OMRON NX-ECS[][][]Automation Systems/ Machine Automation Controllers/NX-series I/O System

OMRON NX-ECS[][][] Automation Systems

NX-ECS[][][] NX-series SSI Input Unit/Specifications
NX-ECS[][][] NX-series SSI Input Unit/Catalog
NX-ECS[][][] NX-series SSI Input Unit/Lineup
NX-ECS[][][] NX-series SSI Input Unit/Dimensions
Purchase the OMRON NX-ECS[][][] NX-series I/O System

OMRON NX-ECS[][][] Dimensions

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last update: March 1, 2017

• SSI clock frequency up to 2 MHz

• High-speed remote I/O control with communications cycle as fast as 125 μs*1

• Free-run refreshing, synchronous I/O refreshing, or task period prioritized refreshing*2 with the NX1P2 CPU Unit or EtherCAT Coupler Unit

• The MC Function Modules of the NJ/NX/NY5 Controllers allows the encoder to be used as a motion axis

• Choice of SSI Coding Methods (No conversion, binary code, or gray code)

• Time Stamping

• Multi-turn and single-turn encoders supported

• Data Refresh Status (Data refreshing can be checked on the host controller.)

• Maximum connecting SSI cable length: 400 m

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

*1. When using the NX-EC01[][] together with the NX701-[][][][] and NX-ECC203.
*2. Task Period Prioritized refreshing is available when the NX-ECC203 is used together.

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-ECS[][][] specification
NX-ECS[][][] NX-series SSI Input Unit/Specifications
last update: August 1, 2018
General Specification

Item Specification
Enclosure Mounted in a panel
Grounding method Ground to less than 100 Ω
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 Pollution degree 2 or less: Conforms to JIS B3502 and IEC 61131-2.
Noise immunity Conforms to IEC61000-4-4, 2 kV (power supply line)
Overvoltage category Category II: Conforms to JIS B3502 and IEC 61131-2.
EMC immunity level Zone B
Vibration resistance 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 Conforms to IEC 60068-2-27. 147 m/s², 3 times each in X, Y, and Z directions
Applicable standards * cULus: Listed (UL508) or Listed (UL 61010-2-201), ANSI/ISA 12.12.01,
EU: EN 61131-2, C-Tick or RCM, KC Registration, NK, LR

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

SSI Input Unit Specifications
SSI Input Unit 1 channel NX-ECS112

Unit name SSI Input Unit Model NX-ECS112
Number of channels 1 channel Type of external
connections Screwless push-in terminal block
(12 terminals)
I/O refreshing method Free-Run refreshing, synchronous I/O refreshing or task period prioritized refreshing *1
Indicators Input signals External inputs: 2 Data input (D+, D-)
External outputs: 2 Clock output (C+,
C-)
I/O interface Synchronized serial interface (SSI)
Clock output EIA standard RS-422-A line driver levels
Data input EIA standard RS-422-A line receiver levels
Maximum data length 32 bits (The single-turn, multi-turn, and status data length can be set.)
Coding method No conversion, binary code, or gray code
Baud Rate 100 kHz, 200 kHz, 300 kHz, 400 kHz, 500 kHz, 1.0 MHz, 1.5 MHz, or 2.0 MHz
Dimensions 12 × 100 × 71 mm
(W × H × D) Isolation method Digital isolator
Insulation resistance 20 MΩ min. between isolated
circuits (at 100 VDC) Dielectric
strength 510 VAC between isolated circuits for
1 minute with leakage current of 5 mA
max.
I/O power supply
source Supplied from the NX bus.
20.4 to 28.8 VDC
(24 VDC +20%/-15%) Current capacity
of I/O power
supply terminals IOV: 0.3 A max. per terminal
IOG: 0.3 A max. per terminal
NX Unit power
consumption • Connected to a CPU Unit
1.20 W max.
• Connected to a Commu-
nications Coupler Unit
0.85 W max. Current
consumption from
I/O power supply 20mA
Maximum transmission
distance *2 Baud Rate Maximum transmission distance
100 kHz 400m
200 kHz 190m
300 kHz 120m
400 kHz 80m
500 kHz 60m
1.0 MHz 25m
1.5 MHz 10m
2.0 MHz 5m
Weight 65g
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
Failure detection None Protection None

*1. The I/O refreshing method is automatically set according to the connected Communications Coupler Unit and CPU
Unit.
Refer to information on the I/O refreshing methods in the W524 manual for the communications cycles for each
model.
*2. The maximum transmission distance for an SSI Input Unit depends on the baud rate due to the delay that can result
from the responsiveness of the connected encoder and cable impedance. The maximum transmission distance is
only a guideline. Review the specifications for the cables and encoders in the system and evaluate the operation of
the equipment before use.

SSI Input Unit 2 channel NX-ECS212

Unit name SSI Input Unit Model NX-ECS212
Number of channels 2 channels Type of external
connections Screwless push-in terminal block
(12 terminals)
I/O refreshing method Free-Run refreshing, synchronous I/O refreshing or task period prioritized refreshing *1
Indicators Input signals External inputs: 2 Data input (D+, D-)
External outputs: 2 Clock output (C+,
C-)
I/O interface Synchronized serial interface (SSI)
Clock output EIA standard RS-422-A line driver levels
Data input EIA standard RS-422-A line receiver levels
Maximum data length 32 bits (The single-turn, multi-turn, and status data length can be set.)
Coding method No conversion, binary code, or gray code
Baud Rate 100 kHz, 200 kHz, 300 kHz, 400 kHz, 500 kHz, 1.0 MHz, 1.5 MHz, or 2.0 MHz
Dimensions 12 × 100 × 71 mm
(W × H × D) Isolation method Digital isolator
Insulation resistance 20 MΩ min. between isolated
circuits (at 100 VDC) Dielectric
strength 510 VAC between isolated circuits for
1 minute with leakage current of 5 mA
max.
I/O power supply
source Supplied from the NX bus.
20.4 to 28.8 VDC
(24 VDC +20%/-15%) Current capacity
of I/O power
supply terminals IOV: 0.3 A max. per terminal
IOG: 0.3 A max. per terminal
NX Unit power
consumption • Connected to a CPU Unit
1.25 W max.
• Connected to a Commu-
nications Coupler Unit
0.9 W max. Current
consumption from
I/O power supply 30mA
Maximum transmission
distance *2 Baud Rate Maximum transmission distance
100 kHz 400m
200 kHz 190m
300 kHz 120m
400 kHz 80m
500 kHz 60m
1.0 MHz 25m
1.5 MHz 10m
2.0 MHz 5m
Weight 65g
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
Failure detection None Protection None

*1. The I/O refreshing method is automatically set according to the connected Communications Coupler Unit and CPU
Unit.
Refer to information on the I/O refreshing methods in the W524 manual for the communications cycles for each
model.
*2. The maximum transmission distance for an SSI Input Unit depends on the baud rate due to the delay that can result
from the responsiveness of the connected encoder and cable impedance. The maximum transmission distance is
only a guideline. Review the specifications for the cables and encoders in the system and evaluate the operation of
the equipment before use.

Version Information
Connected to a CPU Unit

Refer to the user's manual for the CPU Unit 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-ECS112 Ver. 1.0 Ver. 1.13 Ver. 1.17
Ver. 1.1
Ver. 1.2
NX-ECS212 Ver. 1.0 Ver. 1.13 Ver. 1.17
Ver. 1.1
Ver. 1.2

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-ECS112 Ver. 1.0 Ver. 1.1 *1 Ver. 1.06 *1 Ver. 1.07
Ver. 1.1 Ver. 1.08
Ver. 1.2 Ver. 1.3 *2*3 Ver. 1.13
NX-ECS212 Ver. 1.0 Ver. 1.1 *1 Ver. 1.06 *1 Ver. 1.07
Ver. 1.1 Ver. 1.08
Ver. 1.2 Ver. 1.3 *2*3 Ver. 1.13

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.
*1. You can use the following versions if time stamp refreshing is not used.
*2. To use task period prioritized refreshing, you must use the NX-ECC203.
*3. If you do not use task period prioritized refreshing, you can use EtherCAT Coupler Units which support Position Interface Units with unit version 1.1 or earlier.
*4. If you do not use task period prioritized refreshing, you can use EtherCAT Coupler Units with unit version 1.0.

Connected to an EtherNet/IP Coupler Unit

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-ECS112 Ver. 1.0 Ver. 1.2 Ver. 1.14 Ver. 1.19 Ver. 1.0 Ver. 1.10 Ver. 1.00
Ver. 1.1
Ver. 1.2 Ver. 1.13
NX-ECS212 Ver. 1.0 Ver. 1.2 Ver. 1.14 Ver. 1.19 Ver. 1.0 Ver. 1.10 Ver. 1.00
Ver. 1.1
Ver. 1.2 Ver. 1.13

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.
Note: 2. You cannot connect the relevant NX Unit or use the relevant NX Unit function if “---” is shown in the corresponding unit versions/versions column.
*1. Refer to the user's manual of the EtherNet/IP Coupler Unit for the unit versions of EtherNet/IP Units corresponding to EtherNet/IP Coupler Units.
*2. Refer to the user's manual of the EtherNet/IP Coupler Unit for the unit versions of CPU Units and EtherNet/IP Units corresponding to 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.

last update: August 1, 2018

OMRON NX-ECS[][][] catalog
NX-ECS[][][] NX-series SSI Input 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-EC0/ECS/PG0 Data Sheet -
[7485KB] Aug 01, 201820180801 NX-EC0/ECS/PG0 Data Sheet

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

OMRON NX-ECS[][][] lineup
NX-ECS[][][] NX-series SSI Input Unit/Lineup
last update: August 1, 2018
Applicable standards

Refer to the OMRON website (www.ia.omron.com) or ask your OMRON representative for the most recent applicable standards for each model.

Position Interface: SSI Input Units

Product
name Specification Model
Number
of
channels Input/
Output
form Maximum
data
length Encoder
power
supply Type of
external
connections
SSI Input
Units
1 EIA standard
RS-422-A 32 bits 24 VDC,
0.3 A/CH Screwless push-
in terminal block
(12 terminals) NX-ECS112
2 EIA standard
RS-422-A 32 bits 24 VDC,
0.3 A/CH Screwless push-
in terminal block
(12 terminals) NX-ECS212

Optional Products

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

Product name Specification Model
No. of
terminals Terminal number
indications Ground
terminal mark Terminal current
capacity
Terminal Block 12 C/D None 10 A NX-TBB122

Accessories

Not included.

last update: August 1, 2018

OMRON NX-ECS[][][] dimension
NX-ECS[][][] NX-series SSI Input Unit/Dimensions
last update: January 22, 2018

(Unit: mm)

Screwless Clamping Terminal Block Type
12 mm Width

last update: January 22, 2018

NO. NX-ECS[][][]

TYPE:Machine Automation Controllers NX-series I/O System Position Interface Unit

DATE:2021-06-14

Associated products:
NX-PG0[][][] NX-series Pulse Output Unit/Features NX-ILM400 NX-series IO-Link Master Unit/Features

Item	Specification
Enclosure	Mounted in a panel
Grounding method	Ground to less than 100 Ω
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	Pollution degree 2 or less: Conforms to JIS B3502 and IEC 61131-2.
Noise immunity	Conforms to IEC61000-4-4, 2 kV (power supply line)
Overvoltage category	Category II: Conforms to JIS B3502 and IEC 61131-2.
EMC immunity level	Zone B
Vibration resistance	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	Conforms to IEC 60068-2-27. 147 m/s², 3 times each in X, Y, and Z directions
Applicable standards *	cULus: Listed (UL508) or Listed (UL 61010-2-201), ANSI/ISA 12.12.01, EU: EN 61131-2, C-Tick or RCM, KC Registration, NK, LR

Unit name	SSI Input Unit	Model	NX-ECS112
Number of channels	1 channel	Type of external connections	Screwless push-in terminal block (12 terminals)
I/O refreshing method	Free-Run refreshing, synchronous I/O refreshing or task period prioritized refreshing *1
Indicators		Input signals	External inputs: 2 Data input (D+, D-) External outputs: 2 Clock output (C+, C-)
I/O interface	Synchronized serial interface (SSI)
Clock output	EIA standard RS-422-A line driver levels
Data input	EIA standard RS-422-A line receiver levels
Maximum data length	32 bits (The single-turn, multi-turn, and status data length can be set.)
Coding method	No conversion, binary code, or gray code
Baud Rate	100 kHz, 200 kHz, 300 kHz, 400 kHz, 500 kHz, 1.0 MHz, 1.5 MHz, or 2.0 MHz
Dimensions	12 × 100 × 71 mm (W × H × D)	Isolation method	Digital isolator
Insulation resistance	20 MΩ min. between isolated circuits (at 100 VDC)	Dielectric strength	510 VAC between isolated circuits for 1 minute with leakage current of 5 mA max.
I/O power supply source	Supplied from the NX bus. 20.4 to 28.8 VDC (24 VDC +20%/-15%)	Current capacity of I/O power supply terminals	IOV: 0.3 A max. per terminal IOG: 0.3 A max. per terminal
NX Unit power consumption	• Connected to a CPU Unit 1.20 W max. • Connected to a Commu- nications Coupler Unit 0.85 W max.	Current consumption from I/O power supply	20mA
Maximum transmission distance *2	Baud Rate	Maximum transmission distance
100 kHz	400m
200 kHz	190m
300 kHz	120m
400 kHz	80m
500 kHz	60m
1.0 MHz	25m
1.5 MHz	10m
2.0 MHz	5m
Weight	65g
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
Failure detection	None	Protection	None

Unit name	SSI Input Unit	Model	NX-ECS212
Number of channels	2 channels	Type of external connections	Screwless push-in terminal block (12 terminals)
I/O refreshing method	Free-Run refreshing, synchronous I/O refreshing or task period prioritized refreshing *1
Indicators		Input signals	External inputs: 2 Data input (D+, D-) External outputs: 2 Clock output (C+, C-)
I/O interface	Synchronized serial interface (SSI)
Clock output	EIA standard RS-422-A line driver levels
Data input	EIA standard RS-422-A line receiver levels
Maximum data length	32 bits (The single-turn, multi-turn, and status data length can be set.)
Coding method	No conversion, binary code, or gray code
Baud Rate	100 kHz, 200 kHz, 300 kHz, 400 kHz, 500 kHz, 1.0 MHz, 1.5 MHz, or 2.0 MHz
Dimensions	12 × 100 × 71 mm (W × H × D)	Isolation method	Digital isolator
Insulation resistance	20 MΩ min. between isolated circuits (at 100 VDC)	Dielectric strength	510 VAC between isolated circuits for 1 minute with leakage current of 5 mA max.
I/O power supply source	Supplied from the NX bus. 20.4 to 28.8 VDC (24 VDC +20%/-15%)	Current capacity of I/O power supply terminals	IOV: 0.3 A max. per terminal IOG: 0.3 A max. per terminal
NX Unit power consumption	• Connected to a CPU Unit 1.25 W max. • Connected to a Commu- nications Coupler Unit 0.9 W max.	Current consumption from I/O power supply	30mA
Maximum transmission distance *2	Baud Rate	Maximum transmission distance
100 kHz	400m
200 kHz	190m
300 kHz	120m
400 kHz	80m
500 kHz	60m
1.0 MHz	25m
1.5 MHz	10m
2.0 MHz	5m
Weight	65g
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
Failure detection	None	Protection	None

NX Unit	Corresponding unit versions/versions
Model	Unit version	CPU Unit	Sysmac Studio
NX-ECS112	Ver. 1.0	Ver. 1.13	Ver. 1.17
Ver. 1.1
Ver. 1.2
NX-ECS212	Ver. 1.0	Ver. 1.13	Ver. 1.17
Ver. 1.1
Ver. 1.2

NX Unit	Corresponding unit versions/versions
Model	Unit version	EtherCAT Coupler Unit	CPU Unit or Industrial PC	Sysmac Studio
NX-ECS112	Ver. 1.0	Ver. 1.1 *1	Ver. 1.06 *1	Ver. 1.07
Ver. 1.1	Ver. 1.08
Ver. 1.2	Ver. 1.3 23	Ver. 1.13
NX-ECS212	Ver. 1.0	Ver. 1.1 *1	Ver. 1.06 *1	Ver. 1.07
Ver. 1.1	Ver. 1.08
Ver. 1.2	Ver. 1.3 23	Ver. 1.13

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-ECS112	Ver. 1.0	Ver. 1.2	Ver. 1.14	Ver. 1.19	Ver. 1.0	Ver. 1.10	Ver. 1.00
Ver. 1.1
Ver. 1.2	Ver. 1.13
NX-ECS212	Ver. 1.0	Ver. 1.2	Ver. 1.14	Ver. 1.19	Ver. 1.0	Ver. 1.10	Ver. 1.00
Ver. 1.1
Ver. 1.2	Ver. 1.13

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-EC0/ECS/PG0 Data Sheet	- [7485KB]	Aug 01, 201820180801	NX-EC0/ECS/PG0 Data Sheet
NX-series I/O System Catalog	R183-E1-09 [6683KB]	Nov 01, 201820181101	NX-series I/O System Catalog

Product name	Specification	Model
Number of channels	Input/ Output form	Maximum data length	Encoder power supply	Type of external connections
SSI Input Units	1	EIA standard RS-422-A	32 bits	24 VDC, 0.3 A/CH	Screwless push- in terminal block (12 terminals)	NX-ECS112
2	EIA standard RS-422-A	32 bits	24 VDC, 0.3 A/CH	Screwless push- in terminal block (12 terminals)	NX-ECS212

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

Product name	Specification	Model
No. of terminals	Terminal number indications	Ground terminal mark	Terminal current capacity
Terminal Block	12	C/D	None	10 A	NX-TBB122

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