
• Connected to a Communications Coupler Unit: Possible in 6 orientations.
Restrictions: No restrictions
Terminal
connection diagram
Disconnection/
Short-circuit
detection Not supported. Protective function Not supported.

NX-ID3343

Unit name DC Input Unit Model NX-ID3343
Number of points 4 points External connection
terminals Screwless clamping terminal block (12
terminals)
I/O refreshing
method Selectable Synchronous I/O refreshing or Free-Run refreshing
Indicators TS indicator,
input indicator Internal I/O common NPN
Rated input voltage 24 VDC (15 to 28.8 VDC)
Input current 3.5 mA typical (at 24 VDC), rated
current
ON voltage/ON current 15 VDC min./3 mA min. (between IOV
and each signal)
OFF voltage/OFF
current 5 VDC max./1 mA max. (between IOV
and each signal)
ON/OFF response
time 100 ns max./100 ns max.
Input filter time Without filter, 1 μs, 2 μs, 4 μs, 8 μs
(factory setting), 16 μs, 32 μs, 64 μs,
128 μs, 256 μs
Dimensions 12 (W) x 100 (H) x 71 (D) Isolation method Digital isolator isolation
Insulation
resistance 20 MΩ min. between isolated
circuits (at 100 VDC) Dielectric strength 510 VAC between isolated circuits for 1
minute at a leakage current of 5 mA
max.
I/O power supply
method Supply from the NX bus Current capacity of
I/O power supply
terminal IOV: 0.1 A/terminal max.,
IOG: 0.1 A/terminal max.
NX Unit power
consumption • Connected to a CPU Unit or
Communication Control Unit
0.90 W max.
• Connected to a Communi-
cations Coupler Unit
0.55 W max. Current
consumption from
I/O power supply 30 mA max.
Weight 65 g max.
Circuit layout
Installation
orientation and
restrictions Installation orientation:
• Connected to a CPU Unit or Communication Control Unit: Possible in upright installation.
• Connected to a Communications Coupler Unit: Possible in 6 orientations.
Restrictions: No restrictions
Terminal
connection diagram
Disconnection/
Short-circuit
detection Not supported. Protective function Not supported.

NX-ID3344

Unit name DC Input Unit Model NX-ID3344
Number of points 4 points External connection
terminals Screwless clamping terminal block (12
terminals)
I/O refreshing
method Input refreshing with input changed time
Indicators TS indicator,
input indicator Internal I/O common NPN
Rated input voltage 24 VDC (15 to 28.8 VDC)
Input current 3.5 mA typical (at 24 VDC), rated
current
ON voltage/ON current 15 VDC min./3 mA min. (between IOV
and each signal)
OFF voltage/OFF
current 5 VDC max./1 mA max. (between IOV
and each signal)
ON/OFF response
time 100 ns max./100 ns max.
Input filter time No filter *
Dimensions 12 (W) x 100 (H) x 71 (D) Isolation method Digital isolator isolation
Insulation
resistance 20 MΩ min. between isolated
circuits (at 100 VDC) Dielectric strength 510 VAC between isolated circuits for 1
minute at a leakage current of 5 mA
max.
I/O power supply
method Supply from the NX bus Current capacity of
I/O power supply
terminal IOV: 0.1 A/terminal max.,
IOG: 0.1 A/terminal max.
NX Unit power
consumption • Connected to a CPU Unit
0.90 W max.
• Connected to a Communi-
cations Coupler Unit
0.50 W max. Current
consumption from
I/O power supply 30 mA max.
Weight 65 g max.
Circuit layout
Installation
orientation and
restrictions Installation orientation:
• Connected to a CPU Unit: Possible in upright installation.
• Connected to a Communications Coupler Unit: Possible in 6 orientations.
Restrictions: No restrictions
Terminal
connection diagram
Disconnection/
Short-circuit
detection Not supported. Protective function Not supported.

* This model does not support the input filter. If the Unit is susceptible to noise, take countermeasures such as separating
or shielding the Unit and signal lines from the noise source. Refer to NX-series Digital I/O Unit User’s Manual (W521) for
information on countermeasures.

NX-ID3417

Unit name DC Input Unit Model NX-ID3417
Number of points 4 points External connection
terminals Screwless clamping terminal block (12
terminals)
I/O refreshing
method Selectable Synchronous I/O refreshing or Free-Run refreshing
Indicators TS indicator,
input indicator Internal I/O common PNP
Rated input voltage 12 to 24 VDC (9 to 28.8 VDC)
Input current 6 mA typical (at 24 VDC), rated current
ON voltage/ON current 9 VDC min./3 mA min. (between IOG
and each signal)
OFF voltage/OFF
current 2 VDC max./1 mA max. (between IOG
and each signal)
ON/OFF response
time 20 μs max./400 μs max.
Input filter time Without filter, 0.25 ms, 0.5 ms, 1 ms
(factory setting), 2 ms, 4 ms, 8 ms, 16
ms, 32 ms, 64 ms, 128 ms, 256 ms
Dimensions 12 (W) x 100 (H) x 71 (D) Isolation method Photocoupler isolation
Insulation
resistance 20 MΩ min. between isolated
circuits (at 100 VDC) Dielectric strength 510 VAC between isolated circuits for
1 minute at a leakage current of 5 mA
max.
I/O power supply
method Supply from the NX bus Current capacity of
I/O power supply
terminal IOV: 0.1 A/terminal max.,
IOG: 0.1 A/terminal max.
NX Unit power
consumption • Connected to a CPU Unit or
Communication Control Unit
0.90 W max.
• Connected to a Communi-
cations Coupler Unit
0.50 W max. Current
consumption from
I/O power supply No consumption
Weight 65 g max.
Circuit layout
Installation
orientation and
restrictions Installation orientation:
• Connected to a CPU Unit or Communication Control Unit: Possible in upright installation.
• Connected to a Communications Coupler Unit: Possible in 6 orientations.
Restrictions: No restrictions
Terminal
connection diagram
Disconnection/
Short-circuit
detection Not supported. Protective function Not supported.

NX-ID3443

Unit name DC Input Unit Model NX-ID3443
Number of points 4 points External connection
terminals Screwless clamping terminal block (12
terminals)
I/O refreshing
method Selectable Synchronous I/O refreshing or Free-Run refreshing
Indicators TS indicator,
input indicator Internal I/O common PNP
Rated input voltage 24 VDC (15 to 28.8 VDC)
Input current 3.5 mA typical (at 24 VDC), rated
current
ON voltage/ON current 15 VDC min./3 mA min. (between IOG
and each signal)
OFF voltage/OFF
current 5 VDC max./1 mA max. (between IOG
and each signal)
ON/OFF response
time 100 ns max./100 ns max.
Input filter time Without filter, 1 μs, 2 μs, 4 μs, 8 μs
(factory setting),16 μs, 32 μs, 64 μs,
128 μs, 256 μs
Dimensions 12 (W) x 100 (H) x 71 (D) Isolation method Digital isolator isolation
Insulation
resistance 20 MΩ min. between isolated
circuits (at 100 VDC) Dielectric strength 510 VAC between isolated circuits for
1 minute at a leakage current of 5 mA
max.
I/O power supply
method Supply from the NX bus Current capacity of
I/O power supply
terminal IOV: 0.1 A/terminal max.,
IOG: 0.1 A/terminal max.
NX Unit power
consumption • Connected to a CPU Unit or
Communication Control Unit
0.90 W max.
• Connected to a Communi-
cations Coupler Unit
0.55 W max. Current
consumption from
I/O power supply 30 mA max.
Weight 65 g max.
Circuit layout
Installation
orientation and
restrictions Installation orientation:
• Connected to a CPU Unit or Communication Control Unit: Possible in upright installation.
• Connected to a Communications Coupler Unit: Possible in 6 orientations.
Restrictions: No restrictions
Terminal
connection diagram
Disconnection/
Short-circuit
detection Not supported. Protective function Not supported.

NX-ID3444

Unit name DC Input Unit Model NX-ID3444
Number of points 4 points External connection
terminals Screwless clamping terminal block (12
terminals)
I/O refreshing
method Input refreshing with input changed time
Indicators TS indicator,
input indicator
Internal I/O common PNP
Rated input voltage 24 VDC (15 to 28.8 VDC)
Input current 3.5 mA typical (at 24 VDC), rated
current
ON voltage/ON current 15 VDC min./3 mA min.
(between IOG and each signal)
OFF voltage/OFF
current 5 VDC max./1 mA max.
(between IOG and each signal)
ON/OFF response
time 100 ns max./100 ns max.
Input filter time No filter *
Dimensions 12 (W) x 100 (H) x 71 (D) Isolation method Digital isolator isolation
Insulation
resistance 20 MΩ min. between isolated
circuits (at 100 VDC) Dielectric strength 510 VAC between isolated circuits for
1 minute at a leakage current of 5 mA
max.
I/O power supply
method Supply from the NX bus Current capacity of
I/O power supply
terminal IOV: 0.1 A/terminal max.,
IOG: 0.1 A/terminal max.
NX Unit power
consumption • Connected to a CPU Unit
0.90 W max.
• Connected to a Communi-
cations Coupler Unit
0.50 W max. Current
consumption from
I/O power supply 30 mA max.
Weight 65 g max.
Circuit layout
Installation
orientation and
restrictions Installation orientation:
• Connected to a CPU Unit: Possible in upright installation.
• Connected to a Communications Coupler Unit: Possible in 6 orientations.
Restrictions: No restrictions
Terminal
connection diagram
Disconnection/
Short-circuit
detection Not supported. Protective function Not supported.

* This model does not support the input filter. If the Unit is susceptible to noise, take countermeasures such as separating
or shielding the Unit and signal lines from the noise source. Refer to NX-series Digital I/O Unit User’s Manual (W521) for
information on countermeasures.

NX-ID4342

Unit name DC Input Unit Model NX-ID4342
Number of points 8 points External connection
terminals Screwless clamping terminal block (16
terminals)
I/O refreshing
method Selectable Synchronous I/O refreshing or Free-Run refreshing
Indicators TS indicator,
input indicator Internal I/O common NPN
Rated input voltage 24 VDC (15 to 28.8 VDC)
Input current 3.5 mA typical (at 24 VDC), rated
current
ON voltage/ON current 15 VDC min./3 mA min. (between IOG
and each signal)
OFF voltage/OFF
current 5 VDC max./1 mA max. (between IOG
and each signal)
ON/OFF response
time 20 μs max./400 μs max.
Input filter time Without filter, 0.25 ms, 0.5 ms, 1 ms
(factory setting), 2 ms, 4 ms, 8 ms, 16
ms, 32 ms, 64 ms, 128 ms, 256 ms
Dimensions 12 (W) x 100 (H) x 71 (D) Isolation method Photocoupler isolation
Insulation
resistance 20 MΩ min. between isolated
circuits (at 100 VDC) Dielectric strength 510 VAC between isolated circuits for
1 minute at a leakage current of 5 mA
max.
I/O power supply
method Supply from the NX bus Current capacity of
I/O power supply
terminal IOG: 0.1 A/terminal max.
NX Unit power
consumption • Connected to a CPU Unit or
Communication Control Unit
0.90 W max.
• Connected to a Communi-
cations Coupler Unit
0.50 W max. Current
consumption from
I/O power supply No consumption
Weight 65 g max.
Circuit layout
Installation
orientation and
restrictions Installation orientation:
• Connected to a CPU Unit or Communication Control Unit: Possible in upright installation.
• Connected to a Communications Coupler Unit: Possible in 6 orientations.
Restrictions: No restrictions
Terminal
connection diagram
Disconnection/
Short-circuit
detection Not supported. Protective function Not supported.

NX-ID4442

Unit name DC Input Unit Model NX-ID4442
Number of points 8 points External connection
terminals Screwless clamping terminal block (16
terminals)
I/O refreshing
method Selectable Synchronous I/O refreshing or Free-Run refreshing
Indicators TS indicator,
input indicator Internal I/O common PNP
Rated input voltage 24 VDC (15 to 28.8 VDC)
Input current 3.5 mA typical (at 24 VDC), rated
current
ON voltage/ON current 15 VDC min./3 mA min. (between IOG
and each signal)
OFF voltage/OFF
current 5 VDC max./1 mA max. (between IOG
and each signal)
ON/OFF response
time 20 μs max./400 μs max.
Input filter time Without filter, 0.25 ms, 0.5 ms, 1 ms
(factory setting), 2 ms, 4 ms, 8 ms, 16
ms, 32 ms, 64 ms, 128 ms, 256 ms
Dimensions 12 (W) x 100 (H) x 71 (D) Isolation method Photocoupler isolation
Insulation
resistance 20 MΩ min. between isolated
circuits (at 100 VDC) Dielectric strength 510 VAC between isolated circuits for
1 minute at a leakage current of 5 mA
max.
I/O power supply
method Supply from the NX bus Current capacity of
I/O power supply
terminal IOG: 0.1 A/terminal max.
NX Unit power
consumption • Connected to a CPU Unit or
Communication Control Unit
0.90 W max.
• Connected to a Communi-
cations Coupler Unit
0.50 W max. Current
consumption from
I/O power supply No consumption
Weight 65 g max.
Circuit layout
Installation
orientation and
restrictions Installation orientation:
• Connected to a CPU Unit or Communication Control Unit: Possible in upright installation.
• Connected to a Communications Coupler Unit: Possible in 6 orientations.
Restrictions: No restrictions
Terminal
connection diagram
Disconnection/
Short-circuit
detection Not supported. Protective function Not supported.

NX-ID5342

Unit name DC Input Unit Model NX-ID5342
Number of points 16 points External connection
terminals Screwless clamping terminal block (16
terminals)
I/O refreshing
method Selectable Synchronous I/O refreshing or Free-Run refreshing
Indicators TS indicator,
input indicator Internal I/O common NPN
Rated input voltage 24 VDC (15 to 28.8 VDC)
Input current 3.5 mA typical (at 24 VDC), rated
current
ON voltage/ON current 15 VDC min./2 mA min. (between IOG
and each signal)
OFF voltage/OFF
current 5 VDC max./0.5 mA max. (between IOG
and each signal)
ON/OFF response
time 20 μs max./400 μs max.
Input filter time Without filter, 0.25 ms, 0.5 ms, 1 ms
(factory setting), 2 ms, 4 ms, 8 ms, 16
ms, 32 ms, 64 ms, 128 ms, 256 ms
Dimensions 12 (W) x 100 (H) x 71 (D) Isolation method Photocoupler isolation
Insulation
resistance 20 MΩ min. between isolated
circuits (at 100 VDC) Dielectric strength 510 VAC between isolated circuits for
1 minute at a leakage current of 5 mA
max.
I/O power supply
method Supply from the NX bus Current capacity of
I/O power supply
terminal Without I/O power supply terminals
NX Unit power
consumption • Connected to a CPU Unit or
Communication Control Unit
0.90 W max.
• Connected to a Communi-
cations Coupler Unit
0.55 W max. Current
consumption from
I/O power supply No consumption
Weight 65 g max.
Circuit layout
Installation
orientation and
restrictions Installation orientation:
• Connected to a CPU Unit or Communication Control Unit: Possible in upright installation.
• Connected to a Communications Coupler Unit: Possible in 6 orientations.
Restrictions: No restrictions
Terminal
connection diagram
Disconnection/
Short-circuit
detection Not supported. Protective function Not supported.

NX-ID5442

Unit name DC Input Unit Model NX-ID5442
Number of points 16 points External connection
terminals Screwless clamping terminal block (16
terminals)
I/O refreshing
method Selectable Synchronous I/O refreshing or Free-Run refreshing
Indicators TS indicator,
input indicator Internal I/O common PNP
Rated input voltage 24 VDC (15 to 28.8 VDC)
Input current 3.5 mA typical (at 24 VDC), rated
current
ON voltage/ON current 15 VDC min./2 mA min. (between IOG
and each signal)
OFF voltage/OFF
current 5 VDC max./0.5 mA max. (between IOG
and each signal)
ON/OFF response
time 20 μs max./400 μs max.
Input filter time Without filter, 0.25 ms, 0.5 ms, 1 ms
(factory setting), 2 ms, 4 ms, 8 ms, 16
ms, 32 ms, 64 ms, 128 ms, 256 ms
Dimensions 12 (W) x 100 (H) x 71 (D) Isolation method Photocoupler isolation
Insulation
resistance 20 MΩ min. between isolated
circuits (at 100 VDC) Dielectric strength 510 VAC between isolated circuits for
1 minute at a leakage current of 5 mA
max.
I/O power supply
method Supply from the NX bus Current capacity of
I/O power supply
terminal Without I/O power supply terminals
NX Unit power
consumption • Connected to a CPU Unit or
Communication Control Unit
0.90 W max.
• Connected to a Communi-
cations Coupler Unit
0.55 W max. Current
consumption from
I/O power supply No consumption
Weight 65 g max.
Circuit layout
Installation
orientation and
restrictions Installation orientation:
• Connected to a CPU Unit or Communication Control Unit: Possible in upright installation.
• Connected to a Communications Coupler Unit: Possible in 6 orientations.
Restrictions: No restrictions
Terminal
connection diagram
Disconnection/
Short-circuit
detection Not supported. Protective function Not supported.

DC Input Unit (M3 Screw Terminal Block, 30 mm Width)
NX-ID5142-1

Unit name DC Input Unit Model NX-ID5142-1
Number of points 16 points External connection
terminals M3 screw terminal block (18 terminals)
I/O refreshing
method Switching Synchronous I/O refreshing and Free-Run refreshing
Indicators TS indicator,
input indicator
Internal I/O common For both NPN/PNP
Rated input voltage 24 VDC (15 to 28.8 VDC)
Input current 7 mA typical (at 24 VDC)
ON voltage/ON current 15 VDC min./3 mA min. (between COM
and each signal)
OFF voltage/OFF
current 5 VDC max./1 mA max. (between COM
and each signal)
ON/OFF response
time 20 μs max./400 μs max.
Input filter time No filter, 0.25 ms, 0.5 ms, 1 ms (default),
2 ms, 4 ms, 8 ms, 16 ms, 32 ms, 64 ms,
128 ms, 256 ms
Dimensions 30 (W) x 100 (H) x 71 (D) Isolation method Photocoupler isolation
Insulation
resistance 20 MΩ min. between isolated
circuits (at 100 VDC) Dielectric strength 510 VAC between isolated circuits for
1 minute at a leakage current of 5 mA
max.
I/O power supply
method Supply from external source Current capacity of
I/O power supply
terminal Without I/O power supply terminals
NX Unit power
consumption • Connected to a CPU Unit or
Communication Control Unit
0.85 W max.
• Connected to a Communi-
cations Coupler Unit
0.55 W max. Current
consumption from
I/O power supply No consumption
Weight 125 g max.
Circuit layout
Installation
orientation and
restrictions Installation orientation:
• Connected to a CPU Unit or Communication Control Unit: Possible in upright installation.
• Connected to a Communications Coupler Unit: Possible in 6 orientations.
Restrictions: As shown in the following.
Terminal
connection diagram
• The polarity of the input power supply can be connected in either direction.
Disconnection/
Short-circuit
detection Not supported. Protective function Not supported.

DC Input Unit (MIL Connector, 30 mm Width)
NX-ID5142-5

Unit name DC Input Unit Model NX-ID5142-5
Number of points 16 points External connection
terminals MIL connector (20 terminals)
I/O refreshing
method Switching Synchronous I/O refreshing and Free-Run refreshing
Indicators TS indicator,
input indicators
Internal I/O common For both NPN/PNP
Rated input voltage 24 VDC (15 to 28.8 VDC)
Input current 7 mA typical (at 24 VDC)
ON voltage/ON current 15 VDC min./3 mA min.
(between COM and each signal)
OFF voltage/OFF
current 5 VDC max./1 mA max.
(between COM and each signal)
ON/OFF response
time 20 μs max./400 μs max.
Input filter time No filter, 0.25 ms, 0.5 ms, 1 ms
(default), 2 ms, 4 ms, 8 ms, 16 ms,
32 ms, 64 ms, 128 ms, 256 ms
Dimensions 30 (W) x 100 (H) x 71 (D) Isolation method Photocoupler isolation
Insulation
resistance 20 MΩ min. between isolated
circuits (at 100 VDC) Dielectric strength 510 VAC between isolated circuits for
1 minute at a leakage current of 5 mA
max.
I/O power supply
method Supply from external source Current capacity of
I/O power supply
terminal Without I/O power supply terminals
NX Unit power
consumption • Connected to a CPU Unit or
Communication Control Unit
0.85 W max.
• Connected to a Communi-
cations Coupler Unit
0.55 W max. Current
consumption from
I/O power supply No consumption
Weight 85 g max.
Circuit layout
Installation
orientation and
restrictions Installation orientation:
• Connected to a CPU Unit or Communication Control Unit: Possible in upright installation.
• Connected to a Communications Coupler Unit: Possible in 6 orientations.
Restrictions: As shown in the following.
Terminal
connection diagram
• The polarity of the input power supply can be connected in either direction.
• Be sure to wire both pins 3 and 4 (COM), and set the same polarity for both pins.
Disconnection/
Short-circuit
detection Not supported. Protective function Not supported.

NX-ID6142-5

Unit name DC Input Unit Model NX-ID6142-5
Number of points 32 points External connection
terminals MIL connector (40 terminals)
I/O refreshing
method Switching Synchronous I/O refreshing and Free-Run refreshing
Indicators TS indicator,
input indicators
Internal I/O common For both NPN/PNP
Rated input voltage 24 VDC (19 to 28.8 VDC)
Input current 4.1 mA typical (24 VDC)
ON voltage/ON current 19 VDC min./3 mA min.
(between COM and each signal)
OFF voltage/OFF
current 5 VDC max./1 mA max.
(between COM and each signal)
ON/OFF response
time 20 μs max./400 μs max.
Input filter time No filter, 0.25 ms, 0.5 ms, 1 ms
(default), 2 ms, 4 ms, 8 ms, 16 ms,
32 ms, 64 ms, 128 ms, 256 ms
Dimensions 30 (W) x 100 (H) x 71 (D) Isolation method Photocoupler isolation
Insulation
resistance 20 MΩ min. between isolated
circuits (at 100 VDC) Dielectric strength 510 VAC between isolated circuits for
1 minute at a leakage current of 5 mA
max.
I/O power supply
method Supply from external source Current capacity of
I/O power supply
terminal Without I/O power supply terminals
NX Unit power
consumption • Connected to a CPU Unit or
Communication Control Unit
0.90 W max.
• Connected to a Communi-
cations Coupler Unit
0.60 W max. Current
consumption from
I/O power supply No consumption
Weight 90 g max.
Circuit layout
Installation
orientation and
restrictions Installation orientation:
• Connected to a CPU Unit or Communication Control Unit: Possible in upright installation.
• Connected to a Communications Coupler Unit: Possible in 6 orientations.
Restrictions: As shown in the following.
Terminal
connection diagram
• The polarity of the input power supply can be connected in either direction.
• Be sure to wire both pins 23 and 24 (COM0), and set the same polarity for both pins.
• Be sure to wire both pins 3 and 4 (COM1), and set the same polarity for both pins.
Disconnection/
Short-circuit
detection Not supported. Protective function Not supported.

DC Input Unit (Fujitsu Connector, 30 mm Width)
NX-ID6142-6

Unit name DC Input Unit Model NX-ID6142-6
Number of points 32 points External connection
terminals Fujitsu connector (40 terminals)
I/O refreshing
method Switching Synchronous I/O refreshing and Free-Run refreshing
Indicators TS indicator,
input indicator
Internal I/O common For both NPN/PNP
Rated input voltage 24 VDC (19 to 28.8 VDC)
Input current 4.1 mA typical (24 VDC)
ON voltage/ON current 19 VDC min./3 mA min.
(between COM and each signal)
OFF voltage/OFF
current 5 VDC max./1 mA max.
(between COM and each signal)
ON/OFF response
time 20 μs max./400 μs max.
Input filter time No filter, 0.25 ms, 0.5 ms, 1 ms (default),
2 ms, 4 ms, 8 ms, 16 ms, 32 ms, 64 ms,
128 ms, 256 ms
Dimensions 30 (W) x 100 (H) x 71 (D) Isolation method Photocoupler isolation
Insulation
resistance 20 MΩ min. between isolated
circuits (at 100 VDC) Dielectric strength 510 VAC between isolated circuits for
1 minute at a leakage current of 5 mA
max.
I/O power supply
method Supply from external source Current capacity of
I/O power supply
terminal Without I/O power supply terminals
NX Unit power
consumption • Connected to a CPU Unit or
Communication Control Unit
0.95 W max.
• Connected to a Communi-
cations Coupler Unit
0.55 W max. Current
consumption from
I/O power supply No consumption
Weight 90 g max.
Circuit layout
Installation
orientation and
restrictions Installation orientation:
• Connected to a CPU Unit or Communication Control Unit: Possible in upright installation.
• Connected to a Communications Coupler Unit: Possible in 6 orientations.
Restrictions: As shown in the following.
Terminal
connection diagram
• The polarity of the input power supply can be connected in either direction.
• Be sure to wire both pins A9 and A18 (COM0), and set the same polarity for both pins.
• Be sure to wire both pins B9 and B18 (COM1), and set the same polarity for both pins.
Disconnection/
Short-circuit
detection Not supported. Protective function Not supported.

AC Input Unit (Screwless Clamping Terminal Block, 12 mm Width)
NX-IA3117

Unit name AC Input Unit Model NX-IA3117
Number of points 4 points,
independent contacts External connection
terminals Screwless clamping terminal block (8
terminals)
Capacity Free-Run refreshing
Indicators TS indicator,
input indicator Internal I/O common No polarity
Rated input voltage 200 to 240 VAC, 50/60 Hz (170 to
264 VAC, ±3 Hz)
Input current 9 mA typical (at 200 VAC, 50 Hz)
11 mA typical (at 200 VAC, 60 Hz)
ON voltage/
ON current 120 VAC min./4 mA min.
OFF voltage/
OFF current 40 VAC max./2 mA max.
ON/OFF response time 10 ms max./40 ms max.
Input filter time No filter, 0.25 ms, 0.5 ms, 1 ms
(default), 2 ms, 4 ms, 8 ms, 16 ms,
32 ms, 64 ms, 128 ms, 256 ms
Dimensions 12 (W) x 100 (H) x 71 (D) Isolation method Photocoupler isolation
Insulation
resistance Between each AC input
circuit: 20 MΩ min. (at 500
VDC)
Between the external
terminals and the functional
ground terminal: 20 MΩ min.
(at 500 VDC)
Between the external
terminals and internal
circuits: 20 MΩ min. (at 500
VDC)
Between the internal circuit
and the functional ground
terminal: 20 MΩ min. (at 100
VDC) Dielectric strength Between each AC input circuit:
AC3700V VAC for 1 min at a leakage
current of 5 mA max.
Between the external terminals and
functional ground terminal: 2300 VAC
for 1 min at a leakage current of 5 mA
max.
Between the external terminals and
internal circuits: 2300 VAC for 1 min
at a leakage current of 5 mA max.
Between the internal circuit and the
functional ground terminal: 510 VAC
for 1 min at a leakage current of 5 mA
max.
I/O power supply
method Supplied from external
source. Current capacity of
I/O power supply
terminal Without I/O power supply terminals
NX Unit power
consumption • Connected to a CPU Unit or
Communication Control Unit
0.80 W max.
• Connected to a Communi-
cations Coupler Unit
0.50 W max. Current
consumption from
I/O power supply No consumption
Weight 60 g max.
Circuit layout
Installation
orientation and
restrictions Installation orientation:
• Connected to a CPU Unit or Communication Control Unit: Possible in upright installation.
• Connected to a Communications Coupler Unit: Possible in 6 orientations.
Restrictions: No restrictions
Terminal
connection diagram
Disconnection/
Short-circuit
detection Not supported. Protective function Not supported.

Digital Output Unit Specifications
Transistor Output Unit (Screwless Clamping Terminal Block, 12 mm Width)
NX-OD2154

Unit name Transistor Output Unit Model NX-OD2154
Number of points 2 points External connection
terminals Screwless clamping terminal block
(8 terminals)
I/O refreshing
method Output refreshing with specified time stamp
Indicators TS indicator,
output indicator
Internal I/O common NPN
Rated voltage 24 VDC
Operating load
voltage range 15 to 28.8 VDC
Maximum value of
load current 0.5 A/point, 1 A/Unit
Maximum inrush
current 4.0 A/point, 10 ms max.
Leakage current 0.1 mA max.
Residual voltage 1.5 V max.
ON/OFF response
time 300 ns max./300 ns max.
Dimensions 12 (W) x 100 (H) x 71 (D) Isolation method Digital isolator isolation
Insulation
resistance 20 MΩ min. between isolated
circuits (at 100 VDC) Dielectric strength 510 VAC between isolated circuits for
1 minute at a leakage current of 5 mA
max.
I/O power supply
method Supply from the NX bus Current capacity of
I/O power supply
terminal IOV: 0.5 A/terminal max.,
IOG: 0.5 A/terminal max.
NX Unit power
consumption • Connected to a CPU Unit
0.85 W max.
• Connected to a Communi-
cations Coupler Unit
0.45 W max. I/O current
consumption 30 mA max.
Weight 70 g max.
Circuit layout
This unit uses a push-pull output circuit.
Installation
orientation and
restrictions Installation orientation:
• Connected to a CPU Unit: Possible in upright installation.
• Connected to a Communications Coupler Unit: Possible in 6 orientations.
Restrictions: No restrictions
Terminal
connection diagram
Disconnection/
Short-circuit
detection Not supported. Protective function Not supported.

NX-OD2258

Unit name Transistor Output Unit Model NX-OD2258
Number of points 2 points External connection
terminals Screwless clamping terminal block
(8 terminals)
I/O refreshing
method Output refreshing with specified time stamp
Indicators TS indicator,
output indicator
Internal I/O common PNP
Rated voltage 24 VDC
Operating load
voltage range 15 to 28.8 VDC
Maximum value of
load current 0.5 A/point, 1 A/Unit
Maximum inrush
current 4.0 A/point, 10 ms max.
Leakage current 0.1 mA max.
Residual voltage 1.5 V max.
ON/OFF response
time 300 ns max./300 ns max.
Dimensions 12 (W) x 100 (H) x 71 (D) Isolation method Digital isolator isolation
Insulation
resistance 20 MΩ min. between isolated
circuits (at 100 VDC) Dielectric strength 510 VAC between isolated circuits for
1 minute at a leakage current of 5 mA
max.
I/O power supply
method Supply from the NX bus Current capacity of
I/O power supply
terminal IOV: 0.5 A/terminal max.,
IOG: 0.5 A/terminal max.
NX Unit power
consumption • Connected to a CPU Unit
0.85 W max.
• Connected to a Communi-
cations Coupler Unit
0.50 W max. I/O current
consumption 40 mA max.
Weight 70 g max.
Circuit layout
This unit uses a push-pull output circuit.
Installation
orientation and
restrictions Installation orientation:
• Connected to a CPU Unit: Possible in upright installation.
• Connected to a Communications Coupler Unit: Possible in 6 orientations.
Restrictions: No restrictions
Terminal
connection diagram
Disconnection/
Short-circuit
detection Not supported. Protective function With load short-circuit protection.

NX-OD3121

Unit name Transistor Output Unit Model NX-OD3121
Number of points 4 points External connection
terminals Screwless clamping terminal block (12
terminals)
I/O refreshing
method Selectable Synchronous I/O refreshing or Free-Run refreshing
Indicators TS indicator,
output indicator
Internal I/O common NPN
Rated voltage 12 to 24 VDC
Operating load
voltage range 10.2 to 28.8 VDC
Maximum value of
load current 0.5 A/point, 2 A/Unit
Maximum inrush
current 4.0 A/point, 10 ms max.
Leakage current 0.1 mA max.
Residual voltage 1.5 V max.
ON/OFF response
time 0.1 ms max./0.8 ms max.
Dimensions 12 (W) x 100 (H) x 71 (D) Isolation method Photocoupler isolation
Insulation
resistance 20 MΩ min. between isolated
circuits (at 100 VDC) Dielectric strength 510 VAC between isolated circuits for
1 minute at a leakage current of 5 mA
max.
I/O power supply
method Supply from the NX bus Current capacity of
I/O power supply
terminal IOV: 0.5 A/terminal max.,
IOG: 0.5 A/terminal max.
NX Unit power
consumption • Connected to a CPU Unit or
Communication Control Unit
0.90 W max.
• Connected to a Communi-
cations Coupler Unit
0.55 W max. I/O current
consumption 10 mA max.
Weight 70 g max.
Circuit layout
Installation
orientation and
restrictions Installation orientation:
• Connected to a CPU Unit or Communication Control Unit: Possible in upright installation.
• Connected to a Communications Coupler Unit: Possible in 6 orientations.
Restrictions: No restrictions
Terminal
connection diagram
Disconnection/
Short-circuit
detection Not supported. Protective function Not supported.

NX-OD3153

Unit name Transistor Output Unit Model NX-OD3153
Number of points 4 points External connection
terminals Screwless clamping terminal block (12
terminals)
I/O refreshing
method Selectable Synchronous I/O refreshing or Free-Run refreshing
Indicators TS indicator,
output indicator
Internal I/O common NPN
Rated voltage 24 VDC
Operating load
voltage range 15 to 28.8 VDC
Maximum value of
load current 0.5 A/point, 2 A/Unit
Maximum inrush
current 4.0 A/point, 10 ms max.
Leakage current 0.1 mA max.
Residual voltage 1.5 V max.
ON/OFF response
time 300 ns max./300 ns max.
Dimensions 12 (W) x 100 (H) x 71 (D) Isolation method Digital isolator isolation
Insulation
resistance 20 MΩ min. between isolated
circuits (at 100 VDC) Dielectric strength 510 VAC between isolated circuits for
1 minute at a leakage current of 5 mA
max.
I/O power supply
method Supply from the NX bus Current capacity of
I/O power supply
terminal IOV: 0.5 A/terminal max.,
IOG: 0.5 A/terminal max.
NX Unit power
consumption • Connected to a CPU Unit or
Communication Control Unit
0.90 W max.
• Connected to a Communi-
cations Coupler Unit
0.50 W max. I/O current
consumption 30 mA max.
Weight 70 g max.
Circuit layout
This unit uses a push-pull output circuit.
Installation
orientation and
restrictions Installation orientation:
• Connected to a CPU Unit or Communication Control Unit: Possible in upright installation.
• Connected to a Communications Coupler Unit: Possible in 6 orientations.
Restrictions: No restrictions
Terminal
connection diagram
Disconnection/
Short-circuit
detection Not supported. Protective function Not supported.

NX-OD3256

Unit name Transistor Output Unit Model NX-OD3256
Number of points 4 points External connection
terminals Screwless clamping terminal block (12
terminals)
I/O refreshing
method Selectable Synchronous I/O refreshing or Free-Run refreshing
Indicators TS indicator,
output indicator
Internal I/O common PNP
Rated voltage 24 VDC
Operating load
voltage range 15 to 28.8 VDC
Maximum value of
load current 0.5 A/point, 2 A/Unit
Maximum inrush
current 4.0 A/point, 10 ms max.
Leakage current 0.1 mA max.
Residual voltage 1.5 V max.
ON/OFF response
time 0.5 ms max./1.0 ms max.
Dimensions 12 (W) x 100 (H) x 71 (D) Isolation method Photocoupler isolation
Insulation
resistance 20 MΩ min. between isolated
circuits (at 100 VDC) Dielectric strength 510 VAC between isolated circuits for
1 minute at a leakage current of 5 mA
max.
I/O power supply
method Supply from the NX bus Current capacity of
I/O power supply
terminal IOV: 0.5 A/terminal max.,
IOG: 0.5 A/terminal max.
NX Unit power
consumption • Connected to a CPU Unit or
Communication Control Unit
0.90 W max.
• Connected to a Communi-
cations Coupler Unit
0.55 W max. I/O current
consumption 20 mA max.
Weight 70 g max.
Circuit layout
Installation
orientation and
restrictions Installation orientation:
• Connected to a CPU Unit or Communication Control Unit: Possible in upright installation.
• Connected to a Communications Coupler Unit: Possible in 6 orientations.
Restrictions: No restrictions
Terminal
connection diagram
Disconnection/
Short-circuit
detection Not supported. Protective function With load short-circuit protection.

NX-OD3257

Unit name Transistor Output Unit Model NX-OD3257
Number of points 4 points External connection
terminals Screwless clamping terminal block (12
terminals)
I/O refreshing
method Selectable Synchronous I/O refreshing or Free-Run refreshing
Indicators TS indicator,
output indicator
Internal I/O common PNP
Rated voltage 24 VDC
Operating load
voltage range 15 to 28.8 VDC
Maximum value of
load current 0.5 A/point, 2 A/Unit
Maximum inrush
current 4.0 A/point, 10 ms max.
Leakage current 0.1 mA max.
Residual voltage 1.5 V max.
ON/OFF response
time 300 ns max./300 ns max.
Dimensions 12 (W) x 100 (H) x 71 (D) Isolation method Digital isolator isolation
Insulation
resistance 20 MΩ min. between isolated
circuits (at 100 VDC) Dielectric strength 510 VAC between isolated circuits for
1 minute at a leakage current of 5 mA
max.
I/O power supply
method Supply from the NX bus Current capacity of
I/O power supply
terminal IOV: 0.5 A/terminal max.,
IOG: 0.5 A/terminal max.
NX Unit power
consumption • Connected to a CPU Unit or
Communication Control Unit
0.85 W max.
• Connected to a Communi-
cations Coupler Unit
0.50 W max. I/O current
consumption 40 mA max.
Weight 70 g max.
Circuit layout
This unit uses a push-pull output circuit.
Installation
orientation and
restrictions Installation orientation:
• Connected to a CPU Unit or Communication Control Unit: Possible in upright installation.
• Connected to a Communications Coupler Unit: Possible in 6 orientations.
Restrictions: No restrictions
Terminal
connection diagram
Disconnection/
Short-circuit
detection Not supported. Protective function With load short-circuit protection.

NX-OD3268

Unit name Transistor Output Unit Model NX-OD3268
Number of points 4 points External connection
terminals Screwless clamping terminal block (16
terminals)
I/O refreshing
method Switching Synchronous I/O refreshing and Free-Run refreshing
Indicators TS indicator,
output indicator
Internal I/O common PNP
Rated voltage 24 VDC
Operating load
voltage range 15 to 28.8 VDC
Maximum value of
load current 2 A/point, 8 A/Unit
Maximum inrush
current 4.0 A/point, 10 ms max.
Leakage current 0.1 mA max.
Residual voltage 1.5 V max.
ON/OFF response
time 0.5 ms max./1.0 ms max.
Dimensions 12 (W) x 100 (H) x 71 (D) Isolation method Photocoupler isolation
Insulation
resistance 20 MΩ min. between isolated
circuits (at 100 VDC) Dielectric strength 510 VAC between isolated circuits for
1 minute at a leakage current of 5 mA max.
I/O power supply
method Supply from external source Current capacity of
I/O power supply
terminal IOV: 2 A/terminal max.,
IOG: 2 A/terminal max.,
COM (+V): 4 A/terminal max.,
0V: 4 A/terminal max.
NX Unit power
consumption • Connected to a CPU Unit or
Communication Control Unit
0.85 W max.
• Connected to a Communi-
cations Coupler Unit
0.50 W max. Current
consumption from
I/O power supply 20 mA max.
Weight 70 g max.
Circuit layout
Installation
orientation and
restrictions Installation orientation:
• Connected to a CPU Unit or Communication Control Unit: Possible in upright installation.
• Connected to a Communications Coupler Unit: Possible in 6 orientations.
Restrictions: No restrictions
Terminal
connection diagram
• 0V has 2 terminals, so be sure to wire both terminals.
• COM (+V) has 2 terminals, so be sure to wire both terminals.
Disconnection/
Short-circuit
detection Not supported. Protective function With load short-circuit protection.

NX-OD4121

Unit name Transistor Output Unit Model NX-OD4121
Number of points 8 points External connection
terminals Screwless clamping terminal block (16
terminals)
I/O refreshing
method Selectable Synchronous I/O refreshing or Free-Run refreshing
Indicators TS indicator,
output indicator
Internal I/O common NPN
Rated voltage 12 to 24 VDC
Operating load
voltage range 10.2 to 28.8 VDC
Maximum value of
load current 0.5 A/point, 4 A/Unit
Maximum inrush
current 4.0 A/point, 10 ms max.
Leakage current 0.1 mA
Residual voltage 1.5 V max.
ON/OFF response
time 0.1 ms max./0.8 ms max.
Dimensions 12 (W) x 100 (H) x 71 (D) Isolation method Photocoupler isolation
Insulation
resistance 20 MΩ min. between isolated
circuits (at 100 VDC) Dielectric strength 510 VAC between isolated circuits for
1 minute at a leakage current of 5 mA
max.
I/O power supply
method Supply from the NX bus Current capacity of
I/O power supply
terminal IOV: 0.5 A/terminal max.
NX Unit power
consumption • Connected to a CPU Unit or
Communication Control Unit
0.90 W max.
• Connected to a Communi-
cations Coupler Unit
0.55 W max. I/O current
consumption 10 mA max.
Weight 70 g max.
Circuit layout
Installation
orientation and
restrictions Installation orientation:
• Connected to a CPU Unit or Communication Control Unit: Possible in upright installation.
• Connected to a Communications Coupler Unit: Possible in 6 orientations.
Restrictions: No restrictions
Terminal
connection diagram
Disconnection/
Short-circuit
detection Not supported. Protective function Not supported.

NX-OD4256

Unit name Transistor Output Unit Model NX-OD4256
Number of points 8 points External connection
terminals Screwless clamping terminal block (16
terminals)
I/O refreshing
method Selectable Synchronous I/O refreshing or Free-Run refreshing
Indicators TS indicator,
output indicator
Internal I/O common PNP
Rated voltage 24 VDC
Operating load
voltage range 15 to 28.8 VDC
Maximum value of
load current 0.5 A/point, 4 A/Unit
Maximum inrush
current 4.0 A/point, 10 ms max.
Leakage current 0.1 mA
Residual voltage 1.5 V max.
ON/OFF response
time 0.5 ms max./1.0 ms max.
Dimensions 12 (W) x 100 (H) x 71 (D) Isolation method Photocoupler isolation
Insulation
resistance 20 MΩ min. between isolated
circuits (at 100 VDC) Dielectric strength 510 VAC between isolated circuits for
1 minute at a leakage current of 5 mA
max.
I/O power supply
method Supply from the NX bus Current capacity of
I/O power supply
terminal IOG: 0.5 A/terminal max.
NX Unit power
consumption • Connected to a CPU Unit or
Communication Control Unit
1.00 W max.
• Connected to a Communi-
cations Coupler Unit
0.65 W max. I/O current
consumption 30 mA max.
Weight 70 g max.
Circuit layout
Installation
orientation and
restrictions Installation orientation:
• Connected to a CPU Unit or Communication Control Unit: Possible in upright installation.
• Connected to a Communications Coupler Unit: Possible in 6 orientations.
Restrictions: No restrictions
Terminal
connection diagram
Disconnection/
Short-circuit
detection Not supported. Protective function With load short-circuit protection.

NX-OD5121

Unit name Transistor Output Unit Model NX-OD5121
Number of points 16 points External connection
terminals Screwless clamping terminal block (16
terminals)
I/O refreshing
method Selectable Synchronous I/O refreshing or Free-Run refreshing
Indicators TS indicator,
output indicator
Internal I/O common NPN
Rated voltage 12 to 24 VDC
Operating load
voltage range 10.2 to 28.8 VDC
Maximum value of
load current 0.5 A/point, 4 A/Unit
Maximum inrush
current 4.0 A/point, 10 ms max.
Leakage current 0.1 mA max.
Residual voltage 1.5 V max.
ON/OFF response
time 0.1 ms max./0.8 ms max.
Dimensions 12 (W) x 100 (H) x 71 (D) Isolation method Photocoupler isolation
Insulation
resistance 20 MΩ min. between isolated
circuits (at 100 VDC) Dielectric strength 510 VAC between isolated circuits for
1 minute at a leakage current of 5 mA
max.
I/O power supply
method Supply from the NX bus Current capacity of
I/O power supply
terminal Without I/O power supply terminals
NX Unit power
consumption • Connected to a CPU Unit or
Communication Control Unit
1.00 W max.
• Connected to a Communi-
cations Coupler Unit
0.65 W max. I/O current
consumption 20 mA max.
Weight 70 g max.
Circuit layout
Installation
orientation and
restrictions Installation orientation:
• Connected to a CPU Unit or Communication Control Unit: Possible in upright installation.
• Connected to a Communications Coupler Unit: Possible in 6 orientations.
Restrictions: No restrictions
Terminal
connection diagram
Disconnection/
Short-circuit
detection Not supported. Protective function Not supported.

NX-OD5256

Unit name Transistor Output Unit Model NX-OD5256
Number of points 16 points External connection
terminals Screwless clamping terminal block (16
terminals)
I/O refreshing
method Selectable Synchronous I/O refreshing or Free-Run refreshing
Indicators TS indicator,
output indicator
Internal I/O common PNP
Rated voltage 24 VDC
Operating load
voltage range 15 to 28.8 VDC
Maximum value of
load current 0.5 A/point, 4 A/Unit
Maximum inrush
current 4.0 A/point, 10 ms max.
Leakage current 0.1 mA max.
Residual voltage 1.5 V max.
ON/OFF response
time 0.5 ms max./1.0 ms max.
Dimensions 12 (W) x 100 (H) x 71 (D) Isolation method Photocoupler isolation
Insulation
resistance 20 MΩ min. between isolated
circuits (at 100 VDC) Dielectric strength 510 VAC between isolated circuits for
1 minute at a leakage current of 5 mA
max.
I/O power supply
method Supply from the NX bus Current capacity of
I/O power supply
terminal Without I/O power supply terminals
NX Unit power
consumption • Connected to a CPU Unit or
Communication Control Unit
1.10 W max.
• Connected to a Communi-
cations Coupler Unit
0.70 W max. I/O current
consumption 40 mA max.
Weight 70 g max.
Circuit layout
Installation
orientation and
restrictions Installation orientation:
• Connected to a CPU Unit or Communication Control Unit: Possible in upright installation.
• Connected to a Communications Coupler Unit: Possible in 6 orientations.
Restrictions: No restrictions
Terminal
connection diagram
Disconnection/
Short-circuit
detection Not supported. Protective function With load short-circuit protection.

Transistor Output Unit (M3 Screw Terminal Block, 30 mm Width)
NX-OD5121-1

Unit name Transistor Output Unit Model NX-OD5121-1
Number of points 16 points External connection
terminals M3 screw terminal block (18 terminals)
I/O refreshing
method Switching Synchronous I/O refreshing and Free-Run refreshing
Indicators TS indicator,
output indicator
Internal I/O common NPN
Rated voltage 12 to 24 VDC
Operating load
voltage range 10.2 to 28.8 VDC
Maximum value of
load current 0.5 A/point, 5 A/Unit
Maximum inrush
current 4.0 A/point, 10 ms max.
Leakage current 0.1 mA max.
Residual voltage 1.5 V max.
ON/OFF response
time 0.1 ms max./0.8 ms max.
Dimensions 30 (W) x 100 (H) x 71 (D) Isolation method Photocoupler isolation
Insulation
resistance 20 MΩ min. between isolated
circuits (at 100 VDC) Dielectric strength 510 VAC between isolated circuits for
1 minute at a leakage current of 5 mA max.
I/O power supply
method Supply from the external
source Current capacity of
I/O power supply
terminal Without I/O power supply terminals
NX Unit power
consumption • Connected to a CPU Unit or
Communication Control Unit
0.90 W max.
• Connected to a Communi-
cations Coupler Unit
0.60 W max. Current
consumption from
I/O power supply 30 mA max.
Weight 125 g max.
Circuit layout
Installation
orientation and
restrictions Installation orientation:
• Connected to a CPU Unit or Communication Control Unit: Possible in upright installation.
• Connected to a Communications Coupler Unit: Possible in 6 orientations.
Restrictions: No restrictions
Terminal
connection diagram
Disconnection/
Short-circuit
detection Not supported. Protective function Not supported.

NX-OD5256-1

Unit name Transistor Output Unit Model NX-OD5256-1
Number of points 16 points External connection
terminals M3 screw terminal block (18 terminals)
I/O refreshing
method Switching Synchronous I/O refreshing and Free-Run refreshing
Indicators TS indicator,
output indicator
Internal I/O common PNP
Rated voltage 24 VDC
Operating load
voltage range 20.4 to 28.8 VDC
Maximum value of
load current 0.5 A/point, 5 A/Unit
Maximum inrush
current 4.0 A/point, 10 ms max.
Leakage current 0.1 mA max.
Residual voltage 1.5 V max.
ON/OFF response
time 0.5 ms max./1.0 ms max.
Dimensions 30 (W) x 100 (H) x 71 (D) Isolation method Photocoupler isolation
Insulation
resistance 20 MΩ min. between isolated
circuits (at 100 VDC) Dielectric strength 510 VAC between isolated circuits for
1 minute at a leakage current of 5 mA max.
I/O power supply
method Supply from external source Current capacity of
I/O power supply
terminal Without I/O power supply terminals
NX Unit power
consumption • Connected to a CPU Unit or
Communication Control Unit
0.95 W max.
• Connected to a Communi-
cations Coupler Unit
0.65 W max. Current
consumption from
I/O power supply 30 mA max.
Weight 125 g max.
Circuit layout
Installation
orientation and
restrictions Installation orientation:
• Connected to a CPU Unit or Communication Control Unit: Possible in upright installation.
• Connected to a Communications Coupler Unit: Possible in 6 orientations.
Restrictions: No restrictions
Terminal
connection diagram
Disconnection/
Short-circuit
detection Not supported. Protective function With load short-circuit protection.

Transistor Output Unit (MIL Connector, 30 mm Width)
NX-OD5121-5

Unit name Transistor Output Unit Model NX-OD5121-5
Number of points 16 points External connection
terminals MIL connector (20 terminals)
I/O refreshing
method Switching Synchronous I/O refreshing and Free-Run refreshing
Indicators TS indicator,
output indicator
Internal I/O common NPN
Rated voltage 12 to 24 VDC
Operating load
voltage range 10.2 to 28.8 VDC
Maximum value of
load current 0.5 A/point, 2 A/Unit
Maximum inrush
current 4.0 A/point, 10 ms max.
Leakage current 0.1 mA max.
Residual voltage 1.5 V max.
ON/OFF response
time 0.1 ms max./0.8 ms max.
Dimensions 30 (W) x 100 (H) x 71 (D) Isolation method Photocoupler isolation
Insulation
resistance 20 MΩ min. between isolated
circuits (at 100 VDC) Dielectric strength 510 VAC between isolated circuits for
1 minute at a leakage current of 5 mA
max.
I/O power supply
method Supply from external source Current capacity of
I/O power supply
terminal Without I/O power supply terminals
NX Unit power
consumption • Connected to a CPU Unit or
Communication Control Unit
0.95 W max.
• Connected to a Communi-
cations Coupler Unit
0.60 W max. Current
consumption from
I/O power supply 30 mA max.
Weight 80 g max.
Circuit layout
Installation
orientation and
restrictions Installation orientation:
• Connected to a CPU Unit or Communication Control Unit: Possible in upright installation.
• Connected to a Communications Coupler Unit: Possible in 6 orientations.
Restrictions: No restrictions
Terminal
connection diagram
• Be sure to wire both pins 3 and 4 (COM).
• Be sure to wire both pins 1 and 2 (+V).
Disconnection/
Short-circuit
detection Not supported. Protective function Not supported.

NX-OD5256-5

Unit name Transistor Output Unit Model NX-OD5256-5
Number of points 16 points External connection
terminals MIL connector (20 terminals)
I/O refreshing
method Switching Synchronous I/O refreshing and Free-Run refreshing
Indicators TS indicator,
output indicator
Internal I/O common PNP
Rated voltage 24 VDC
Operating load
voltage range 20.4 to 28.8 VDC
Maximum value of
load current 0.5 A/point, 2 A/Unit
Maximum inrush
current 4.0 A/point, 10 ms max.
Leakage current 0.1 mA max.
Residual voltage 1.5 V max.
ON/OFF response
time 0.5 ms max./1.0 ms max.
Dimensions 30 (W) x 100 (H) x 71 (D) Isolation method Photocoupler isolation
Insulation
resistance 20 MΩ min. between isolated
circuits (at 100 VDC) Dielectric strength 510 VAC between isolated circuits for
1 minute at a leakage current of 5 mA
max.
I/O power supply
method Supplied from external
source. Current capacity of
I/O power supply
terminal Without I/O power supply terminals
NX Unit power
consumption • Connected to a CPU Unit or
Communication Control Unit
1.00 W max.
• Connected to a Communi-
cations Coupler Unit
0.70 W max. Current
consumption from
I/O power supply 40 mA max.
Weight 85 g max.
Circuit layout
Installation
orientation and
restrictions Installation orientation:
• Connected to a CPU Unit or Communication Control Unit: Possible in upright installation.
• Connected to a Communications Coupler Unit: Possible in 6 orientations.
Restrictions: No restrictions
Terminal
connection diagram
• Be sure to wire both pins 1 and 2 (COM (+V)).
• Be sure to wire both pins 3 and 4 (0V).
Disconnection/
Short-circuit
detection Not supported. Protective function With load short-circuit protection.

NX-OD6121-5

Unit name Transistor Output Unit Model NX-OD6121-5
Number of points 32 points External connection
terminals MIL connector (40 terminals)
I/O refreshing
method Switching Synchronous I/O refreshing and Free-Run refreshing
Indicators TS indicator,
output indicator
Internal I/O common NPN
Rated voltage 12 to 24 VDC
Operating load
voltage range 10.2 to 28.8 VDC
Maximum value of
load current 0.5 A/point, 2 A/common, 4 A/Unit
Maximum inrush
current 4.0 A/point, 10 ms max.
Leakage current 0.1 mA max.
Residual voltage 1.5 V max.
ON/OFF response
time 0.1 ms max./0.8 ms max.
Dimensions 30 (W) x 100 (H) x 71 (D) Isolation method Photocoupler isolation
Insulation
resistance 20 MΩ min. between isolated
circuits (at 100 VDC) Dielectric strength 510 VAC between isolated circuits for
1 minute at a leakage current of 5 mA
max.
I/O power supply
method Supply from external source Current capacity of
I/O power supply
terminal Without I/O power supply terminals
NX Unit power
consumption • Connected to a CPU Unit or
Communication Control Unit
1.00 W max.
• Connected to a Communi-
cations Coupler Unit
0.80 W max. Current
consumption from
I/O power supply 50 mA max.
Weight 90 g max.
Circuit layout
Installation
orientation and
restrictions Installation orientation:
• Connected to a CPU Unit or Communication Control Unit: Possible in upright installation.
• Connected to a Communications Coupler Unit: Possible in 6 orientations.
Restrictions: No restrictions
Terminal
connection diagram
• Be sure to wire both pins 21 and 22 (+V0).
• Be sure to wire both pins 23 and 24 (COM0).
• Be sure to wire both pins 1 and 2 (+V1).
• Be sure to wire both pins 3 and 4 (COM1).
Disconnection/
Short-circuit
detection Not supported. Protective function Not supported.

NX-OD6256-5

Unit name Transistor Output Unit Model NX-OD6256-5
Number of points 32 points External connection
terminals MIL connector (40 terminals)
I/O refreshing
method Switching Synchronous I/O refreshing and Free-Run refreshing
Indicators TS indicator,
output indicator
Internal I/O common PNP
Rated voltage 24 VDC
Operating load
voltage range 20.4 to 28.8 VDC
Maximum value of
load current 0.5 A/point, 2 A/common, 4 A/Unit
Maximum inrush
current 4.0 A/point, 10 ms max.
Leakage current 0.1 mA max.
Residual voltage 1.5 V max.
ON/OFF response
time 0.5 ms max./1.0 ms max.
Dimensions 30 (W) x 100 (H) x 71 (D) Isolation method Photocoupler isolation
Insulation
resistance 20 MΩ min. between isolated
circuits (at 100 VDC) Dielectric strength 510 VAC between isolated circuits for
1 minute at a leakage current of 5 mA
max.
I/O power supply
method Supply from external source Current capacity of
I/O power supply
terminal Without I/O power supply terminals
NX Unit power
consumption • Connected to a CPU Unit or
Communication Control Unit
1.30 W max.
• Connected to a Communi-
cations Coupler Unit
1.00 W max. Current
consumption from
I/O power supply 80 mA max.
Weight 95 g max.
Circuit layout
Installation
orientation and
restrictions Installation orientation:
• Connected to a CPU Unit or Communication Control Unit: Possible in upright installation.
• Connected to a Communications Coupler Unit: Possible in 6 orientations.
Restrictions: No restrictions
Terminal
connection diagram
• Be sure to wire both pins 21 and 22 (COM0 (+V)).
• Be sure to wire both pins 1 and 2 (COM1 (+V)).
• Be sure to wire both pins 23 and 24 (0V0).
• Be sure to wire both pins 3 and 4 (0V1).
Disconnection/
Short-circuit
detection Not supported. Protective function With load short-circuit protection.

Transistor Output Unit (Fujitsu Connector, 30 mm Width)
NX-OD6121-6

Unit name Transistor Output Unit Model NX-OD6121-6
Number of points 32 points External connection
terminals Fujitsu connector (40 terminals)
I/O refreshing
method Switching Synchronous I/O refreshing and Free-Run refreshing
Indicators TS indicator,
output indicator
Internal I/O common NPN
Rated voltage 12 to 24 VDC
Operating load
voltage range 10.2 to 28.8 VDC
Maximum value of
load current 0.5 A/point, 2 A/common, 4 A/Unit
Maximum inrush
current 4.0 A/point, 10 ms max.
Leakage current 0.1 mA max.
Residual voltage 1.5 V max.
ON/OFF response
time 0.1 ms max./0.8 ms max.
Dimensions 30 (W) x 100 (H) x 71 (D) Isolation method Photocoupler isolation
Insulation
resistance 20 MΩ min. between isolated
circuits (at 100 VDC) Dielectric strength 510 VAC between isolated circuits for
1 minute at a leakage current of 5 mA max.
I/O power supply
method Supply from external source Current capacity of
I/O power supply
terminal Without I/O power supply terminals
NX Unit power
consumption • Connected to a CPU Unit or
Communication Control Unit
1.10 W max.
• Connected to a Communi-
cations Coupler Unit
0.80 W max. Current
consumption from
I/O power supply 50 mA max.
Weight 90 g max.
Circuit layout
Installation
orientation and
restrictions Installation orientation:
• Connected to a CPU Unit or Communication Control Unit: Possible in upright installation.
• Connected to a Communications Coupler Unit: Possible in 6 orientations.
Restrictions: No restrictions
Terminal
connection diagram
• Be sure to wire both pins A9 and A19 (COM0).
• Be sure to wire both pins B9 and B19 (COM1).
• Be sure to wire both pins A10 and A20 (+V0).
• Be sure to wire both pins B10 and B20 (+V1).
Disconnection/
Short-circuit
detection Not supported. Protective function Not supported.

Relay Output Unit (Screwless Clamping Terminal Block, 12 mm Width)
NX-OC2633

Unit name Relay Output Units Model NX-OC2633
Number of points 2 points, independent contacts External
connection
terminals Screwless clamping terminal block (8
terminals)
I/O refreshing
method Free-Run refreshing
Indicators TS indicator,
output indicator
Relay type N.O. contact
Maximum
switching capacity 250 VAC/2 A (cosφ = 1),
250 VAC/2 A (cosφ = 0.4),
24 VDC/2 A, 4 A/Unit
Minimum
switching capacity 5 VDC, 1 mA
Relay service life Electrical: 100,000 operations *
Mechanical: 20,000,000 operations ON/OFF response
time 15 ms max./15 ms max.
Dimensions 12 (W) x 100 (H) x 71 (D) Isolation method Relay isolation
Insulation
resistance Between A1/B1 terminals and A3/B3
terminals: 20 MΩ min. (500 VDC)
Between the external terminals and
internal circuits: 20 MΩ min. (500
VDC)
Between the internal circuit and GR
terminal: 20 MΩ min. (100 VDC)
Between the external terminals and
GR terminal: 20 MΩ min. (500 VDC) Dielectric
strength Between A1/B1 terminals and A3/B3
terminals: 2300 VAC for 1 min at a
leakage current of 5 mA max.
Between the external terminals and
GR terminal: 2300 VAC for 1 min at a
leakage current of 5 mA max.
Between the external terminals and
internal circuits: 2300 VAC for 1 min
at a leakage current of 5 mA max.
Between the internal circuit and GR
terminal: 510 VAC for 1 min at a
leakage current of 5 mA max.
Vibration
resistance Conforms to IEC60068-2-6.
5 to 8.4 Hz with amplitude of 3.5 mm,
8.4 to 150 Hz, acceleration of 9.8
m/s²
100 min each in X, Y, and Z
directions
(10 sweeps of 10 min each = 100 min
total) Shock resistance 100 m/s², 3 times each in X, Y, and
Z directions
I/O power supply
method Supply from external source Current capacity
of I/O power
supply terminal Without I/O power supply terminals
NX Unit power
consumption • Connected to a CPU Unit or
Communication Control Unit
1.20 W max.
• Connected to a Communications
Coupler Unit
0.80 W max. I/O current
consumption No consumption
Weight 65 g max.
Circuit layout
You cannot replace the relay.
Installation
orientation and
restrictions Installation orientation:
• Connected to a CPU Unit or Communication Control Unit: Possible in upright installation.
• Connected to a Communications Coupler Unit: Possible in 6 orientations.
Restrictions: No restrictions
Terminal
connection
diagram
Disconnection/
Short-circuit
detection Not supported. Protective
function Not supported.

* Electrical service life will vary depending on the current value. Refer to "NX-series Digital I/O Units User’s Manual" for details.

NX-OC2733

Unit name Relay Output Unit Model NX-OC2733
Number of points 2 points, independent contacts External
connection
terminals Screwless clamping terminal block (8
terminals)
I/O refreshing
method Free-Run refreshing
Indicators TS indicator,
output indicator
Maximum
switching capacity 250 VAC/2 A (cosφ = 1),
250 VAC/2 A (cosφ = 0.4),
24 VDC/2 A,
4 A/Unit
Minimum
switching capacity 5 VDC, 10 mA
Relay service life Electrical: 100,000 operations
Mechanical: 20,000,000 operations ON/OFF response
time 15 ms max./15 ms max.
Dimensions 12 (W) x 100 (H) x 71 (D) Isolation method Relay isolation
Insulation
resistance Between A1/3, B1/3 terminals and
A5/7, B5/7 terminals: 20 MΩ min.
(at 500 VDC)
Between the external terminals and
functional ground terminal: 20 MΩ
min. (at 500 VDC)
Between the external terminals and
internal circuits: 20 MΩ min. (at 500
VDC)
Between the internal circuit and the
functional ground terminal: 20 MΩ
min. (at 100 VDC) Dielectric
strength Between A1/3, B1/3 terminals and
A5/7, B5/7 terminals: 2300 VAC for
1 min at a leakage current of 5 mA
max.
Between the external terminals and
the functional ground terminal: 2300
VAC for 1 min at a leakage current
of 5 mA max.
Between the external terminals and
internal circuits: 2300 VAC for 1 min
at a leakage current of 5 mA max.
Between the internal circuit and the
functional ground terminal: 510 VAC
for 1 min at a leakage current of 5
mA max.
I/O power supply
method Supply from external source Current capacity
of I/O power
supply terminal Without I/O power supply terminals
NX Unit power
consumption • Connected to a CPU Unit or
Communication Control Unit
1.30 W max.
• Connected to a Communications
Coupler Unit
0.95 W max. Current
consumption from
I/O power supply No consumption
Weight 70 g max.
Circuit layout
NO0 and NO1 are normal open contacts, and NC0 and NC1 are normal close contacts.
You cannot replace the relay.
Installation
orientation and
restrictions Installation orientation:
• Connected to a CPU Unit or Communication Control Unit: Possible in upright installation.
• Connected to a Communications Coupler Unit: Possible in 6 orientations.
Restrictions: No restrictions
Terminal
connection
diagram
Disconnection/
Short-circuit
detection Not supported. Protective
function Not supported.

Relay Output Unit (Screwless Clamping Terminal Block, 24 mm Width)
NX-OC4633

Unit name Relay Output Unit Model NX-OC4633
Number of points 8 points, independent contacts External
connection
terminals Screwless clamping terminal block
(8 terminals x 2)
I/O refreshing
method Free-Run refreshing
Indicators TS indicator,
output indicator
Relay type N.O. contact
Maximum
switching capacity 250 VAC/2 A (cosφ = 1),
250 VAC/2 A (cosφ = 0.4),
24 VDC/2 A,
8 A/Unit
Minimum
switching capacity 5 VDC, 1 mA
Relay service life Electrical: 100,000 operations*
Mechanical: 20,000,000 operations ON/OFF response
time 15 ms max./15 ms max.
Dimensions 24 (W) x 100 (H) x 71 (D) Isolation method Relay isolation
Insulation
resistance Between output bits: 20 MΩ min.
(at 500 VDC)
Between the external terminals
and the functional ground terminal:
20 MΩ min. (at 500 VDC)
Between the external terminals and
internal circuits: 20 MΩ min.
(at 500 VDC)
Between the internal circuit and the
functional ground terminal: 20 MΩ
min. (at 100 VDC) Dielectric
strength Between output bits: 2300 VAC for
1 min at a leakage current of 5 mA
max.
Between the external terminals and
the functional ground terminal: 2300
VAC for 1 min at a leakage current
of 5 mA max.
Between the external terminals and
internal circuits: 2300 VAC for 1 min
at a leakage current of 5 mA max.
Between the internal circuit and the
functional ground terminal: 510 VAC
for 1 min at a leakage current of 5 mA
max.
Vibration
resistance Conforms to IEC 60068-2-6.
5 to 8.4 Hz with amplitude of 3.5 mm,
8.4 to 150 Hz, acceleration of 9.8 m/s²
100 min each in X, Y, and Z directions
(10 sweeps of 10 min each = 100 min
total) Shock resistance 100 m/s², 3 times each in X, Y, and Z
directions
I/O power supply
method Supply from external source Current capacity
of I/O power
supply terminal Without I/O power supply terminals
NX Unit power
consumption • Connected to a CPU Unit or
Communication Control Unit
2.00 W max.
• Connected to a Communications
Coupler Unit
1.65 W max. Current
consumption from
I/O power supply No consumption
Weight 140 g max.
Circuit layout
Installation
orientation and
restrictions Installation orientation:
• Connected to a CPU Unit or Communication Control Unit: Possible in upright installation.
• Connected to a Communications Coupler Unit: Possible in 6 orientations.
Restrictions: As shown in the following.
Terminal
connection
diagram

* Electrical service life will vary depending on the current value. Refer to "NX-series Digital I/O Units User’s Manual" for details.

DC Input/Transistor Output Unit (MIL Connector, 30 mm Width)
NX-MD6121-5

Unit name DC Input/Transistor Output
Unit Model NX-MD6121-5
Number of points 16 inputs/16 outputs External connection
terminals 2 MIL connectors (20 terminals)
I/O refreshing method Switching Synchronous I/O refreshing and Free-Run refreshing
Output
section
(CN1) Internal I/O
common NPN Input
section
(CN2) Internal I/O
common For both NPN/PNP
Rated voltage 12 to 24 VDC Rated input
voltage 24 VDC (15 to 28.8 VDC)
Operating load
voltage range 10.2 to 28.8 VDC Input current 7 mA typical (at 24 VDC)
Maximum value
of load current 0.5 A/point, 2 A/Unit ON voltage/
ON current 15 VDC min./3 mA min.
(between COM and each signal)
Maximum
inrush current 4.0 A/point, 10 ms max. OFF voltage/
OFF current 5 VDC max./1 mA max.
(between COM and each signal)
Leakage
current 0.1 mA max. ON/OFF
response time 20 μs max./400 μs max.
Residual
voltage 1.5 V max. Input filter
time No filter, 0.25 ms, 0.5 ms, 1 ms
(default), 2 ms, 4 ms, 8 ms,
16 ms, 32 ms, 64 ms, 128 ms,
256 ms
ON/OFF
response time 0.1 ms max./0.8 ms max.
Indicators TS indicator, I/O indicators
Dimensions 30 (W) x 100 (H) x 71 (D)
Isolation method Photocoupler isolation
Insulation resistance 20 MΩ min. between isolated
circuits (at 100 VDC)
Dielectric strength 510 VAC between isolated
circuits for 1 minute at a
leakage current of 5 mA max.
I/O power supply
method Supply from external source
Current capacity of
I/O power supply
terminal Without I/O power supply
terminals
NX Unit power
consumption • Connected to a CPU Unit or
Communication Control Unit
1.00 W max.
• Connected to a Communica-
tions Coupler Unit
0.70 W max.
Current consumption
from I/O power supply 30 mA max.
Weight 105 g max.
Circuit layout
Installation orientation
and restrictions Installation orientation:
• Connected to a CPU Unit or Communication Control Unit: Possible in upright installation.
• Connected to a Communications Coupler Unit: Possible in 6 orientations.
Restrictions: As shown in the following.
Terminal connection
diagram
Disconnection/Short-
circuit detection Not supported. Protective function Not supported.

NX-MD6256-5

Unit name DC Input/Transistor Output
Unit Model NX-MD6256-5
Number of points 16 inputs/16 outputs External connection
terminals 2 MIL connectors (20 terminals)
I/O refreshing method Switching Synchronous I/O refreshing and Free-Run refreshing
Output
section
(CN1) Internal I/O
common PNP Input
section
(CN2) Internal I/O
common For both NPN/PNP
Rated voltage 24 VDC Rated input
voltage 24 VDC (15 to 28.8 VDC)
Operating load
voltage range 20.4 to 28.8 VDC Input current 7 mA typical (at 24 VDC)
Maximum value
of load current 0.5 A/point, 2 A/Unit ON voltage/
ON current 15 VDC min./3 mA min.
(between COM and each signal)
Maximum
inrush current 4.0 A/point, 10 ms max. OFF voltage/
OFF current 5 VDC max./1 mA max.
(between COM and each signal)
Leakage
current 0.1 mA max. ON/OFF
response time 20 μs max./400 μs max.
Residual
voltage 1.5 V max. Input filter
time No filter, 0.25 ms, 0.5 ms, 1 ms
(default), 2 ms, 4 ms, 8 ms,
16 ms, 32 ms, 64 ms, 128 ms,
256 ms
ON/OFF
response time 0.5 ms max./1.0 ms max.
Indicators TS indicator, I/O indicators
Dimensions 30 (W) x 100 (H) x 71 (D)
Isolation method Photocoupler isolation
Insulation resistance 20 MΩ min. between isolated
circuits (at 100 VDC)
Dielectric strength 510 VAC between isolated
circuits for 1 minute at a
leakage current of 5 mA max.
I/O power supply
method Supply from external source
Current capacity of
I/O power supply
terminal Without I/O power supply
terminals
NX Unit power
consumption • Connected to a CPU Unit or
Communication Control Unit
1.10 W max.
• Connected to a Communica-
tions Coupler Unit
0.75 W max.
Current consumption
from I/O power supply 40 mA max.
Weight 110 g max.
Circuit layout
Installation orientation
and restrictions Installation orientation:
• Connected to a CPU Unit or Communication Control Unit: Possible in upright installation.
• Connected to a Communications Coupler Unit: Possible in 6 orientations.
Restrictions: As shown in the following.
Terminal connection
diagram
Disconnection/Short-
circuit detection Not supported. Protective function With load short-circuit
protection.

DC Input/Transistor Output Unit (Fujitsu Connector, 30 mm Width)
NX-MD6121-6

Unit name DC Input/Transistor Output Unit Model NX-MD6121-6
Number of points 16 inputs/16 outputs External connection
terminals 2 Fujitsu connectors
(24 terminals)
I/O refreshing method Switching Synchronous I/O refreshing and Free-Run refreshing
Output
section
(CN1) Internal I/O
common NPN Input
section
(CN2) Internal I/O
common For both NPN/PNP
Rated voltage 12 to 24 VDC Rated input
voltage 24 VDC (15 to 28.8 VDC)
Operating load
voltage range 10.2 to 28.8 VDC Input current 7 mA typical (at 24 VDC)
Maximum value
of load current 0.5 A/point, 2 A/Unit ON voltage/
ON current 15 VDC min./3 mA min.
(between COM and each signal)
Maximum
inrush current 4.0 A/point, 10 ms max. OFF voltage/
OFF current 5 VDC max./1 mA max.
(between COM and each signal)
Leakage
current 0.1 mA max. ON/OFF
response time 20 μs max./400 μs max.
Residual
voltage 1.5 V max. Input filter
time No filter, 0.25 ms, 0.5 ms, 1 ms
(default), 2 ms, 4 ms, 8 ms,
16 ms, 32 ms, 64 ms, 128 ms,
256 ms
ON/OFF
response time 0.1 ms max./0.8 ms max.
Indicators TS indicator, I/O indicators
Dimensions 30 (W) x 100 (H) x 71 (D)
Isolation method Photocoupler isolation
Insulation resistance 20 MΩ min. between isolated
circuits (at 100 VDC)
Dielectric strength 510 VAC between isolated
circuits for 1 minute at a
leakage current of 5 mA max.
I/O power supply
method Supply from external source
Current capacity of
I/O power supply
terminal Without I/O power supply
terminals
NX Unit power
consumption • Connected to a CPU Unit or
Communication Control Unit
1.00 W max.
• Connected to a Communi-
cations Coupler Unit
0.70 W max.
Current consumption
from I/O power supply 30 mA max.
Weight 95 g max.
Circuit layout
Installation orientation
and restrictions Installation orientation:
• Connected to a CPU Unit or Communication Control Unit: Possible in upright installation.
• Connected to a Communications Coupler Unit: Possible in 6 orientations.
Restrictions: As shown in the following.
Terminal connection
diagram
Disconnection/Short-
circuit detection Not supported. Protective function Not supported.

Version Information
Connected to a CPU Unit

Refer to the user's manual for the CPU Unit for details on the CPU Units to which NX Units can be connected.

NX Unit Corresponding unit versions/versions
Model Unit version CPU Unit Sysmac Studio
NX-ID3317 Ver.1.0 Ver.1.13 Ver.1.17
NX-ID3343
NX-ID3344
NX-ID3417
NX-ID3443
NX-ID3444
NX-ID4342
NX-ID4442
NX-ID5142-1
NX-ID5142-5
NX-ID5342
NX-ID5442
NX-ID6142-5
NX-ID6142-6
NX-IA3117
NX-OD2154
NX-OD2258
NX-OD3121
NX-OD3153
NX-OD3256
NX-OD3257
NX-OD3268
NX-OD4121
NX-OD4256
NX-OD5121
NX-OD5121-1
NX-OD5121-5
NX-OD5256
NX-OD5256-1
NX-OD5256-5
NX-OD6121-5
NX-OD6121-6
NX-OD6256-5
NX-OC2633
NX-OC2733
NX-OC4633
NX-MD6121-5
NX-MD6121-6
NX-MD6256-5

Note: Some Units do not have all of the versions given in the above table. If a Unit does not have the specified version,
support is provided by the oldest available version after the specified version. Refer to the user’s manuals for the
specific Units for the relation between models and versions.

Connected to an EtherCAT Coupler Unit

NX Unit Corresponding unit versions/versions
Model Unit version EtherCAT Coupler Unit CPU Unit or Industrial PC Sysmac Studio
NX-ID3317 Ver.1.0 Ver.1.0 Ver.1.05 Ver.1.06
NX-ID3343
NX-ID3344 Ver.1.1 Ver.1.06 * Ver.1.07
NX-ID3417 Ver.1.0 Ver.1.05 Ver.1.06
NX-ID3443
NX-ID3444 Ver.1.1 Ver.1.06 * Ver.1.07
NX-ID4342 Ver.1.0 Ver.1.05 Ver.1.06
NX-ID4442
NX-ID5142-1 Ver.1.13
NX-ID5142-5 Ver.1.10
NX-ID5342 Ver.1.06
NX-ID5442
NX-ID6142-5 Ver.1.10
NX-ID6142-6 Ver.1.13
NX-IA3117 Ver.1.08
NX-OD2154 Ver.1.0 Ver.1.1 Ver.1.06 * Ver.1.07
NX-OD2258
NX-OD3121 Ver.1.0 Ver.1.05 Ver.1.06
NX-OD3153
NX-OD3256
NX-OD3257
NX-OD3268 Ver.1.13
NX-OD4121 Ver.1.06
NX-OD4256
NX-OD5121
NX-OD5121-1 Ver.1.13
NX-OD5121-5 Ver.1.10
NX-OD5256 Ver.1.06
NX-OD5256-1 Ver.1.13
NX-OD5256-5 Ver.1.10
NX-OD6121-5
NX-OD6121-6 Ver.1.13
NX-OD6256-5 Ver.1.10
NX-OC2633 Ver.1.06
NX-OC2733 Ver.1.08
NX-OC4633 Ver.1.17
NX-MD6121-5 Ver.1.0 Ver.1.0 Ver.1.05 Ver.1.10
NX-MD6121-6 Ver.1.13
NX-MD6256-5 Ver.1.10

Note: Some Units do not have all of the versions given in the above table. If a Unit does not have the specified version,
support is provided by the oldest available version after the specified version. Refer to the user’s manuals for the
specific Units for the relation between models and versions.
* The instructions for time stamp refreshing are supported by CPU Units with unit version 1.06 or later. If you do not use
instructions for time stamp refreshing, you can use version 1.05. Refer to the NJ/NX-series Instructions Reference Manual
(Cat. No. W502) for details on the instructions for time stamp refreshing.

Connected to an EtherNet/IP Coupler Unit

NX Unit Corresponding unit versions/versions
Model Unit
version Application with an NJ/NX/NY-series
Controller *1 Application with a CS/CJ/CP-series PLC
*2
EtherNet/IP
Coupler Unit CPU Unit or
Industrial PC Sysmac
Studio EtherNet/IP
Coupler Unit Sysmac
Studio NX-IO
Configurator *3
NX-ID3317 Ver. 1.0 Ver. 1.2 Ver. 1.14 Ver. 1.19 Ver. 1.0 Ver. 1.10 Ver. 1.00
NX-ID3343
NX-ID3344 --- --- --- --- --- ---
NX-ID3417 Ver. 1.2 Ver. 1.14 Ver. 1.19 Ver. 1.0 Ver. 1.10 Ver. 1.00
NX-ID3443
NX-ID3444 --- --- --- --- --- ---
NX-ID4342 Ver. 1.2 Ver. 1.14 Ver. 1.19 Ver. 1.0 Ver. 1.10 Ver. 1.00
NX-ID4442
NX-ID5142-1 Ver. 1.13
NX-ID5142-5 Ver. 1.10
NX-ID5342
NX-ID5442
NX-ID6142-5
NX-ID6142-6 Ver. 1.13
NX-IA3117 Ver. 1.10
NX-OD2154 --- --- --- --- --- ---
NX-OD2258
NX-OD3121 Ver. 1.2 Ver. 1.14 Ver. 1.19 Ver. 1.0 Ver. 1.10 Ver. 1.00
NX-OD3153
NX-OD3256
NX-OD3257
NX-OD3268 Ver. 1.13
NX-OD4121 Ver. 1.10
NX-OD4256
NX-OD5121
NX-OD5121-1 Ver. 1.13
NX-OD5121-5 Ver. 1.10
NX-OD5256
NX-OD5256-1 Ver. 1.13
NX-OD5256-5 Ver. 1.10
NX-OD6121-5
NX-OD6121-6 Ver. 1.13
NX-OD6256-5 Ver. 1.10
NX-OC2633
NX-OC2733
NX-OC4633 Ver. 1.17
NX-MD6121-5 Ver. 1.10
NX-MD6121-6 Ver. 1.13
NX-MD6256-5 Ver. 1.10

Note: 1. Some Units do not have all of the versions given in the above table. If a Unit does not have the specified version,
support is provided by the oldest available version after the specified version. Refer to the user’s manuals for the
specific Units for the relation between models and versions.
2. Note: You cannot connect the relevant NX Unit to the target Communications Coupler Unit if “---” is shown in the
corresponding unit versions/versions column.
*1 Refer to the user’s manual for the EtherNet/IP Coupler Units for information on the unit versions of EtherNet/IP Units
that are compatible with EtherNet/IP Coupler Units.
*2 Refer to the user’s manual for the EtherNet/IP Coupler Units for information on the unit versions of CPU Units and
EtherNet/IP Units that are compatible with EtherNet/IP Coupler Units.
*3 For connection to an EtherNet/IP Coupler Unit with unit version 1.0, connection is supported only for a connection to the
peripheral USB port on the EtherNet/IP Coupler Unit. You cannot connect by any other path. If you need to connect by
another path, use an EtherNet/IP Coupler Unit with unit version 1.2 or later.

Connected to Communication Control Units

NX Unit Corresponding unit versions/versions
Model Unit version Communication Control Unit Sysmac Studio
NX-ID3317 Ver. 1.0 Ver. 1.00 Ver. 1.24
NX-ID3343
NX-ID3344 --- ---
NX-ID3417 Ver. 1.00 Ver. 1.24
NX-ID3443
NX-ID3444 Ver. 1.0 --- ---
NX-ID4342 Ver. 1.00 Ver. 1.24
NX-ID4442
NX-ID5142-1
NX-ID5142-5
NX-ID5342
NX-ID5442
NX-ID6142-5
NX-ID6142-6
NX-IA3117
NX-OD2154 --- ---
NX-OD2258
NX-OD3121 Ver. 1.00 Ver. 1.24
NX-OD3153
NX-OD3256
NX-OD3257
NX-OD3268
NX-OD4121
NX-OD4256
NX-OD5121
NX-OD5121-1
NX-OD5121-5
NX-OD5256
NX-OD5256-1
NX-OD5256-5
NX-OD6121-5
NX-OD6121-6
NX-OD6256-5
NX-OC2633
NX-OC2733
NX-OC4633
NX-MD6121-5
NX-MD6121-6
NX-MD6256-5

Note: 1. Some Units do not have all of the versions given in the above table. If a Unit does not have the specified version,
support is provided by the oldest available version after the specified version. Refer to the user’s manuals for the
specific Units for the relation between models and versions.
2. Note: You cannot connect the relevant NX Unit to the Communication Control Unit if “---” is shown in the
corresponding unit versions/ versions column.

last update: August 1, 2018

NO. NX-ID / IA / OD / OC / MD

TYPE:Machine Automation Controllers NX-series I/O System Digital Input / Output Unit

DATE:2021-06-10

Associated products:
NX-V680C NX-series RFID Units/Features NX-HAD[][][] NX-series High-speed Analog Input Unit/Features

For ordering in Singapore, please note some product models not sold in Singapore may be included in the following catalog(s) for our global customers.
*It is recommended to select “Save” from the right-click due to large size of catalog PDF data.
Catalog Name	Catalog Number [size]	Last Update
NX-ID/IA/OD/OC/MD Data Sheet	- [11436KB]	Aug 01, 201820180801	NX-ID/IA/OD/OC/MD Data Sheet
NX-series I/O System Catalog	R183-E1-09 [6683KB]	Nov 01, 201820181101	NX-series I/O System Catalog
XW2R Series Catalog	G077-E1-03 [21666KB]	Apr 02, 201820180402	XW2R Series Catalog
XW2Z-R Data Sheet	G126-E1-02 [2435KB]	Apr 03, 201720170403	XW2Z-R Data Sheet
G70[]/G7TC Table of I/O Relay Terminal and connectable device combinations	J217-E1-02 [1206KB]	Jun 01, 201820180601	G70[]/G7TC Table of I/O Relay Terminal and connectable device combinations
XW2 Series Table of Connector-Terminal Block Conversion Units and connectable device combinations	G129-E1-02 [950KB]	Jun 01, 201820180601	XW2 Series Table of Connector-Terminal Block Conversion Units and connectable device combinations

Product Name	Specification	Model
Number of points	Internal I/O common	Rated input voltage	I/O refreshing method	ON/OFF response time
DC Input Unit (Screwless Clamping Terminal Block, 12 mm Width)	4 points	NPN	12 to 24 VDC	Switching Synchronous I/O refreshing and Free-Run refreshing	20 μs max./ 400 μs max.	NX-ID3317
24 VDC	100 ns max./ 100 ns max.	NX-ID3343
Input refreshing with input changed time only *1	NX-ID3344
PNP	12 to 24 VDC	Switching Synchronous I/O refreshing and Free-Run refreshing	20 μs max./ 400 μs max.	NX-ID3417
24 VDC	Input refreshing with input changed time only *1	100 ns max./ 100 ns max.	NX-ID3443
NX-ID3444
8 points	NPN	Switching Synchronous I/O refreshing and Free-Run refreshing	20 μs max./ 400 μs max.	NX-ID4342
PNP	NX-ID4442
16 points	NPN	NX-ID5342
PNP	NX-ID5442
DC Input Unit (M3 Screw Terminal Block, 30 mm Width)	16 points	For both NPN/PNP	24 VDC	Switching Synchronous I/O refreshing and Free-Run refreshing	20 μs max./ 400 μs max.	NX-ID5142-1
DC Input Unit (MIL Connector, 30 mm Width)	16 points	For both NPN/PNP	24 VDC	Switching Synchronous I/O refreshing and Free-Run refreshing	20 μs max./ 400 μs max.	NX-ID5142-5
32 points	NX-ID6142-5
DC Input Unit (Fujitsu Connector, 30 mm Width)	32 points	For both NPN/PNP	24 VDC	Switching Synchronous I/O refreshing and Free-Run refreshing	20 μs max./ 400 μs max.	NX-ID6142-6
AC Input Unit (Screwless Clamping Terminal Block, 12 mm Width)	4 points	200 to 240 VAC, 50/60 Hz (170 to 264 VAC, ±3 Hz)	Free-Run refreshing	10 ms max./ 40 ms max.	NX-IA3117

Product Name	Specification	Model
Number of points	Internal I/O common	Maximum value of load current	Rated voltage	I/O refreshing method	ON/OFF response time
Transistor Output Unit (Screwless Clamping Terminal Block, 12 mm Width)	2	NPN	0.5 A/point, 1 A/Unit	24 VDC	Output refreshing with specified time stamp only *1	300 ns max./ 300 ns max.	NX-OD2154
PNP	NX-OD2258
4	NPN	0.5 A/point, 2 A/Unit	12 to 24 VDC	Switching Synchronous I/O refreshing and Free-Run refreshing	0.1 ms max./ 0.8 ms max.	NX-OD3121
24 VDC	300 ns max./ 300 ns max.	NX-OD3153
PNP	0.5 ms max./ 1.0 ms max.	NX-OD3256
300 ns max./ 300 ns max.	NX-OD3257
2 A/point, 8 A/Unit	0.5 ms max./ 1.0 ms max.	NX-OD3268
8	NPN	0.5 A/point, 4 A/Unit	12 to 24 VDC	0.1 ms max./ 0.8 ms max.	NX-OD4121
PNP	24 VDC	0.5 ms max./ 1.0 ms max.	NX-OD4256
16	NPN	12 to 24 VDC	0.1 ms max./ 0.8 ms max.	NX-OD5121
PNP	24 VDC	0.5 ms max./ 1.0 ms max.	NX-OD5256
Transistor Output Unit (M3 Screw Terminal Block, 30 mm Width)	16	NPN	0.5 A/point, 5 A/Unit	12 to 24 VDC	Switching Synchronous I/O refreshing and Free-Run refreshing	0.1 ms max./ 0.8 ms max.	NX-OD5121-1
PNP	24 VDC	0.5 ms max./ 1.0 ms max.	NX-OD5256-1
Transistor Output Unit (MIL Connector, 30 mm Width)	16	NPN	0.5 A/point, 2 A/Unit	12 to 24 VDC	Switching Synchronous I/O refreshing and Free-Run refreshing	0.1 ms max./ 0.8 ms max.	NX-OD5121-5
PNP	24 VDC	0.5 ms max./ 1.0 ms max.	NX-OD5256-5
32	NPN	0.5 A/point, 2 A/common, 4 A/Unit	12 to 24 VDC	0.1 ms max./ 0.8 ms max.	NX-OD6121-5
PNP	24 VDC	0.5 ms max./ 1.0 ms max.	NX-OD6256-5
Transistor Output Unit (Fujitsu Connector, 30 mm Width)	32	NPN	0.5 A/point, 2 A/common, 4 A/Unit	12 to 24 VDC	Switching Synchronous I/O refreshing and Free-Run refreshing	0.1 ms max./ 0.8 ms max.	NX-OD6121-6
Relay Output Unit (Screwless Clamping Terminal Block, 12 mm Width/ 24 mm Width)	2	Relay type: N.O.	250 VAC/2 A (cosφ=1), 250 VAC/2 A (cosφ=0.4), 24 VDC/2 A, 4 A/Unit	Free-Run refreshing	15 ms max./ 15 ms max.	NX-OC2633
Relay type: N.O.+N.C.	NX-OC2733
8	Relay type: N.O.	250 VAC/2 A (cosφ=1), 250 VAC/2 A (cosφ=0.4), 24 VDC/2 A, 8 A/Unit	Free-Run refreshing	15ms max./ 15ms max.	NX-OC4633

Product Name	Specification	Model
Number of points	Internal I/O common	Maximum value of load current	I/O refreshing method	ON/OFF response time
DC Input/ Transistor Output Unit (MIL Connector, 30 mm Width)	Outputs: 16 points Inputs: 16 points	Outputs: NPN Inputs: For both NPN/PNP	Outputs: 12 to 24 VDC Inputs: 24 VDCV	Switching Synchronous I/O refreshing and Free-Run refreshing	Outputs: 0.1 ms max./ 0.8 ms max. Inputs: 20 μs max./ 400 μs max.	NX-MD6121-5
Outputs: PNP Inputs: For both NPN/PNP	Outputs: 24 VDC Inputs: 24 VDC	Outputs: 0.5 ms max./ 1.0 ms max. Inputs: 20 μs max./ 400 μs max.	NX-MD6256-5
Transistor Output Unit (Fujitsu Connector, 30 mm Width)	Outputs: 16 points Inputs: 16 points	Outputs: NPN Inputs: For both NPN/PNP	Outputs: 12 to 24 VDC Inputs: 24 VDC	Switching Synchronous I/O refreshing and Free-Run refreshing	Outputs: 0.1 ms max./ 0.8 ms max. Inputs: 20 μs max./ 400 μs max.	NX-MD6121-6

Product name	Specification	Model	Standards
Unit/Terminal Block Coding Pins	For 10 Units (Terminal Block: 30 pins, Unit: 30 pins)	NX-AUX02	-

Product name	Specification	Model	Standards
No. of terminals	Terminal number indications	Ground terminal mark	Terminal current capacity
Terminal Block	8	A/B	None	10 A	NX-TBA082	---
12	NX-TBA122
16	NX-TBA162

Item	Specification
Enclosure	Mounted in a panel
Grounding method	Ground to 100 Ω or less
Operating environment	Ambient operating temperature	0 to 55°C
Ambient operating humidity	10% to 95% (with no condensation or icing)
Atmosphere	Must be free from corrosive gases.
Ambient storage temperature	-25 to 70°C (with no condensation or icing)
Altitude	2,000 m max.
Pollution degree	2 or less: Conforms to JIS B3502 and IEC 61131-2.
Noise immunity	2 kV on power supply line (Conforms to IEC61000-4-4.)
Overvoltage category	Category II: Conforms to JIS B3502 and IEC 61131-2.
EMC immunity level	Zone B
*Vibration resistance 1**	Conforms to IEC 60068-2-6. 5 to 8.4 Hz with 3.5-mm amplitude, 8.4 to 150 Hz, acceleration of 9.8 m/s², 100 min each in X, Y, and Z directions (10 sweeps of 10 min each = 100 min total)
*Shock resistance 1**	Conforms to IEC 60068-2-27. 147 m/s², 3 times each in X, Y, and Z directions
*Applicable standards 2**	cULus: Listed (UL508) or Listed (UL 61010-2-201), ANSI/ISA 12.12.01, EU: EN 61131-2 or EN 61010-2-201, C-Tick or RCM, KC: KC Registration, NK, LR

Unit name	DC Input Unit	Model	NX-ID3317
Number of points	4 points	External connection terminals	Screwless clamping terminal block (12 terminals)
I/O refreshing method	Selectable Synchronous I/O refreshing or Free-Run refreshing
Indicators	TS indicator, input indicator	Internal I/O common	NPN
Rated input voltage	12 to 24 VDC (9 to 28.8 VDC)
Input current	6 mA typical (at 24 VDC), rated current
ON voltage/ON current	9 VDC min./3 mA min. (between IOV and each signal)
OFF voltage/OFF current	2 VDC max./1 mA max. (between IOV and each signal)
ON/OFF response time	20 μs max./400 μs max.
Input filter time	Without filter, 0.25 ms, 0.5 ms, 1 ms (factory setting), 2 ms, 4 ms, 8 ms, 16 ms, 32 ms, 64 ms, 128 ms, 256 ms
Dimensions	12 (W) x 100 (H) x 71 (D)	Isolation method	Photocoupler isolation
Insulation resistance	20 MΩ min. between isolated circuits (at 100 VDC)	Dielectric strength	510 VAC between isolated circuits for 1 minute at a leakage current of 5 mA max.
I/O power supply method	Supply from the NX bus	Current capacity of I/O power supply terminal	IOV: 0.1 A/terminal max., IOG: 0.1 A/terminal max.
NX Unit power consumption	• Connected to a CPU Unit or Communication Control Unit 0.90 W max. • Connected to a Communi- cations Coupler Unit 0.50 W max.	Current consumption from I/O power supply	No consumption
Weight	65 g max.
Circuit layout
Installation orientation and restrictions	Installation orientation: • Connected to a CPU Unit or Communication Control Unit: Possible in upright installation. • Connected to a Communications Coupler Unit: Possible in 6 orientations. Restrictions: No restrictions
Terminal connection diagram
Disconnection/ Short-circuit detection	Not supported.	Protective function	Not supported.

Unit name	DC Input Unit	Model	NX-ID3343
Number of points	4 points	External connection terminals	Screwless clamping terminal block (12 terminals)
I/O refreshing method	Selectable Synchronous I/O refreshing or Free-Run refreshing
Indicators	TS indicator, input indicator	Internal I/O common	NPN
Rated input voltage	24 VDC (15 to 28.8 VDC)
Input current	3.5 mA typical (at 24 VDC), rated current
ON voltage/ON current	15 VDC min./3 mA min. (between IOV and each signal)
OFF voltage/OFF current	5 VDC max./1 mA max. (between IOV and each signal)
ON/OFF response time	100 ns max./100 ns max.
Input filter time	Without filter, 1 μs, 2 μs, 4 μs, 8 μs (factory setting), 16 μs, 32 μs, 64 μs, 128 μs, 256 μs
Dimensions	12 (W) x 100 (H) x 71 (D)	Isolation method	Digital isolator isolation
Insulation resistance	20 MΩ min. between isolated circuits (at 100 VDC)	Dielectric strength	510 VAC between isolated circuits for 1 minute at a leakage current of 5 mA max.
I/O power supply method	Supply from the NX bus	Current capacity of I/O power supply terminal	IOV: 0.1 A/terminal max., IOG: 0.1 A/terminal max.
NX Unit power consumption	• Connected to a CPU Unit or Communication Control Unit 0.90 W max. • Connected to a Communi- cations Coupler Unit 0.55 W max.	Current consumption from I/O power supply	30 mA max.
Weight	65 g max.
Circuit layout
Installation orientation and restrictions	Installation orientation: • Connected to a CPU Unit or Communication Control Unit: Possible in upright installation. • Connected to a Communications Coupler Unit: Possible in 6 orientations. Restrictions: No restrictions
Terminal connection diagram
Disconnection/ Short-circuit detection	Not supported.	Protective function	Not supported.

Unit name	DC Input Unit	Model	NX-ID3344
Number of points	4 points	External connection terminals	Screwless clamping terminal block (12 terminals)
I/O refreshing method	Input refreshing with input changed time
Indicators	TS indicator, input indicator	Internal I/O common	NPN
Rated input voltage	24 VDC (15 to 28.8 VDC)
Input current	3.5 mA typical (at 24 VDC), rated current
ON voltage/ON current	15 VDC min./3 mA min. (between IOV and each signal)
OFF voltage/OFF current	5 VDC max./1 mA max. (between IOV and each signal)
ON/OFF response time	100 ns max./100 ns max.
Input filter time	No filter *
Dimensions	12 (W) x 100 (H) x 71 (D)	Isolation method	Digital isolator isolation
Insulation resistance	20 MΩ min. between isolated circuits (at 100 VDC)	Dielectric strength	510 VAC between isolated circuits for 1 minute at a leakage current of 5 mA max.
I/O power supply method	Supply from the NX bus	Current capacity of I/O power supply terminal	IOV: 0.1 A/terminal max., IOG: 0.1 A/terminal max.
NX Unit power consumption	• Connected to a CPU Unit 0.90 W max. • Connected to a Communi- cations Coupler Unit 0.50 W max.	Current consumption from I/O power supply	30 mA max.
Weight	65 g max.
Circuit layout
Installation orientation and restrictions	Installation orientation: • Connected to a CPU Unit: Possible in upright installation. • Connected to a Communications Coupler Unit: Possible in 6 orientations. Restrictions: No restrictions
Terminal connection diagram
Disconnection/ Short-circuit detection	Not supported.	Protective function	Not supported.

Unit name	DC Input Unit	Model	NX-ID3417
Number of points	4 points	External connection terminals	Screwless clamping terminal block (12 terminals)
I/O refreshing method	Selectable Synchronous I/O refreshing or Free-Run refreshing
Indicators	TS indicator, input indicator	Internal I/O common	PNP
Rated input voltage	12 to 24 VDC (9 to 28.8 VDC)
Input current	6 mA typical (at 24 VDC), rated current
ON voltage/ON current	9 VDC min./3 mA min. (between IOG and each signal)
OFF voltage/OFF current	2 VDC max./1 mA max. (between IOG and each signal)
ON/OFF response time	20 μs max./400 μs max.
Input filter time	Without filter, 0.25 ms, 0.5 ms, 1 ms (factory setting), 2 ms, 4 ms, 8 ms, 16 ms, 32 ms, 64 ms, 128 ms, 256 ms
Dimensions	12 (W) x 100 (H) x 71 (D)	Isolation method	Photocoupler isolation
Insulation resistance	20 MΩ min. between isolated circuits (at 100 VDC)	Dielectric strength	510 VAC between isolated circuits for 1 minute at a leakage current of 5 mA max.
I/O power supply method	Supply from the NX bus	Current capacity of I/O power supply terminal	IOV: 0.1 A/terminal max., IOG: 0.1 A/terminal max.
NX Unit power consumption	• Connected to a CPU Unit or Communication Control Unit 0.90 W max. • Connected to a Communi- cations Coupler Unit 0.50 W max.	Current consumption from I/O power supply	No consumption
Weight	65 g max.
Circuit layout
Installation orientation and restrictions	Installation orientation: • Connected to a CPU Unit or Communication Control Unit: Possible in upright installation. • Connected to a Communications Coupler Unit: Possible in 6 orientations. Restrictions: No restrictions
Terminal connection diagram
Disconnection/ Short-circuit detection	Not supported.	Protective function	Not supported.

Unit name	DC Input Unit	Model	NX-ID3443
Number of points	4 points	External connection terminals	Screwless clamping terminal block (12 terminals)
I/O refreshing method	Selectable Synchronous I/O refreshing or Free-Run refreshing
Indicators	TS indicator, input indicator	Internal I/O common	PNP
Rated input voltage	24 VDC (15 to 28.8 VDC)
Input current	3.5 mA typical (at 24 VDC), rated current
ON voltage/ON current	15 VDC min./3 mA min. (between IOG and each signal)
OFF voltage/OFF current	5 VDC max./1 mA max. (between IOG and each signal)
ON/OFF response time	100 ns max./100 ns max.
Input filter time	Without filter, 1 μs, 2 μs, 4 μs, 8 μs (factory setting),16 μs, 32 μs, 64 μs, 128 μs, 256 μs
Dimensions	12 (W) x 100 (H) x 71 (D)	Isolation method	Digital isolator isolation
Insulation resistance	20 MΩ min. between isolated circuits (at 100 VDC)	Dielectric strength	510 VAC between isolated circuits for 1 minute at a leakage current of 5 mA max.
I/O power supply method	Supply from the NX bus	Current capacity of I/O power supply terminal	IOV: 0.1 A/terminal max., IOG: 0.1 A/terminal max.
NX Unit power consumption	• Connected to a CPU Unit or Communication Control Unit 0.90 W max. • Connected to a Communi- cations Coupler Unit 0.55 W max.	Current consumption from I/O power supply	30 mA max.
Weight	65 g max.
Circuit layout
Installation orientation and restrictions	Installation orientation: • Connected to a CPU Unit or Communication Control Unit: Possible in upright installation. • Connected to a Communications Coupler Unit: Possible in 6 orientations. Restrictions: No restrictions
Terminal connection diagram
Disconnection/ Short-circuit detection	Not supported.	Protective function	Not supported.

Unit name	DC Input Unit	Model	NX-ID3444
Number of points	4 points	External connection terminals	Screwless clamping terminal block (12 terminals)
I/O refreshing method	Input refreshing with input changed time
Indicators	TS indicator, input indicator	Internal I/O common	PNP
Rated input voltage	24 VDC (15 to 28.8 VDC)
Input current	3.5 mA typical (at 24 VDC), rated current
ON voltage/ON current	15 VDC min./3 mA min. (between IOG and each signal)
OFF voltage/OFF current	5 VDC max./1 mA max. (between IOG and each signal)
ON/OFF response time	100 ns max./100 ns max.
Input filter time	No filter *
Dimensions	12 (W) x 100 (H) x 71 (D)	Isolation method	Digital isolator isolation
Insulation resistance	20 MΩ min. between isolated circuits (at 100 VDC)	Dielectric strength	510 VAC between isolated circuits for 1 minute at a leakage current of 5 mA max.
I/O power supply method	Supply from the NX bus	Current capacity of I/O power supply terminal	IOV: 0.1 A/terminal max., IOG: 0.1 A/terminal max.
NX Unit power consumption	• Connected to a CPU Unit 0.90 W max. • Connected to a Communi- cations Coupler Unit 0.50 W max.	Current consumption from I/O power supply	30 mA max.
Weight	65 g max.
Circuit layout
Installation orientation and restrictions	Installation orientation: • Connected to a CPU Unit: Possible in upright installation. • Connected to a Communications Coupler Unit: Possible in 6 orientations. Restrictions: No restrictions
Terminal connection diagram
Disconnection/ Short-circuit detection	Not supported.	Protective function	Not supported.

Unit name	DC Input Unit	Model	NX-ID4342
Number of points	8 points	External connection terminals	Screwless clamping terminal block (16 terminals)
I/O refreshing method	Selectable Synchronous I/O refreshing or Free-Run refreshing
Indicators	TS indicator, input indicator	Internal I/O common	NPN
Rated input voltage	24 VDC (15 to 28.8 VDC)
Input current	3.5 mA typical (at 24 VDC), rated current
ON voltage/ON current	15 VDC min./3 mA min. (between IOG and each signal)
OFF voltage/OFF current	5 VDC max./1 mA max. (between IOG and each signal)
ON/OFF response time	20 μs max./400 μs max.
Input filter time	Without filter, 0.25 ms, 0.5 ms, 1 ms (factory setting), 2 ms, 4 ms, 8 ms, 16 ms, 32 ms, 64 ms, 128 ms, 256 ms
Dimensions	12 (W) x 100 (H) x 71 (D)	Isolation method	Photocoupler isolation
Insulation resistance	20 MΩ min. between isolated circuits (at 100 VDC)	Dielectric strength	510 VAC between isolated circuits for 1 minute at a leakage current of 5 mA max.
I/O power supply method	Supply from the NX bus	Current capacity of I/O power supply terminal	IOG: 0.1 A/terminal max.
NX Unit power consumption	• Connected to a CPU Unit or Communication Control Unit 0.90 W max. • Connected to a Communi- cations Coupler Unit 0.50 W max.	Current consumption from I/O power supply	No consumption
Weight	65 g max.
Circuit layout
Installation orientation and restrictions	Installation orientation: • Connected to a CPU Unit or Communication Control Unit: Possible in upright installation. • Connected to a Communications Coupler Unit: Possible in 6 orientations. Restrictions: No restrictions
Terminal connection diagram
Disconnection/ Short-circuit detection	Not supported.	Protective function	Not supported.

Unit name	DC Input Unit	Model	NX-ID4442
Number of points	8 points	External connection terminals	Screwless clamping terminal block (16 terminals)
I/O refreshing method	Selectable Synchronous I/O refreshing or Free-Run refreshing
Indicators	TS indicator, input indicator	Internal I/O common	PNP
Rated input voltage	24 VDC (15 to 28.8 VDC)
Input current	3.5 mA typical (at 24 VDC), rated current
ON voltage/ON current	15 VDC min./3 mA min. (between IOG and each signal)
OFF voltage/OFF current	5 VDC max./1 mA max. (between IOG and each signal)
ON/OFF response time	20 μs max./400 μs max.
Input filter time	Without filter, 0.25 ms, 0.5 ms, 1 ms (factory setting), 2 ms, 4 ms, 8 ms, 16 ms, 32 ms, 64 ms, 128 ms, 256 ms
Dimensions	12 (W) x 100 (H) x 71 (D)	Isolation method	Photocoupler isolation
Insulation resistance	20 MΩ min. between isolated circuits (at 100 VDC)	Dielectric strength	510 VAC between isolated circuits for 1 minute at a leakage current of 5 mA max.
I/O power supply method	Supply from the NX bus	Current capacity of I/O power supply terminal	IOG: 0.1 A/terminal max.
NX Unit power consumption	• Connected to a CPU Unit or Communication Control Unit 0.90 W max. • Connected to a Communi- cations Coupler Unit 0.50 W max.	Current consumption from I/O power supply	No consumption
Weight	65 g max.
Circuit layout
Installation orientation and restrictions	Installation orientation: • Connected to a CPU Unit or Communication Control Unit: Possible in upright installation. • Connected to a Communications Coupler Unit: Possible in 6 orientations. Restrictions: No restrictions
Terminal connection diagram
Disconnection/ Short-circuit detection	Not supported.	Protective function	Not supported.

Unit name	DC Input Unit	Model	NX-ID5342
Number of points	16 points	External connection terminals	Screwless clamping terminal block (16 terminals)
I/O refreshing method	Selectable Synchronous I/O refreshing or Free-Run refreshing
Indicators	TS indicator, input indicator	Internal I/O common	NPN
Rated input voltage	24 VDC (15 to 28.8 VDC)
Input current	3.5 mA typical (at 24 VDC), rated current
ON voltage/ON current	15 VDC min./2 mA min. (between IOG and each signal)
OFF voltage/OFF current	5 VDC max./0.5 mA max. (between IOG and each signal)
ON/OFF response time	20 μs max./400 μs max.
Input filter time	Without filter, 0.25 ms, 0.5 ms, 1 ms (factory setting), 2 ms, 4 ms, 8 ms, 16 ms, 32 ms, 64 ms, 128 ms, 256 ms
Dimensions	12 (W) x 100 (H) x 71 (D)	Isolation method	Photocoupler isolation
Insulation resistance	20 MΩ min. between isolated circuits (at 100 VDC)	Dielectric strength	510 VAC between isolated circuits for 1 minute at a leakage current of 5 mA max.
I/O power supply method	Supply from the NX bus	Current capacity of I/O power supply terminal	Without I/O power supply terminals
NX Unit power consumption	• Connected to a CPU Unit or Communication Control Unit 0.90 W max. • Connected to a Communi- cations Coupler Unit 0.55 W max.	Current consumption from I/O power supply	No consumption
Weight	65 g max.
Circuit layout
Installation orientation and restrictions	Installation orientation: • Connected to a CPU Unit or Communication Control Unit: Possible in upright installation. • Connected to a Communications Coupler Unit: Possible in 6 orientations. Restrictions: No restrictions
Terminal connection diagram
Disconnection/ Short-circuit detection	Not supported.	Protective function	Not supported.

Unit name	DC Input Unit	Model	NX-ID5442
Number of points	16 points	External connection terminals	Screwless clamping terminal block (16 terminals)
I/O refreshing method	Selectable Synchronous I/O refreshing or Free-Run refreshing
Indicators	TS indicator, input indicator	Internal I/O common	PNP
Rated input voltage	24 VDC (15 to 28.8 VDC)
Input current	3.5 mA typical (at 24 VDC), rated current
ON voltage/ON current	15 VDC min./2 mA min. (between IOG and each signal)
OFF voltage/OFF current	5 VDC max./0.5 mA max. (between IOG and each signal)
ON/OFF response time	20 μs max./400 μs max.
Input filter time	Without filter, 0.25 ms, 0.5 ms, 1 ms (factory setting), 2 ms, 4 ms, 8 ms, 16 ms, 32 ms, 64 ms, 128 ms, 256 ms
Dimensions	12 (W) x 100 (H) x 71 (D)	Isolation method	Photocoupler isolation
Insulation resistance	20 MΩ min. between isolated circuits (at 100 VDC)	Dielectric strength	510 VAC between isolated circuits for 1 minute at a leakage current of 5 mA max.
I/O power supply method	Supply from the NX bus	Current capacity of I/O power supply terminal	Without I/O power supply terminals
NX Unit power consumption	• Connected to a CPU Unit or Communication Control Unit 0.90 W max. • Connected to a Communi- cations Coupler Unit 0.55 W max.	Current consumption from I/O power supply	No consumption
Weight	65 g max.
Circuit layout
Installation orientation and restrictions	Installation orientation: • Connected to a CPU Unit or Communication Control Unit: Possible in upright installation. • Connected to a Communications Coupler Unit: Possible in 6 orientations. Restrictions: No restrictions
Terminal connection diagram
Disconnection/ Short-circuit detection	Not supported.	Protective function	Not supported.

Unit name	DC Input Unit	Model	NX-ID5142-1
Number of points	16 points	External connection terminals	M3 screw terminal block (18 terminals)
I/O refreshing method	Switching Synchronous I/O refreshing and Free-Run refreshing
Indicators	TS indicator, input indicator	Internal I/O common	For both NPN/PNP
Rated input voltage	24 VDC (15 to 28.8 VDC)
Input current	7 mA typical (at 24 VDC)
ON voltage/ON current	15 VDC min./3 mA min. (between COM and each signal)
OFF voltage/OFF current	5 VDC max./1 mA max. (between COM and each signal)
ON/OFF response time	20 μs max./400 μs max.
Input filter time	No filter, 0.25 ms, 0.5 ms, 1 ms (default), 2 ms, 4 ms, 8 ms, 16 ms, 32 ms, 64 ms, 128 ms, 256 ms
Dimensions	30 (W) x 100 (H) x 71 (D)	Isolation method	Photocoupler isolation
Insulation resistance	20 MΩ min. between isolated circuits (at 100 VDC)	Dielectric strength	510 VAC between isolated circuits for 1 minute at a leakage current of 5 mA max.
I/O power supply method	Supply from external source	Current capacity of I/O power supply terminal	Without I/O power supply terminals
NX Unit power consumption	• Connected to a CPU Unit or Communication Control Unit 0.85 W max. • Connected to a Communi- cations Coupler Unit 0.55 W max.	Current consumption from I/O power supply	No consumption
Weight	125 g max.
Circuit layout
Installation orientation and restrictions	Installation orientation: • Connected to a CPU Unit or Communication Control Unit: Possible in upright installation. • Connected to a Communications Coupler Unit: Possible in 6 orientations. Restrictions: As shown in the following.
Terminal connection diagram	• The polarity of the input power supply can be connected in either direction.
Disconnection/ Short-circuit detection	Not supported.	Protective function	Not supported.

Unit name	DC Input Unit	Model	NX-ID5142-5
Number of points	16 points	External connection terminals	MIL connector (20 terminals)
I/O refreshing method	Switching Synchronous I/O refreshing and Free-Run refreshing
Indicators	TS indicator, input indicators	Internal I/O common	For both NPN/PNP
Rated input voltage	24 VDC (15 to 28.8 VDC)
Input current	7 mA typical (at 24 VDC)
ON voltage/ON current	15 VDC min./3 mA min. (between COM and each signal)
OFF voltage/OFF current	5 VDC max./1 mA max. (between COM and each signal)
ON/OFF response time	20 μs max./400 μs max.
Input filter time	No filter, 0.25 ms, 0.5 ms, 1 ms (default), 2 ms, 4 ms, 8 ms, 16 ms, 32 ms, 64 ms, 128 ms, 256 ms
Dimensions	30 (W) x 100 (H) x 71 (D)	Isolation method	Photocoupler isolation
Insulation resistance	20 MΩ min. between isolated circuits (at 100 VDC)	Dielectric strength	510 VAC between isolated circuits for 1 minute at a leakage current of 5 mA max.
I/O power supply method	Supply from external source	Current capacity of I/O power supply terminal	Without I/O power supply terminals
NX Unit power consumption	• Connected to a CPU Unit or Communication Control Unit 0.85 W max. • Connected to a Communi- cations Coupler Unit 0.55 W max.	Current consumption from I/O power supply	No consumption
Weight	85 g max.
Circuit layout
Installation orientation and restrictions	Installation orientation: • Connected to a CPU Unit or Communication Control Unit: Possible in upright installation. • Connected to a Communications Coupler Unit: Possible in 6 orientations. Restrictions: As shown in the following.
Terminal connection diagram	• The polarity of the input power supply can be connected in either direction. • Be sure to wire both pins 3 and 4 (COM), and set the same polarity for both pins.
Disconnection/ Short-circuit detection	Not supported.	Protective function	Not supported.

Unit name	DC Input Unit	Model	NX-ID6142-5
Number of points	32 points	External connection terminals	MIL connector (40 terminals)
I/O refreshing method	Switching Synchronous I/O refreshing and Free-Run refreshing
Indicators	TS indicator, input indicators	Internal I/O common	For both NPN/PNP
Rated input voltage	24 VDC (19 to 28.8 VDC)
Input current	4.1 mA typical (24 VDC)
ON voltage/ON current	19 VDC min./3 mA min. (between COM and each signal)
OFF voltage/OFF current	5 VDC max./1 mA max. (between COM and each signal)
ON/OFF response time	20 μs max./400 μs max.
Input filter time	No filter, 0.25 ms, 0.5 ms, 1 ms (default), 2 ms, 4 ms, 8 ms, 16 ms, 32 ms, 64 ms, 128 ms, 256 ms
Dimensions	30 (W) x 100 (H) x 71 (D)	Isolation method	Photocoupler isolation
Insulation resistance	20 MΩ min. between isolated circuits (at 100 VDC)	Dielectric strength	510 VAC between isolated circuits for 1 minute at a leakage current of 5 mA max.
I/O power supply method	Supply from external source	Current capacity of I/O power supply terminal	Without I/O power supply terminals
NX Unit power consumption	• Connected to a CPU Unit or Communication Control Unit 0.90 W max. • Connected to a Communi- cations Coupler Unit 0.60 W max.	Current consumption from I/O power supply	No consumption
Weight	90 g max.
Circuit layout
Installation orientation and restrictions	Installation orientation: • Connected to a CPU Unit or Communication Control Unit: Possible in upright installation. • Connected to a Communications Coupler Unit: Possible in 6 orientations. Restrictions: As shown in the following.
Terminal connection diagram	• The polarity of the input power supply can be connected in either direction. • Be sure to wire both pins 23 and 24 (COM0), and set the same polarity for both pins. • Be sure to wire both pins 3 and 4 (COM1), and set the same polarity for both pins.
Disconnection/ Short-circuit detection	Not supported.	Protective function	Not supported.

Unit name	DC Input Unit	Model	NX-ID6142-6
Number of points	32 points	External connection terminals	Fujitsu connector (40 terminals)
I/O refreshing method	Switching Synchronous I/O refreshing and Free-Run refreshing
Indicators	TS indicator, input indicator	Internal I/O common	For both NPN/PNP
Rated input voltage	24 VDC (19 to 28.8 VDC)
Input current	4.1 mA typical (24 VDC)
ON voltage/ON current	19 VDC min./3 mA min. (between COM and each signal)
OFF voltage/OFF current	5 VDC max./1 mA max. (between COM and each signal)
ON/OFF response time	20 μs max./400 μs max.
Input filter time	No filter, 0.25 ms, 0.5 ms, 1 ms (default), 2 ms, 4 ms, 8 ms, 16 ms, 32 ms, 64 ms, 128 ms, 256 ms
Dimensions	30 (W) x 100 (H) x 71 (D)	Isolation method	Photocoupler isolation
Insulation resistance	20 MΩ min. between isolated circuits (at 100 VDC)	Dielectric strength	510 VAC between isolated circuits for 1 minute at a leakage current of 5 mA max.
I/O power supply method	Supply from external source	Current capacity of I/O power supply terminal	Without I/O power supply terminals
NX Unit power consumption	• Connected to a CPU Unit or Communication Control Unit 0.95 W max. • Connected to a Communi- cations Coupler Unit 0.55 W max.	Current consumption from I/O power supply	No consumption
Weight	90 g max.
Circuit layout
Installation orientation and restrictions	Installation orientation: • Connected to a CPU Unit or Communication Control Unit: Possible in upright installation. • Connected to a Communications Coupler Unit: Possible in 6 orientations. Restrictions: As shown in the following.
Terminal connection diagram	• The polarity of the input power supply can be connected in either direction. • Be sure to wire both pins A9 and A18 (COM0), and set the same polarity for both pins. • Be sure to wire both pins B9 and B18 (COM1), and set the same polarity for both pins.
Disconnection/ Short-circuit detection	Not supported.	Protective function	Not supported.

Unit name	AC Input Unit	Model	NX-IA3117
Number of points	4 points, independent contacts	External connection terminals	Screwless clamping terminal block (8 terminals)
Capacity	Free-Run refreshing
Indicators	TS indicator, input indicator	Internal I/O common	No polarity
Rated input voltage	200 to 240 VAC, 50/60 Hz (170 to 264 VAC, ±3 Hz)
Input current	9 mA typical (at 200 VAC, 50 Hz) 11 mA typical (at 200 VAC, 60 Hz)
ON voltage/ ON current	120 VAC min./4 mA min.
OFF voltage/ OFF current	40 VAC max./2 mA max.
ON/OFF response time	10 ms max./40 ms max.
Input filter time	No filter, 0.25 ms, 0.5 ms, 1 ms (default), 2 ms, 4 ms, 8 ms, 16 ms, 32 ms, 64 ms, 128 ms, 256 ms
Dimensions	12 (W) x 100 (H) x 71 (D)	Isolation method	Photocoupler isolation
Insulation resistance	Between each AC input circuit: 20 MΩ min. (at 500 VDC) Between the external terminals and the functional ground terminal: 20 MΩ min. (at 500 VDC) Between the external terminals and internal circuits: 20 MΩ min. (at 500 VDC) Between the internal circuit and the functional ground terminal: 20 MΩ min. (at 100 VDC)	Dielectric strength	Between each AC input circuit: AC3700V VAC for 1 min at a leakage current of 5 mA max. Between the external terminals and functional ground terminal: 2300 VAC for 1 min at a leakage current of 5 mA max. Between the external terminals and internal circuits: 2300 VAC for 1 min at a leakage current of 5 mA max. Between the internal circuit and the functional ground terminal: 510 VAC for 1 min at a leakage current of 5 mA max.
I/O power supply method	Supplied from external source.	Current capacity of I/O power supply terminal	Without I/O power supply terminals
NX Unit power consumption	• Connected to a CPU Unit or Communication Control Unit 0.80 W max. • Connected to a Communi- cations Coupler Unit 0.50 W max.	Current consumption from I/O power supply	No consumption
Weight	60 g max.
Circuit layout
Installation orientation and restrictions	Installation orientation: • Connected to a CPU Unit or Communication Control Unit: Possible in upright installation. • Connected to a Communications Coupler Unit: Possible in 6 orientations. Restrictions: No restrictions
Terminal connection diagram
Disconnection/ Short-circuit detection	Not supported.	Protective function	Not supported.

Unit name	Transistor Output Unit	Model	NX-OD2154
Number of points	2 points	External connection terminals	Screwless clamping terminal block (8 terminals)
I/O refreshing method	Output refreshing with specified time stamp
Indicators	TS indicator, output indicator	Internal I/O common	NPN
Rated voltage	24 VDC
Operating load voltage range	15 to 28.8 VDC
Maximum value of load current	0.5 A/point, 1 A/Unit
Maximum inrush current	4.0 A/point, 10 ms max.
Leakage current	0.1 mA max.
Residual voltage	1.5 V max.
ON/OFF response time	300 ns max./300 ns max.
Dimensions	12 (W) x 100 (H) x 71 (D)	Isolation method	Digital isolator isolation
Insulation resistance	20 MΩ min. between isolated circuits (at 100 VDC)	Dielectric strength	510 VAC between isolated circuits for 1 minute at a leakage current of 5 mA max.
I/O power supply method	Supply from the NX bus	Current capacity of I/O power supply terminal	IOV: 0.5 A/terminal max., IOG: 0.5 A/terminal max.
NX Unit power consumption	• Connected to a CPU Unit 0.85 W max. • Connected to a Communi- cations Coupler Unit 0.45 W max.	I/O current consumption	30 mA max.
Weight	70 g max.
Circuit layout	This unit uses a push-pull output circuit.
Installation orientation and restrictions	Installation orientation: • Connected to a CPU Unit: Possible in upright installation. • Connected to a Communications Coupler Unit: Possible in 6 orientations. Restrictions: No restrictions
Terminal connection diagram
Disconnection/ Short-circuit detection	Not supported.	Protective function	Not supported.

Unit name	Transistor Output Unit	Model	NX-OD2258
Number of points	2 points	External connection terminals	Screwless clamping terminal block (8 terminals)
I/O refreshing method	Output refreshing with specified time stamp
Indicators	TS indicator, output indicator	Internal I/O common	PNP
Rated voltage	24 VDC
Operating load voltage range	15 to 28.8 VDC
Maximum value of load current	0.5 A/point, 1 A/Unit
Maximum inrush current	4.0 A/point, 10 ms max.
Leakage current	0.1 mA max.
Residual voltage	1.5 V max.
ON/OFF response time	300 ns max./300 ns max.
Dimensions	12 (W) x 100 (H) x 71 (D)	Isolation method	Digital isolator isolation
Insulation resistance	20 MΩ min. between isolated circuits (at 100 VDC)	Dielectric strength	510 VAC between isolated circuits for 1 minute at a leakage current of 5 mA max.
I/O power supply method	Supply from the NX bus	Current capacity of I/O power supply terminal	IOV: 0.5 A/terminal max., IOG: 0.5 A/terminal max.
NX Unit power consumption	• Connected to a CPU Unit 0.85 W max. • Connected to a Communi- cations Coupler Unit 0.50 W max.	I/O current consumption	40 mA max.
Weight	70 g max.
Circuit layout	This unit uses a push-pull output circuit.
Installation orientation and restrictions	Installation orientation: • Connected to a CPU Unit: Possible in upright installation. • Connected to a Communications Coupler Unit: Possible in 6 orientations. Restrictions: No restrictions
Terminal connection diagram
Disconnection/ Short-circuit detection	Not supported.	Protective function	With load short-circuit protection.

Unit name	Transistor Output Unit	Model	NX-OD3121
Number of points	4 points	External connection terminals	Screwless clamping terminal block (12 terminals)
I/O refreshing method	Selectable Synchronous I/O refreshing or Free-Run refreshing
Indicators	TS indicator, output indicator	Internal I/O common	NPN
Rated voltage	12 to 24 VDC
Operating load voltage range	10.2 to 28.8 VDC
Maximum value of load current	0.5 A/point, 2 A/Unit
Maximum inrush current	4.0 A/point, 10 ms max.
Leakage current	0.1 mA max.
Residual voltage	1.5 V max.
ON/OFF response time	0.1 ms max./0.8 ms max.
Dimensions	12 (W) x 100 (H) x 71 (D)	Isolation method	Photocoupler isolation
Insulation resistance	20 MΩ min. between isolated circuits (at 100 VDC)	Dielectric strength	510 VAC between isolated circuits for 1 minute at a leakage current of 5 mA max.
I/O power supply method	Supply from the NX bus	Current capacity of I/O power supply terminal	IOV: 0.5 A/terminal max., IOG: 0.5 A/terminal max.
NX Unit power consumption	• Connected to a CPU Unit or Communication Control Unit 0.90 W max. • Connected to a Communi- cations Coupler Unit 0.55 W max.	I/O current consumption	10 mA max.
Weight	70 g max.
Circuit layout
Installation orientation and restrictions	Installation orientation: • Connected to a CPU Unit or Communication Control Unit: Possible in upright installation. • Connected to a Communications Coupler Unit: Possible in 6 orientations. Restrictions: No restrictions
Terminal connection diagram
Disconnection/ Short-circuit detection	Not supported.	Protective function	Not supported.

Unit name	Transistor Output Unit	Model	NX-OD3153
Number of points	4 points	External connection terminals	Screwless clamping terminal block (12 terminals)
I/O refreshing method	Selectable Synchronous I/O refreshing or Free-Run refreshing
Indicators	TS indicator, output indicator	Internal I/O common	NPN
Rated voltage	24 VDC
Operating load voltage range	15 to 28.8 VDC
Maximum value of load current	0.5 A/point, 2 A/Unit
Maximum inrush current	4.0 A/point, 10 ms max.
Leakage current	0.1 mA max.
Residual voltage	1.5 V max.
ON/OFF response time	300 ns max./300 ns max.
Dimensions	12 (W) x 100 (H) x 71 (D)	Isolation method	Digital isolator isolation
Insulation resistance	20 MΩ min. between isolated circuits (at 100 VDC)	Dielectric strength	510 VAC between isolated circuits for 1 minute at a leakage current of 5 mA max.
I/O power supply method	Supply from the NX bus	Current capacity of I/O power supply terminal	IOV: 0.5 A/terminal max., IOG: 0.5 A/terminal max.
NX Unit power consumption	• Connected to a CPU Unit or Communication Control Unit 0.90 W max. • Connected to a Communi- cations Coupler Unit 0.50 W max.	I/O current consumption	30 mA max.
Weight	70 g max.
Circuit layout	This unit uses a push-pull output circuit.
Installation orientation and restrictions	Installation orientation: • Connected to a CPU Unit or Communication Control Unit: Possible in upright installation. • Connected to a Communications Coupler Unit: Possible in 6 orientations. Restrictions: No restrictions
Terminal connection diagram
Disconnection/ Short-circuit detection	Not supported.	Protective function	Not supported.

Unit name	Transistor Output Unit	Model	NX-OD3256
Number of points	4 points	External connection terminals	Screwless clamping terminal block (12 terminals)
I/O refreshing method	Selectable Synchronous I/O refreshing or Free-Run refreshing
Indicators	TS indicator, output indicator	Internal I/O common	PNP
Rated voltage	24 VDC
Operating load voltage range	15 to 28.8 VDC
Maximum value of load current	0.5 A/point, 2 A/Unit
Maximum inrush current	4.0 A/point, 10 ms max.
Leakage current	0.1 mA max.
Residual voltage	1.5 V max.
ON/OFF response time	0.5 ms max./1.0 ms max.
Dimensions	12 (W) x 100 (H) x 71 (D)	Isolation method	Photocoupler isolation
Insulation resistance	20 MΩ min. between isolated circuits (at 100 VDC)	Dielectric strength	510 VAC between isolated circuits for 1 minute at a leakage current of 5 mA max.
I/O power supply method	Supply from the NX bus	Current capacity of I/O power supply terminal	IOV: 0.5 A/terminal max., IOG: 0.5 A/terminal max.
NX Unit power consumption	• Connected to a CPU Unit or Communication Control Unit 0.90 W max. • Connected to a Communi- cations Coupler Unit 0.55 W max.	I/O current consumption	20 mA max.
Weight	70 g max.
Circuit layout
Installation orientation and restrictions	Installation orientation: • Connected to a CPU Unit or Communication Control Unit: Possible in upright installation. • Connected to a Communications Coupler Unit: Possible in 6 orientations. Restrictions: No restrictions
Terminal connection diagram
Disconnection/ Short-circuit detection	Not supported.	Protective function	With load short-circuit protection.

Unit name	Transistor Output Unit	Model	NX-OD3257
Number of points	4 points	External connection terminals	Screwless clamping terminal block (12 terminals)
I/O refreshing method	Selectable Synchronous I/O refreshing or Free-Run refreshing
Indicators	TS indicator, output indicator	Internal I/O common	PNP
Rated voltage	24 VDC
Operating load voltage range	15 to 28.8 VDC
Maximum value of load current	0.5 A/point, 2 A/Unit
Maximum inrush current	4.0 A/point, 10 ms max.
Leakage current	0.1 mA max.
Residual voltage	1.5 V max.
ON/OFF response time	300 ns max./300 ns max.
Dimensions	12 (W) x 100 (H) x 71 (D)	Isolation method	Digital isolator isolation
Insulation resistance	20 MΩ min. between isolated circuits (at 100 VDC)	Dielectric strength	510 VAC between isolated circuits for 1 minute at a leakage current of 5 mA max.
I/O power supply method	Supply from the NX bus	Current capacity of I/O power supply terminal	IOV: 0.5 A/terminal max., IOG: 0.5 A/terminal max.
NX Unit power consumption	• Connected to a CPU Unit or Communication Control Unit 0.85 W max. • Connected to a Communi- cations Coupler Unit 0.50 W max.	I/O current consumption	40 mA max.
Weight	70 g max.
Circuit layout	This unit uses a push-pull output circuit.
Installation orientation and restrictions	Installation orientation: • Connected to a CPU Unit or Communication Control Unit: Possible in upright installation. • Connected to a Communications Coupler Unit: Possible in 6 orientations. Restrictions: No restrictions
Terminal connection diagram
Disconnection/ Short-circuit detection	Not supported.	Protective function	With load short-circuit protection.

Unit name	Transistor Output Unit	Model	NX-OD3268
Number of points	4 points	External connection terminals	Screwless clamping terminal block (16 terminals)
I/O refreshing method	Switching Synchronous I/O refreshing and Free-Run refreshing
Indicators	TS indicator, output indicator	Internal I/O common	PNP
Rated voltage	24 VDC
Operating load voltage range	15 to 28.8 VDC
Maximum value of load current	2 A/point, 8 A/Unit
Maximum inrush current	4.0 A/point, 10 ms max.
Leakage current	0.1 mA max.
Residual voltage	1.5 V max.
ON/OFF response time	0.5 ms max./1.0 ms max.
Dimensions	12 (W) x 100 (H) x 71 (D)	Isolation method	Photocoupler isolation
Insulation resistance	20 MΩ min. between isolated circuits (at 100 VDC)	Dielectric strength	510 VAC between isolated circuits for 1 minute at a leakage current of 5 mA max.
I/O power supply method	Supply from external source	Current capacity of I/O power supply terminal	IOV: 2 A/terminal max., IOG: 2 A/terminal max., COM (+V): 4 A/terminal max., 0V: 4 A/terminal max.
NX Unit power consumption	• Connected to a CPU Unit or Communication Control Unit 0.85 W max. • Connected to a Communi- cations Coupler Unit 0.50 W max.	Current consumption from I/O power supply	20 mA max.
Weight	70 g max.
Circuit layout
Installation orientation and restrictions	Installation orientation: • Connected to a CPU Unit or Communication Control Unit: Possible in upright installation. • Connected to a Communications Coupler Unit: Possible in 6 orientations. Restrictions: No restrictions
Terminal connection diagram	• 0V has 2 terminals, so be sure to wire both terminals. • COM (+V) has 2 terminals, so be sure to wire both terminals.
Disconnection/ Short-circuit detection	Not supported.	Protective function	With load short-circuit protection.

Unit name	Transistor Output Unit	Model	NX-OD4121
Number of points	8 points	External connection terminals	Screwless clamping terminal block (16 terminals)
I/O refreshing method	Selectable Synchronous I/O refreshing or Free-Run refreshing
Indicators	TS indicator, output indicator	Internal I/O common	NPN
Rated voltage	12 to 24 VDC
Operating load voltage range	10.2 to 28.8 VDC
Maximum value of load current	0.5 A/point, 4 A/Unit
Maximum inrush current	4.0 A/point, 10 ms max.
Leakage current	0.1 mA
Residual voltage	1.5 V max.
ON/OFF response time	0.1 ms max./0.8 ms max.
Dimensions	12 (W) x 100 (H) x 71 (D)	Isolation method	Photocoupler isolation
Insulation resistance	20 MΩ min. between isolated circuits (at 100 VDC)	Dielectric strength	510 VAC between isolated circuits for 1 minute at a leakage current of 5 mA max.
I/O power supply method	Supply from the NX bus	Current capacity of I/O power supply terminal	IOV: 0.5 A/terminal max.
NX Unit power consumption	• Connected to a CPU Unit or Communication Control Unit 0.90 W max. • Connected to a Communi- cations Coupler Unit 0.55 W max.	I/O current consumption	10 mA max.
Weight	70 g max.
Circuit layout
Installation orientation and restrictions	Installation orientation: • Connected to a CPU Unit or Communication Control Unit: Possible in upright installation. • Connected to a Communications Coupler Unit: Possible in 6 orientations. Restrictions: No restrictions
Terminal connection diagram
Disconnection/ Short-circuit detection	Not supported.	Protective function	Not supported.

Unit name	Transistor Output Unit	Model	NX-OD4256
Number of points	8 points	External connection terminals	Screwless clamping terminal block (16 terminals)
I/O refreshing method	Selectable Synchronous I/O refreshing or Free-Run refreshing
Indicators	TS indicator, output indicator	Internal I/O common	PNP
Rated voltage	24 VDC
Operating load voltage range	15 to 28.8 VDC
Maximum value of load current	0.5 A/point, 4 A/Unit
Maximum inrush current	4.0 A/point, 10 ms max.
Leakage current	0.1 mA
Residual voltage	1.5 V max.
ON/OFF response time	0.5 ms max./1.0 ms max.
Dimensions	12 (W) x 100 (H) x 71 (D)	Isolation method	Photocoupler isolation
Insulation resistance	20 MΩ min. between isolated circuits (at 100 VDC)	Dielectric strength	510 VAC between isolated circuits for 1 minute at a leakage current of 5 mA max.
I/O power supply method	Supply from the NX bus	Current capacity of I/O power supply terminal	IOG: 0.5 A/terminal max.
NX Unit power consumption	• Connected to a CPU Unit or Communication Control Unit 1.00 W max. • Connected to a Communi- cations Coupler Unit 0.65 W max.	I/O current consumption	30 mA max.
Weight	70 g max.
Circuit layout
Installation orientation and restrictions	Installation orientation: • Connected to a CPU Unit or Communication Control Unit: Possible in upright installation. • Connected to a Communications Coupler Unit: Possible in 6 orientations. Restrictions: No restrictions
Terminal connection diagram
Disconnection/ Short-circuit detection	Not supported.	Protective function	With load short-circuit protection.

Unit name	Transistor Output Unit	Model	NX-OD5121
Number of points	16 points	External connection terminals	Screwless clamping terminal block (16 terminals)
I/O refreshing method	Selectable Synchronous I/O refreshing or Free-Run refreshing
Indicators	TS indicator, output indicator	Internal I/O common	NPN
Rated voltage	12 to 24 VDC
Operating load voltage range	10.2 to 28.8 VDC
Maximum value of load current	0.5 A/point, 4 A/Unit
Maximum inrush current	4.0 A/point, 10 ms max.
Leakage current	0.1 mA max.
Residual voltage	1.5 V max.
ON/OFF response time	0.1 ms max./0.8 ms max.
Dimensions	12 (W) x 100 (H) x 71 (D)	Isolation method	Photocoupler isolation
Insulation resistance	20 MΩ min. between isolated circuits (at 100 VDC)	Dielectric strength	510 VAC between isolated circuits for 1 minute at a leakage current of 5 mA max.
I/O power supply method	Supply from the NX bus	Current capacity of I/O power supply terminal	Without I/O power supply terminals
NX Unit power consumption	• Connected to a CPU Unit or Communication Control Unit 1.00 W max. • Connected to a Communi- cations Coupler Unit 0.65 W max.	I/O current consumption	20 mA max.
Weight	70 g max.
Circuit layout
Installation orientation and restrictions	Installation orientation: • Connected to a CPU Unit or Communication Control Unit: Possible in upright installation. • Connected to a Communications Coupler Unit: Possible in 6 orientations. Restrictions: No restrictions
Terminal connection diagram
Disconnection/ Short-circuit detection	Not supported.	Protective function	Not supported.

Unit name	Transistor Output Unit	Model	NX-OD5256
Number of points	16 points	External connection terminals	Screwless clamping terminal block (16 terminals)
I/O refreshing method	Selectable Synchronous I/O refreshing or Free-Run refreshing
Indicators	TS indicator, output indicator	Internal I/O common	PNP
Rated voltage	24 VDC
Operating load voltage range	15 to 28.8 VDC
Maximum value of load current	0.5 A/point, 4 A/Unit
Maximum inrush current	4.0 A/point, 10 ms max.
Leakage current	0.1 mA max.
Residual voltage	1.5 V max.
ON/OFF response time	0.5 ms max./1.0 ms max.
Dimensions	12 (W) x 100 (H) x 71 (D)	Isolation method	Photocoupler isolation
Insulation resistance	20 MΩ min. between isolated circuits (at 100 VDC)	Dielectric strength	510 VAC between isolated circuits for 1 minute at a leakage current of 5 mA max.
I/O power supply method	Supply from the NX bus	Current capacity of I/O power supply terminal	Without I/O power supply terminals
NX Unit power consumption	• Connected to a CPU Unit or Communication Control Unit 1.10 W max. • Connected to a Communi- cations Coupler Unit 0.70 W max.	I/O current consumption	40 mA max.
Weight	70 g max.
Circuit layout
Installation orientation and restrictions	Installation orientation: • Connected to a CPU Unit or Communication Control Unit: Possible in upright installation. • Connected to a Communications Coupler Unit: Possible in 6 orientations. Restrictions: No restrictions
Terminal connection diagram
Disconnection/ Short-circuit detection	Not supported.	Protective function	With load short-circuit protection.

Unit name	Transistor Output Unit	Model	NX-OD5121-1
Number of points	16 points	External connection terminals	M3 screw terminal block (18 terminals)
I/O refreshing method	Switching Synchronous I/O refreshing and Free-Run refreshing
Indicators	TS indicator, output indicator	Internal I/O common	NPN
Rated voltage	12 to 24 VDC
Operating load voltage range	10.2 to 28.8 VDC
Maximum value of load current	0.5 A/point, 5 A/Unit
Maximum inrush current	4.0 A/point, 10 ms max.
Leakage current	0.1 mA max.
Residual voltage	1.5 V max.
ON/OFF response time	0.1 ms max./0.8 ms max.
Dimensions	30 (W) x 100 (H) x 71 (D)	Isolation method	Photocoupler isolation
Insulation resistance	20 MΩ min. between isolated circuits (at 100 VDC)	Dielectric strength	510 VAC between isolated circuits for 1 minute at a leakage current of 5 mA max.
I/O power supply method	Supply from the external source	Current capacity of I/O power supply terminal	Without I/O power supply terminals
NX Unit power consumption	• Connected to a CPU Unit or Communication Control Unit 0.90 W max. • Connected to a Communi- cations Coupler Unit 0.60 W max.	Current consumption from I/O power supply	30 mA max.
Weight	125 g max.
Circuit layout
Installation orientation and restrictions	Installation orientation: • Connected to a CPU Unit or Communication Control Unit: Possible in upright installation. • Connected to a Communications Coupler Unit: Possible in 6 orientations. Restrictions: No restrictions
Terminal connection diagram
Disconnection/ Short-circuit detection	Not supported.	Protective function	Not supported.

Unit name	Transistor Output Unit	Model	NX-OD5256-1
Number of points	16 points	External connection terminals	M3 screw terminal block (18 terminals)
I/O refreshing method	Switching Synchronous I/O refreshing and Free-Run refreshing
Indicators	TS indicator, output indicator	Internal I/O common	PNP
Rated voltage	24 VDC
Operating load voltage range	20.4 to 28.8 VDC
Maximum value of load current	0.5 A/point, 5 A/Unit
Maximum inrush current	4.0 A/point, 10 ms max.
Leakage current	0.1 mA max.
Residual voltage	1.5 V max.
ON/OFF response time	0.5 ms max./1.0 ms max.
Dimensions	30 (W) x 100 (H) x 71 (D)	Isolation method	Photocoupler isolation
Insulation resistance	20 MΩ min. between isolated circuits (at 100 VDC)	Dielectric strength	510 VAC between isolated circuits for 1 minute at a leakage current of 5 mA max.
I/O power supply method	Supply from external source	Current capacity of I/O power supply terminal	Without I/O power supply terminals
NX Unit power consumption	• Connected to a CPU Unit or Communication Control Unit 0.95 W max. • Connected to a Communi- cations Coupler Unit 0.65 W max.	Current consumption from I/O power supply	30 mA max.
Weight	125 g max.
Circuit layout
Installation orientation and restrictions	Installation orientation: • Connected to a CPU Unit or Communication Control Unit: Possible in upright installation. • Connected to a Communications Coupler Unit: Possible in 6 orientations. Restrictions: No restrictions
Terminal connection diagram
Disconnection/ Short-circuit detection	Not supported.	Protective function	With load short-circuit protection.

Unit name	Transistor Output Unit	Model	NX-OD5121-5
Number of points	16 points	External connection terminals	MIL connector (20 terminals)
I/O refreshing method	Switching Synchronous I/O refreshing and Free-Run refreshing
Indicators	TS indicator, output indicator	Internal I/O common	NPN
Rated voltage	12 to 24 VDC
Operating load voltage range	10.2 to 28.8 VDC
Maximum value of load current	0.5 A/point, 2 A/Unit
Maximum inrush current	4.0 A/point, 10 ms max.
Leakage current	0.1 mA max.
Residual voltage	1.5 V max.
ON/OFF response time	0.1 ms max./0.8 ms max.
Dimensions	30 (W) x 100 (H) x 71 (D)	Isolation method	Photocoupler isolation
Insulation resistance	20 MΩ min. between isolated circuits (at 100 VDC)	Dielectric strength	510 VAC between isolated circuits for 1 minute at a leakage current of 5 mA max.
I/O power supply method	Supply from external source	Current capacity of I/O power supply terminal	Without I/O power supply terminals
NX Unit power consumption	• Connected to a CPU Unit or Communication Control Unit 0.95 W max. • Connected to a Communi- cations Coupler Unit 0.60 W max.	Current consumption from I/O power supply	30 mA max.
Weight	80 g max.
Circuit layout
Installation orientation and restrictions	Installation orientation: • Connected to a CPU Unit or Communication Control Unit: Possible in upright installation. • Connected to a Communications Coupler Unit: Possible in 6 orientations. Restrictions: No restrictions
Terminal connection diagram	• Be sure to wire both pins 3 and 4 (COM). • Be sure to wire both pins 1 and 2 (+V).
Disconnection/ Short-circuit detection	Not supported.	Protective function	Not supported.

Unit name	Transistor Output Unit	Model	NX-OD5256-5
Number of points	16 points	External connection terminals	MIL connector (20 terminals)
I/O refreshing method	Switching Synchronous I/O refreshing and Free-Run refreshing
Indicators	TS indicator, output indicator	Internal I/O common	PNP
Rated voltage	24 VDC
Operating load voltage range	20.4 to 28.8 VDC
Maximum value of load current	0.5 A/point, 2 A/Unit
Maximum inrush current	4.0 A/point, 10 ms max.
Leakage current	0.1 mA max.
Residual voltage	1.5 V max.
ON/OFF response time	0.5 ms max./1.0 ms max.
Dimensions	30 (W) x 100 (H) x 71 (D)	Isolation method	Photocoupler isolation
Insulation resistance	20 MΩ min. between isolated circuits (at 100 VDC)	Dielectric strength	510 VAC between isolated circuits for 1 minute at a leakage current of 5 mA max.
I/O power supply method	Supplied from external source.	Current capacity of I/O power supply terminal	Without I/O power supply terminals
NX Unit power consumption	• Connected to a CPU Unit or Communication Control Unit 1.00 W max. • Connected to a Communi- cations Coupler Unit 0.70 W max.	Current consumption from I/O power supply	40 mA max.
Weight	85 g max.
Circuit layout
Installation orientation and restrictions	Installation orientation: • Connected to a CPU Unit or Communication Control Unit: Possible in upright installation. • Connected to a Communications Coupler Unit: Possible in 6 orientations. Restrictions: No restrictions
Terminal connection diagram	• Be sure to wire both pins 1 and 2 (COM (+V)). • Be sure to wire both pins 3 and 4 (0V).
Disconnection/ Short-circuit detection	Not supported.	Protective function	With load short-circuit protection.

Unit name	Transistor Output Unit	Model	NX-OD6121-5
Number of points	32 points	External connection terminals	MIL connector (40 terminals)
I/O refreshing method	Switching Synchronous I/O refreshing and Free-Run refreshing
Indicators	TS indicator, output indicator	Internal I/O common	NPN
Rated voltage	12 to 24 VDC
Operating load voltage range	10.2 to 28.8 VDC
Maximum value of load current	0.5 A/point, 2 A/common, 4 A/Unit
Maximum inrush current	4.0 A/point, 10 ms max.
Leakage current	0.1 mA max.
Residual voltage	1.5 V max.
ON/OFF response time	0.1 ms max./0.8 ms max.
Dimensions	30 (W) x 100 (H) x 71 (D)	Isolation method	Photocoupler isolation
Insulation resistance	20 MΩ min. between isolated circuits (at 100 VDC)	Dielectric strength	510 VAC between isolated circuits for 1 minute at a leakage current of 5 mA max.
I/O power supply method	Supply from external source	Current capacity of I/O power supply terminal	Without I/O power supply terminals
NX Unit power consumption	• Connected to a CPU Unit or Communication Control Unit 1.00 W max. • Connected to a Communi- cations Coupler Unit 0.80 W max.	Current consumption from I/O power supply	50 mA max.
Weight	90 g max.
Circuit layout
Installation orientation and restrictions	Installation orientation: • Connected to a CPU Unit or Communication Control Unit: Possible in upright installation. • Connected to a Communications Coupler Unit: Possible in 6 orientations. Restrictions: No restrictions
Terminal connection diagram	• Be sure to wire both pins 21 and 22 (+V0). • Be sure to wire both pins 23 and 24 (COM0). • Be sure to wire both pins 1 and 2 (+V1). • Be sure to wire both pins 3 and 4 (COM1).
Disconnection/ Short-circuit detection	Not supported.	Protective function	Not supported.

Unit name	Transistor Output Unit	Model	NX-OD6256-5
Number of points	32 points	External connection terminals	MIL connector (40 terminals)
I/O refreshing method	Switching Synchronous I/O refreshing and Free-Run refreshing
Indicators	TS indicator, output indicator	Internal I/O common	PNP
Rated voltage	24 VDC
Operating load voltage range	20.4 to 28.8 VDC
Maximum value of load current	0.5 A/point, 2 A/common, 4 A/Unit
Maximum inrush current	4.0 A/point, 10 ms max.
Leakage current	0.1 mA max.
Residual voltage	1.5 V max.
ON/OFF response time	0.5 ms max./1.0 ms max.
Dimensions	30 (W) x 100 (H) x 71 (D)	Isolation method	Photocoupler isolation
Insulation resistance	20 MΩ min. between isolated circuits (at 100 VDC)	Dielectric strength	510 VAC between isolated circuits for 1 minute at a leakage current of 5 mA max.
I/O power supply method	Supply from external source	Current capacity of I/O power supply terminal	Without I/O power supply terminals
NX Unit power consumption	• Connected to a CPU Unit or Communication Control Unit 1.30 W max. • Connected to a Communi- cations Coupler Unit 1.00 W max.	Current consumption from I/O power supply	80 mA max.
Weight	95 g max.
Circuit layout
Installation orientation and restrictions	Installation orientation: • Connected to a CPU Unit or Communication Control Unit: Possible in upright installation. • Connected to a Communications Coupler Unit: Possible in 6 orientations. Restrictions: No restrictions
Terminal connection diagram	• Be sure to wire both pins 21 and 22 (COM0 (+V)). • Be sure to wire both pins 1 and 2 (COM1 (+V)). • Be sure to wire both pins 23 and 24 (0V0). • Be sure to wire both pins 3 and 4 (0V1).
Disconnection/ Short-circuit detection	Not supported.	Protective function	With load short-circuit protection.

Unit name	Transistor Output Unit	Model	NX-OD6121-6
Number of points	32 points	External connection terminals	Fujitsu connector (40 terminals)
I/O refreshing method	Switching Synchronous I/O refreshing and Free-Run refreshing
Indicators	TS indicator, output indicator	Internal I/O common	NPN
Rated voltage	12 to 24 VDC
Operating load voltage range	10.2 to 28.8 VDC
Maximum value of load current	0.5 A/point, 2 A/common, 4 A/Unit
Maximum inrush current	4.0 A/point, 10 ms max.
Leakage current	0.1 mA max.
Residual voltage	1.5 V max.
ON/OFF response time	0.1 ms max./0.8 ms max.
Dimensions	30 (W) x 100 (H) x 71 (D)	Isolation method	Photocoupler isolation
Insulation resistance	20 MΩ min. between isolated circuits (at 100 VDC)	Dielectric strength	510 VAC between isolated circuits for 1 minute at a leakage current of 5 mA max.
I/O power supply method	Supply from external source	Current capacity of I/O power supply terminal	Without I/O power supply terminals
NX Unit power consumption	• Connected to a CPU Unit or Communication Control Unit 1.10 W max. • Connected to a Communi- cations Coupler Unit 0.80 W max.	Current consumption from I/O power supply	50 mA max.
Weight	90 g max.
Circuit layout
Installation orientation and restrictions	Installation orientation: • Connected to a CPU Unit or Communication Control Unit: Possible in upright installation. • Connected to a Communications Coupler Unit: Possible in 6 orientations. Restrictions: No restrictions
Terminal connection diagram	• Be sure to wire both pins A9 and A19 (COM0). • Be sure to wire both pins B9 and B19 (COM1). • Be sure to wire both pins A10 and A20 (+V0). • Be sure to wire both pins B10 and B20 (+V1).
Disconnection/ Short-circuit detection	Not supported.	Protective function	Not supported.

Unit name	Relay Output Units	Model	NX-OC2633
Number of points	2 points, independent contacts	External connection terminals	Screwless clamping terminal block (8 terminals)
I/O refreshing method	Free-Run refreshing
Indicators	TS indicator, output indicator	Relay type	N.O. contact
Maximum switching capacity	250 VAC/2 A (cosφ = 1), 250 VAC/2 A (cosφ = 0.4), 24 VDC/2 A, 4 A/Unit
Minimum switching capacity	5 VDC, 1 mA
Relay service life	Electrical: 100,000 operations * Mechanical: 20,000,000 operations	ON/OFF response time	15 ms max./15 ms max.
Dimensions	12 (W) x 100 (H) x 71 (D)	Isolation method	Relay isolation
Insulation resistance	Between A1/B1 terminals and A3/B3 terminals: 20 MΩ min. (500 VDC) Between the external terminals and internal circuits: 20 MΩ min. (500 VDC) Between the internal circuit and GR terminal: 20 MΩ min. (100 VDC) Between the external terminals and GR terminal: 20 MΩ min. (500 VDC)	Dielectric strength	Between A1/B1 terminals and A3/B3 terminals: 2300 VAC for 1 min at a leakage current of 5 mA max. Between the external terminals and GR terminal: 2300 VAC for 1 min at a leakage current of 5 mA max. Between the external terminals and internal circuits: 2300 VAC for 1 min at a leakage current of 5 mA max. Between the internal circuit and GR terminal: 510 VAC for 1 min at a leakage current of 5 mA max.
Vibration resistance	Conforms to IEC60068-2-6. 5 to 8.4 Hz with amplitude of 3.5 mm, 8.4 to 150 Hz, acceleration of 9.8 m/s² 100 min each in X, Y, and Z directions (10 sweeps of 10 min each = 100 min total)	Shock resistance	100 m/s², 3 times each in X, Y, and Z directions
I/O power supply method	Supply from external source	Current capacity of I/O power supply terminal	Without I/O power supply terminals
NX Unit power consumption	• Connected to a CPU Unit or Communication Control Unit 1.20 W max. • Connected to a Communications Coupler Unit 0.80 W max.	I/O current consumption	No consumption
Weight	65 g max.
Circuit layout	You cannot replace the relay.
Installation orientation and restrictions	Installation orientation: • Connected to a CPU Unit or Communication Control Unit: Possible in upright installation. • Connected to a Communications Coupler Unit: Possible in 6 orientations. Restrictions: No restrictions
Terminal connection diagram
Disconnection/ Short-circuit detection	Not supported.	Protective function	Not supported.

Unit name	Relay Output Unit	Model	NX-OC2733
Number of points	2 points, independent contacts	External connection terminals	Screwless clamping terminal block (8 terminals)
I/O refreshing method	Free-Run refreshing
Indicators	TS indicator, output indicator	Maximum switching capacity	250 VAC/2 A (cosφ = 1), 250 VAC/2 A (cosφ = 0.4), 24 VDC/2 A, 4 A/Unit
Minimum switching capacity	5 VDC, 10 mA
Relay service life	Electrical: 100,000 operations Mechanical: 20,000,000 operations	ON/OFF response time	15 ms max./15 ms max.
Dimensions	12 (W) x 100 (H) x 71 (D)	Isolation method	Relay isolation
Insulation resistance	Between A1/3, B1/3 terminals and A5/7, B5/7 terminals: 20 MΩ min. (at 500 VDC) Between the external terminals and functional ground terminal: 20 MΩ min. (at 500 VDC) Between the external terminals and internal circuits: 20 MΩ min. (at 500 VDC) Between the internal circuit and the functional ground terminal: 20 MΩ min. (at 100 VDC)	Dielectric strength	Between A1/3, B1/3 terminals and A5/7, B5/7 terminals: 2300 VAC for 1 min at a leakage current of 5 mA max. Between the external terminals and the functional ground terminal: 2300 VAC for 1 min at a leakage current of 5 mA max. Between the external terminals and internal circuits: 2300 VAC for 1 min at a leakage current of 5 mA max. Between the internal circuit and the functional ground terminal: 510 VAC for 1 min at a leakage current of 5 mA max.
I/O power supply method	Supply from external source	Current capacity of I/O power supply terminal	Without I/O power supply terminals
NX Unit power consumption	• Connected to a CPU Unit or Communication Control Unit 1.30 W max. • Connected to a Communications Coupler Unit 0.95 W max.	Current consumption from I/O power supply	No consumption
Weight	70 g max.
Circuit layout	NO0 and NO1 are normal open contacts, and NC0 and NC1 are normal close contacts. You cannot replace the relay.
Installation orientation and restrictions	Installation orientation: • Connected to a CPU Unit or Communication Control Unit: Possible in upright installation. • Connected to a Communications Coupler Unit: Possible in 6 orientations. Restrictions: No restrictions
Terminal connection diagram
Disconnection/ Short-circuit detection	Not supported.	Protective function	Not supported.

Unit name	Relay Output Unit	Model	NX-OC4633
Number of points	8 points, independent contacts	External connection terminals	Screwless clamping terminal block (8 terminals x 2)
I/O refreshing method	Free-Run refreshing
Indicators	TS indicator, output indicator	Relay type	N.O. contact
Maximum switching capacity	250 VAC/2 A (cosφ = 1), 250 VAC/2 A (cosφ = 0.4), 24 VDC/2 A, 8 A/Unit
Minimum switching capacity	5 VDC, 1 mA
Relay service life	Electrical: 100,000 operations* Mechanical: 20,000,000 operations	ON/OFF response time	15 ms max./15 ms max.
Dimensions	24 (W) x 100 (H) x 71 (D)	Isolation method	Relay isolation
Insulation resistance	Between output bits: 20 MΩ min. (at 500 VDC) Between the external terminals and the functional ground terminal: 20 MΩ min. (at 500 VDC) Between the external terminals and internal circuits: 20 MΩ min. (at 500 VDC) Between the internal circuit and the functional ground terminal: 20 MΩ min. (at 100 VDC)	Dielectric strength	Between output bits: 2300 VAC for 1 min at a leakage current of 5 mA max. Between the external terminals and the functional ground terminal: 2300 VAC for 1 min at a leakage current of 5 mA max. Between the external terminals and internal circuits: 2300 VAC for 1 min at a leakage current of 5 mA max. Between the internal circuit and the functional ground terminal: 510 VAC for 1 min at a leakage current of 5 mA max.
Vibration resistance	Conforms to IEC 60068-2-6. 5 to 8.4 Hz with amplitude of 3.5 mm, 8.4 to 150 Hz, acceleration of 9.8 m/s² 100 min each in X, Y, and Z directions (10 sweeps of 10 min each = 100 min total)	Shock resistance	100 m/s², 3 times each in X, Y, and Z directions
I/O power supply method	Supply from external source	Current capacity of I/O power supply terminal	Without I/O power supply terminals
NX Unit power consumption	• Connected to a CPU Unit or Communication Control Unit 2.00 W max. • Connected to a Communications Coupler Unit 1.65 W max.	Current consumption from I/O power supply	No consumption
Weight	140 g max.
Circuit layout
Installation orientation and restrictions	Installation orientation: • Connected to a CPU Unit or Communication Control Unit: Possible in upright installation. • Connected to a Communications Coupler Unit: Possible in 6 orientations. Restrictions: As shown in the following.
Terminal connection diagram

Unit name	DC Input/Transistor Output Unit	Model	NX-MD6121-5
Number of points	16 inputs/16 outputs	External connection terminals	2 MIL connectors (20 terminals)
I/O refreshing method	Switching Synchronous I/O refreshing and Free-Run refreshing
Output section (CN1)	Internal I/O common	NPN	Input section (CN2)	Internal I/O common	For both NPN/PNP
Rated voltage	12 to 24 VDC	Rated input voltage	24 VDC (15 to 28.8 VDC)
Operating load voltage range	10.2 to 28.8 VDC	Input current	7 mA typical (at 24 VDC)
Maximum value of load current	0.5 A/point, 2 A/Unit	ON voltage/ ON current	15 VDC min./3 mA min. (between COM and each signal)
Maximum inrush current	4.0 A/point, 10 ms max.	OFF voltage/ OFF current	5 VDC max./1 mA max. (between COM and each signal)
Leakage current	0.1 mA max.	ON/OFF response time	20 μs max./400 μs max.
Residual voltage	1.5 V max.	Input filter time	No filter, 0.25 ms, 0.5 ms, 1 ms (default), 2 ms, 4 ms, 8 ms, 16 ms, 32 ms, 64 ms, 128 ms, 256 ms
ON/OFF response time	0.1 ms max./0.8 ms max.
Indicators	TS indicator, I/O indicators	Dimensions	30 (W) x 100 (H) x 71 (D)
Isolation method	Photocoupler isolation
Insulation resistance	20 MΩ min. between isolated circuits (at 100 VDC)
Dielectric strength	510 VAC between isolated circuits for 1 minute at a leakage current of 5 mA max.
I/O power supply method	Supply from external source
Current capacity of I/O power supply terminal	Without I/O power supply terminals
NX Unit power consumption	• Connected to a CPU Unit or Communication Control Unit 1.00 W max. • Connected to a Communica- tions Coupler Unit 0.70 W max.
Current consumption from I/O power supply	30 mA max.
Weight	105 g max.
Circuit layout
Installation orientation and restrictions	Installation orientation: • Connected to a CPU Unit or Communication Control Unit: Possible in upright installation. • Connected to a Communications Coupler Unit: Possible in 6 orientations. Restrictions: As shown in the following.
Terminal connection diagram
Disconnection/Short- circuit detection	Not supported.	Protective function	Not supported.

Unit name	DC Input/Transistor Output Unit	Model	NX-MD6256-5
Number of points	16 inputs/16 outputs	External connection terminals	2 MIL connectors (20 terminals)
I/O refreshing method	Switching Synchronous I/O refreshing and Free-Run refreshing
Output section (CN1)	Internal I/O common	PNP	Input section (CN2)	Internal I/O common	For both NPN/PNP
Rated voltage	24 VDC	Rated input voltage	24 VDC (15 to 28.8 VDC)
Operating load voltage range	20.4 to 28.8 VDC	Input current	7 mA typical (at 24 VDC)
Maximum value of load current	0.5 A/point, 2 A/Unit	ON voltage/ ON current	15 VDC min./3 mA min. (between COM and each signal)
Maximum inrush current	4.0 A/point, 10 ms max.	OFF voltage/ OFF current	5 VDC max./1 mA max. (between COM and each signal)
Leakage current	0.1 mA max.	ON/OFF response time	20 μs max./400 μs max.
Residual voltage	1.5 V max.	Input filter time	No filter, 0.25 ms, 0.5 ms, 1 ms (default), 2 ms, 4 ms, 8 ms, 16 ms, 32 ms, 64 ms, 128 ms, 256 ms
ON/OFF response time	0.5 ms max./1.0 ms max.
Indicators	TS indicator, I/O indicators	Dimensions	30 (W) x 100 (H) x 71 (D)
Isolation method	Photocoupler isolation
Insulation resistance	20 MΩ min. between isolated circuits (at 100 VDC)
Dielectric strength	510 VAC between isolated circuits for 1 minute at a leakage current of 5 mA max.
I/O power supply method	Supply from external source
Current capacity of I/O power supply terminal	Without I/O power supply terminals
NX Unit power consumption	• Connected to a CPU Unit or Communication Control Unit 1.10 W max. • Connected to a Communica- tions Coupler Unit 0.75 W max.
Current consumption from I/O power supply	40 mA max.
Weight	110 g max.
Circuit layout
Installation orientation and restrictions	Installation orientation: • Connected to a CPU Unit or Communication Control Unit: Possible in upright installation. • Connected to a Communications Coupler Unit: Possible in 6 orientations. Restrictions: As shown in the following.
Terminal connection diagram
Disconnection/Short- circuit detection	Not supported.	Protective function	With load short-circuit protection.

Unit name	DC Input/Transistor Output Unit	Model	NX-MD6121-6
Number of points	16 inputs/16 outputs	External connection terminals	2 Fujitsu connectors (24 terminals)
I/O refreshing method	Switching Synchronous I/O refreshing and Free-Run refreshing
Output section (CN1)	Internal I/O common	NPN	Input section (CN2)	Internal I/O common	For both NPN/PNP
Rated voltage	12 to 24 VDC	Rated input voltage	24 VDC (15 to 28.8 VDC)
Operating load voltage range	10.2 to 28.8 VDC	Input current	7 mA typical (at 24 VDC)
Maximum value of load current	0.5 A/point, 2 A/Unit	ON voltage/ ON current	15 VDC min./3 mA min. (between COM and each signal)
Maximum inrush current	4.0 A/point, 10 ms max.	OFF voltage/ OFF current	5 VDC max./1 mA max. (between COM and each signal)
Leakage current	0.1 mA max.	ON/OFF response time	20 μs max./400 μs max.
Residual voltage	1.5 V max.	Input filter time	No filter, 0.25 ms, 0.5 ms, 1 ms (default), 2 ms, 4 ms, 8 ms, 16 ms, 32 ms, 64 ms, 128 ms, 256 ms
ON/OFF response time	0.1 ms max./0.8 ms max.
Indicators	TS indicator, I/O indicators	Dimensions	30 (W) x 100 (H) x 71 (D)
Isolation method	Photocoupler isolation
Insulation resistance	20 MΩ min. between isolated circuits (at 100 VDC)
Dielectric strength	510 VAC between isolated circuits for 1 minute at a leakage current of 5 mA max.
I/O power supply method	Supply from external source
Current capacity of I/O power supply terminal	Without I/O power supply terminals
NX Unit power consumption	• Connected to a CPU Unit or Communication Control Unit 1.00 W max. • Connected to a Communi- cations Coupler Unit 0.70 W max.
Current consumption from I/O power supply	30 mA max.
Weight	95 g max.
Circuit layout
Installation orientation and restrictions	Installation orientation: • Connected to a CPU Unit or Communication Control Unit: Possible in upright installation. • Connected to a Communications Coupler Unit: Possible in 6 orientations. Restrictions: As shown in the following.
Terminal connection diagram
Disconnection/Short- circuit detection	Not supported.	Protective function	Not supported.

NX Unit	Corresponding unit versions/versions
Model	Unit version	CPU Unit	Sysmac Studio
NX-ID3317	Ver.1.0	Ver.1.13	Ver.1.17
NX-ID3343
NX-ID3344
NX-ID3417
NX-ID3443
NX-ID3444
NX-ID4342
NX-ID4442
NX-ID5142-1
NX-ID5142-5
NX-ID5342
NX-ID5442
NX-ID6142-5
NX-ID6142-6
NX-IA3117
NX-OD2154
NX-OD2258
NX-OD3121
NX-OD3153
NX-OD3256
NX-OD3257
NX-OD3268
NX-OD4121
NX-OD4256
NX-OD5121
NX-OD5121-1
NX-OD5121-5
NX-OD5256
NX-OD5256-1
NX-OD5256-5
NX-OD6121-5
NX-OD6121-6
NX-OD6256-5
NX-OC2633
NX-OC2733
NX-OC4633
NX-MD6121-5
NX-MD6121-6
NX-MD6256-5

NX Unit	Corresponding unit versions/versions
Model	Unit version	EtherCAT Coupler Unit	CPU Unit or Industrial PC	Sysmac Studio
NX-ID3317	Ver.1.0	Ver.1.0	Ver.1.05	Ver.1.06
NX-ID3343
NX-ID3344	Ver.1.1	Ver.1.06 *	Ver.1.07
NX-ID3417	Ver.1.0	Ver.1.05	Ver.1.06
NX-ID3443
NX-ID3444	Ver.1.1	Ver.1.06 *	Ver.1.07
NX-ID4342	Ver.1.0	Ver.1.05	Ver.1.06
NX-ID4442
NX-ID5142-1	Ver.1.13
NX-ID5142-5	Ver.1.10
NX-ID5342	Ver.1.06
NX-ID5442
NX-ID6142-5	Ver.1.10
NX-ID6142-6	Ver.1.13
NX-IA3117	Ver.1.08
NX-OD2154	Ver.1.0	Ver.1.1	Ver.1.06 *	Ver.1.07
NX-OD2258
NX-OD3121	Ver.1.0	Ver.1.05	Ver.1.06
NX-OD3153
NX-OD3256
NX-OD3257
NX-OD3268	Ver.1.13
NX-OD4121	Ver.1.06
NX-OD4256
NX-OD5121
NX-OD5121-1	Ver.1.13
NX-OD5121-5	Ver.1.10
NX-OD5256	Ver.1.06
NX-OD5256-1	Ver.1.13
NX-OD5256-5	Ver.1.10
NX-OD6121-5
NX-OD6121-6	Ver.1.13
NX-OD6256-5	Ver.1.10
NX-OC2633	Ver.1.06
NX-OC2733	Ver.1.08
NX-OC4633	Ver.1.17
NX-MD6121-5	Ver.1.0	Ver.1.0	Ver.1.05	Ver.1.10
NX-MD6121-6	Ver.1.13
NX-MD6256-5	Ver.1.10

NX Unit	Corresponding unit versions/versions
Model	Unit version	Application with an NJ/NX/NY-series Controller *1	Application with a CS/CJ/CP-series PLC *2
EtherNet/IP Coupler Unit	CPU Unit or Industrial PC	Sysmac Studio	EtherNet/IP Coupler Unit	Sysmac Studio	NX-IO Configurator *3
NX-ID3317	Ver. 1.0	Ver. 1.2	Ver. 1.14	Ver. 1.19	Ver. 1.0	Ver. 1.10	Ver. 1.00
NX-ID3343
NX-ID3344	---	---	---	---	---	---
NX-ID3417	Ver. 1.2	Ver. 1.14	Ver. 1.19	Ver. 1.0	Ver. 1.10	Ver. 1.00
NX-ID3443
NX-ID3444	---	---	---	---	---	---
NX-ID4342	Ver. 1.2	Ver. 1.14	Ver. 1.19	Ver. 1.0	Ver. 1.10	Ver. 1.00
NX-ID4442
NX-ID5142-1	Ver. 1.13
NX-ID5142-5	Ver. 1.10
NX-ID5342
NX-ID5442
NX-ID6142-5
NX-ID6142-6	Ver. 1.13
NX-IA3117	Ver. 1.10
NX-OD2154	---	---	---	---	---	---
NX-OD2258
NX-OD3121	Ver. 1.2	Ver. 1.14	Ver. 1.19	Ver. 1.0	Ver. 1.10	Ver. 1.00
NX-OD3153
NX-OD3256
NX-OD3257
NX-OD3268	Ver. 1.13
NX-OD4121	Ver. 1.10
NX-OD4256
NX-OD5121
NX-OD5121-1	Ver. 1.13
NX-OD5121-5	Ver. 1.10
NX-OD5256
NX-OD5256-1	Ver. 1.13
NX-OD5256-5	Ver. 1.10
NX-OD6121-5
NX-OD6121-6	Ver. 1.13
NX-OD6256-5	Ver. 1.10
NX-OC2633
NX-OC2733
NX-OC4633	Ver. 1.17
NX-MD6121-5	Ver. 1.10
NX-MD6121-6	Ver. 1.13
NX-MD6256-5	Ver. 1.10

NX Unit	Corresponding unit versions/versions
Model	Unit version	Communication Control Unit	Sysmac Studio
NX-ID3317	Ver. 1.0	Ver. 1.00	Ver. 1.24
NX-ID3343
NX-ID3344	---	---
NX-ID3417	Ver. 1.00	Ver. 1.24
NX-ID3443
NX-ID3444	Ver. 1.0	---	---
NX-ID4342	Ver. 1.00	Ver. 1.24
NX-ID4442
NX-ID5142-1
NX-ID5142-5
NX-ID5342
NX-ID5442
NX-ID6142-5
NX-ID6142-6
NX-IA3117
NX-OD2154	---	---
NX-OD2258
NX-OD3121	Ver. 1.00	Ver. 1.24
NX-OD3153
NX-OD3256
NX-OD3257
NX-OD3268
NX-OD4121
NX-OD4256
NX-OD5121
NX-OD5121-1
NX-OD5121-5
NX-OD5256
NX-OD5256-1
NX-OD5256-5
NX-OD6121-5
NX-OD6121-6
NX-OD6256-5
NX-OC2633
NX-OC2733
NX-OC4633
NX-MD6121-5
NX-MD6121-6
NX-MD6256-5

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