OMRON EJ1 specification

last update: December 09, 2015

Basic Unit/EJ1N-TC

Ratings

Type		EJ1N-TC4	EJ1N-TC2
Power supply voltage		24 VDC
Operating voltage range		85% to 110% of rated voltage
Power consumption		5 W max. (at maximum load)	4 W max. (at maximum load)
Input *		Thermocouple: K, J, T, E, L, U, N, R, S, B, W, PLII ES1B Infrared Thermosensor: 10 to 70°C, 60 to 120°C, 115 to 165°C, 140 to 260°C Analog input: 4 to 20 mA, 0 to 20 mA, 1 to 5 V, 0 to 5 V, 0 to 10 V Platinum resistance thermometer: Pt100, JPt100
Input impedance		Current input: 150 Ω max., voltage input: 1 MΩ min.
Control outputs	Voltage output	Output voltage: 12 VDC ±15%, max. load current: 21 mA (PNP models with short-circuit protection circuit)
	Transistor output	---	Max. operating voltage: 30 V, max. load current: 100 mA
	Current output	---	Current output range: 4 to 20 mA or 0 to 20 mA DC Load: 500 Ω max. (including transfer output) (Resolution: Approx. 2,800 for 4 to 20 mA DC, approx. 3,500 for 0 to 20 mA DC)
Event inputs	Input points	---	2
	Contact input	---	ON: 1 kΩ max., OFF: 100 kΩ min.
	Non-contact input	---	ON: Residual voltage: 1.5 V max., OFF: Leakage current: 0.1 mA max.
Event inputs		---	Outflow current: Approx. 4 mA per point
Number of input and control points		Input points: 4, Control points: 4	Input points: 2, Control points: 2
Setting method		Via communications
Control method		ON/OFF control or 2-PID (with autotuning, self-tuning) [V1.2]
Other functions		Two-point input shift, digital input filter, remote SP, SP ramp, manual manipulated variable, manipulated variable limiter, interference overshoot adjustment, loop burnout alarm, RUN/ STOP, banks, I/O allocations, etc.
Ambient temperature range		Operating: -10°C to 55°C, Storage: -25°C to 65°C (with no icing or condensation)
Ambient humidity range		Operating: 25% to 85% (with no condensation)

* Inputs are fully universal. Therefore, platinum resistance thermometer, thermocouple, infrared thermosensor, and
    analog input can be selected.

Characteristics

Indication accuracy		Thermocouple input/platinum resistance thermometer input: (±0.5% of indication value (PV) or ±1°C, whichever is greater) ±1 digit max. *1 Analog input: ±0.5% FS ±1 digit max. CT input: ±5% FS ±1 digit max.
Hysteresis		0.1 to 999.9 EU (in units of 0.1 EU) *2
Proportional band (P)		0.1 to 999.9 EU (in units of 0.1 EU) *2
Integral time (I)		0 to 3,999 s (in units of 1 s)
Derivative time (D)		0.0 to 999.9 s (in units of 0.1 s)
Control period		0.5 s, 1 to 99 s (in units of 1 s)
Manual reset value		0.0% to 100.0% (in units of 0.1%)
Alarm setting range		-1,999 to 9,999 (decimal point position depends on input type)
Sampling period		250 ms
Influence of signal source resistance		Thermocouple: 0.1°C (0.2°F)/Ω max. (100 Ω max per line) *3 Platinum resistance thermometer: 0.4°C (0.8°F)/Ω max. (10 Ω max per line)
Insulation resistance		20 MΩ min. (at 500 VDC)
Dielectric strength		600 VAC, 50/60 Hz for 1 min between current-carrying terminals of different polarity
Vibration resistance		10 to 55 Hz, 20 m/s2 for 2 hours each in X, Y, and Z directions
Shock resistance		150 m/s2, 3 times each in 6 directions
Weight		180 g
Degree of protection		Rear case: IP20, Terminal section: IP00
Memory protection		EEPROM (non-volatile memory) (number of writes: 100,000)
Standards	Approved standards	UL61010C-1, CSA C22.2 No.1010-1
EMC Directive		EMI: EN61326 EMI Radiated: EN55011 Group1 class A EMI Conducted: EN55011 Group1 class A EMS: EN61326 ESD Immunity: EN61000-4-2 Electromagnetic Field Immunity: EN61000-4-3 Burst immunity/Noise Immunity: EN61000-4-4 Conducted Disturbance Immunity: EN61000-4-6 Surge Immunity: EN61000-4-5

*1. The indication of K thermocouples in the −200 to 1,300°C range, T and N thermocouples at a temperature of −100°C
       or less, and U and L thermocouples at any temperature is ±2°C ±1 digit maximum. The indication of B thermocouples
       at a temperature of 400°C or less is unrestricted. The indication of R and S thermocouples at a temperature of 200°C
       or less is ±3°C ±1 digit max.
       W = (±0.5% of indication value (PV) or ±3°C, whichever is greater) ±1 digit max. PLII = (±0.5% of indication value
       (PV) or ±2°C, whichever is greater) ±1 digit max.
       The indication accuracy for K thermocouples in the −199.9 to 999.9°C range [V1.2] is (±0.5% of indication value (PV)
       or ±1°C, whichever is greater) ±10 digit maximum. However, at a temperature of -100°C or less, it is ±2°C ±10 digit
       maximum.
*2. "EU" stands for Engineering Unit. The location of the decimal point depends on the type of sensor that is selected.
       If the decimal point locations is set to 0 (****), however, it will be treated as if it were set to 1 (***.*).
*3. B, R, S, and W sensors: 0.2°C/Ω max. (100 Ω max.)

Communications Specifications

Item	Port B *1	Port A Terminal/ Port A Connector *1	G3ZA Connection Port *2
Transmission path connection	RS-485 (multipoint)
Communications method	RS-485 (two-wire, half duplex)
Synchronization method	Start-stop synchronization
Communications protocol	CompoWay/F, Modbus *4 [V1.1]	CompoWay/F
Baud rate	9.6, 19.2, 38.4, 57.6, or 115.2 kbps	38.4 kbps fixed	57.6 kbps fixed
Transmission code	CompoWay/F: ASCII, Modbus: RTU	CompoWay/F: ASCII
Data bit length	7 or 8 bits	7 bits
Stop bit length	1 or 2 bits	2 bits
Error detection	Vertical parity (none, even, or odd)	Vertical parity (even)
	Block check character (BCC): with CompoWay/F, CRC-16: (with Modbus)
Flow control	None
Interface	RS-485
Retry function	None
Communications response wait time	0 to 99 ms (default: 5 ms) [V1.1]	1 to 99 ms (default: 1 ms)	---
Number of Units that can be connected in parallel *3	64 Units (model numbers with TC4: 256 channels, model numbers with TC2: 128 channels) Communications connection via port B on the End Unit	64 Units (model numbers with TC4: 256 channels, model numbers with TC2: 128 channels) Communications connection via port A on the End Unit	8 Units (Communications connection via G3ZA port on the Basic Unit)

*1. Connection from the EJ1C-EDU. When using an HFU, port B on the End Unit can be used for distributed placement
       only.
*2. A special cable (EJ1C-CBLA050) must be purchased separately for the G3ZA connection.
*3. For the number of Units that can be connected, refer to "Connection Precautions" on Catalog.
*4. The Modbus protocol can be used with Basic Unit with version 1.1 or higher.

Current Transformer (CT) Rating

Dielectric strength	1,000 VAC for 1 min
Vibration resistance	50 Hz, 98 m/s2
Weight	E54-CT1: Approx. 11.5 g, E54-CT3: Approx. 50 g
Accessories (E54-CT3 only)	Armatures (2), plugs (2)

Characteristics of the Heater Burnout Alarm, SSR Failure Alarm, and Heater Overcurrent Alarm (TC2[]-QNHB Model Only)

Maximum heater current	100 VAC
Input current indication accuracy	(±5.0A) ±1 digit max.
Heater burnout alarm setting range	0.1 to 99.9 A (in units of 0.1 A) 0.0 A: Heater burnout alarm output turns OFF. 100.0 A: Heater burnout alarm output turns ON. Min. detection ON time: 100 ms *1
SSR failure alarm setting range	0.1 to 99.9 A (in units of 0.1 A) 0.0 A: SSR failure alarm output turns ON. 100.0 A: SSR alarm output turns OFF. Min. detection OFF time: 100 ms *2
Heater overcurrent alarm setting range	0.1 to 99.9 A (in units of 0.1 A) 0.0 A: Heater overcurrent alarm output turns ON. 100.0 A: Heater overcurrent alarm output turns OFF. Min. detection ON time: 100 ms *1

*1. When the control output ON time is less than 100 ms, heater burnout detection, heater overcurrent detection, and
       heater current measurement are not performed.
*2. When the control output OFF time is less than 100 ms, SSR failure alarm and leakage current measurement are not
       performed.

Input Ranges

Sensor inputs are fully universal. Therefore, platinum resistance thermometer, thermocouple, infrared thermosensor, and analog input can be selected.
Inputs can be set for each channel using universal inputs.

Shaded ranges indicate default settings.
Applicable standards by input type are as follows:
K, J, T, E, N, R, S, B: JIS C1602-1995, IEC584-1
L: Fe-CuNi, DIN 43710-1985
U: Cu-CuNi, DIN 43710-1985
W: W5Re/W26Re, ASTM E988-1990
PL II: According to Platinel II Electromotive Force Table by Engelhard Corp.
JPt100: JIS C 1604-1989, JIS C 1606-1989
Pt100: JIS C 1604-1997 IEC 751

HFU Unit/EJ1N-HFU[]-NFL[]

Ratings

Power supply voltage		24 VDC
Operating voltage range		85% to 110% of rated voltage
Power consumption		2 W max. (at maximum load)
Auxiliary outputs *	Outputs	4
	Transistor outputs	Max. operating voltage: 30 VDC, Max. load current: 50 mA
Event inputs	Inputs	4
	Contact inputs	ON: 1 kΩ max., OFF: 100 kΩ min.
	Transistor inputs	ON: residual voltage of 1.5 max., OFF: leakage current of 0.1 mA max.
Event inputs		Outflow current: Approx. 4 mA (per contact)
Programless connection	Downloading (EJ1 reads data from a PLC)	Number of parameters that can be set: 1200 [V1.2]
	Uploading (EJ1 writes data to a PLC)	Number of parameters that can be set: 1200 [V1.2]
	Applicable PLCs	OMRON: CS/CJ/NJ Series Mitsubishi Electric: MELSEC-An/AnS/FX3UC Series [V1.1] Mitsubishi Electric: MELSEC-Q/QnA/QnAS Series
Ambient temperature range		Operating: -10°C to 55°C Storage: -25°C to 65°C (with no icing or condensation)
Ambient humidity range		Operating: 25% to 85% (with no condensation)

* Auxiliary outputs can be allocated using digital output allocations.

Characteristics

Insulation resistance		20 MΩ min. (at 500 VDC)
Dielectric strength		600 VAC, 50/60 Hz for 1 min between current-carrying terminals of different polarity
Vibration resistance		10 to 55 Hz, 20 m/s2 for 2 hours each in X, Y, and Z directions
Shock resistance		150 m/s2, 3 times each in 6 directions
Weight		160 g
Degree of protection		Rear case: IP20, Terminal section: IP00
Memory protection		EEPROM (non-volatile memory) (number of writes: 100,000)
Standards	Approved standards	UL61010C-1, CSA C22.2 No.1010-1
EMC Directive		Refer to Catalog.

Communications Characteristics: Port C

Transmission path connection	RS-485/RS-422: Multi-point, RS-232C: Point-to-point *1
Communications method	RS-485/RS-422 (two-wire, half duplex), RS-232C
Synchronization method	Start-stop synchronization
Communications protocol	OMRON PLC protocol (Connectable PLCs: SYSMAC CS/CJ/CP Series) AnA/AnU CPU common commands (Connectable PLCs: MELSEC-An/AnS/FX3UC Series) [V1.1] MC protocol (form 5) (Connectable PLCs: MELSEC-Q/QnA/QnAS Series)
Baud rate	9.6, 19.2, 38.4, 57.6, or 115.2 kbps
Transmission code	Binary
Data bit length	8 bits
Stop bit length	1 bit
Error detection	Depends on protocol selected for the programless communications protocol.
Flow control	None
Interface	RS-485, RS-422, RS-232C *1
Retry function	Available
Communications response wait time	0 to 99 ms (default: 5 ms) [V1.1]
Number of Basic Units that can be connected in parallel *2	32 Units (model numbers with TC4:128 channels max., model numbers with TC2:64 channels max.)
Number of HFUs that can be connected [V1.1]	CS/CJ/NJ-series PLCs: 8 (EJ1-HFU[]-NFLK) MELEC Q/QnA/QnAS-series PLCs: 8 (EJ1-HFU[]-NFL2)

*1. The communications method can be switched between RS-485 and RS-232C. A separate model must be used for
       RS-422 communications.
*2. For the number of Units that can be connected, refer to “Connection Precautions” on Catalog.

HFU Unit/EJ1N-HFUB-DRT

Ratings

Power supply voltage	DeviceNet power supply	24 VDC (for internal circuits)
	EDU power supply	24 VDC (for RS-485 communications circuits and Temperature Controllers)
Operating voltage range	DeviceNet power supply	11 to 25 VDC
	EDU power supply	20.4 to 26.4 VDC
Power consumption (at maximum load)		1 W max. (at maximum load)
Main functions		Remote I/O communications, explicit message communications, CompoWay/F command feed-through function, parameter backup function, and configuration registration
Ambient temperature range		Operating: -10°C to 55°C Storage: -25°C to 65°C (with no icing or condensation)
Ambient humidity range		Operating: 25% to 85% (with no condensation)

Characteristics

Insulation resistance		20 MΩ min. (at 500 VDC)
Dielectric strength		600 VAC, 50/60 Hz for 1 min
Vibration resistance		10 to 55 Hz, 10 m/s2 for 2 hours each in X, Y, and Z directions
Shock resistance		150m/s2 max. 3 times each in 3 axes, 6 directions
Weight		70 g max.
Degree of protection		IP20
Memory protection		EEPROM, 100,000 write operations (backup data)
Standards	Approved standards	UL61010-1, CSA C22.2 No.1010-1
EMC Directive		Refer to Catalog.

Communications Characteristics

Communications protocol		Conforms to DeviceNet.
Commu- nications functions	Remote I/O communications	Master-slave connections (polling, COS, or cyclic) Conforms to DeviceNet specifications.
	I/O allocation	Input and output data can be allocated freely by user with the Configurator. Allocations can be made to DeviceNet parameters or Temperature Controller parameters. Two blocks for IN Area, up to 100 words One block for OUT Area, up to 100 words (The first word is always allocated to the OUT Enable Bit.)
	Message communications	Explicit message communications CompoWay/F communications commands can be sent (commands are sent in explicit message format).
Connection format		Combination of multidrop and T-branch connections (for trunk and drop lines)
Baud rate		DeviceNet: 500, 250, or 125 kbps, or automatic detection of master baud rate
Communications media		Special 5-wire cable (2 signal lines, 2 power lines, and 1 shield line)
Communications distance		Baud rate	Network length	Drop line length	Total drop line length
		500 kbps	100 m max. (100 m max.)	6 m max.	39 m max.
		250 kbps	250 m max. (100 m max.)	6 m max.	78 m max.
		125 kbps	500 m max. (100 m max.)	6 m max.	156 m max.
		The values in parentheses apply when Thin Cables are used.
Communications power supply		11 to 25 VDC
Maximum number of nodes that can be connected		64 (includes Configurator when used.)
Maximum number of slaves that can be connected		63
Error control		CRC error detection
DeviceNet power supply		Power supplied from DeviceNet communications connector
Applicable Temperature Controllers		EJ1 Series (excluding the EJ1G) TC4: EJ1N-TC4A-QQ and EJ1N-TC4B-QQ TC2: EJ1N-TC2A-QNHB, EJ1N-TC2B-QNHB, EJ1N-TC2A-CNB, and EJ1N-TC2B-CNB
Maximum number of Temperature Controllers that can be connected *		16 Units (model numbers with TC4: 64 channels max., model numbers with TC2: 32 channels max.)

* For the number of Units that can be connected, refer to "Connection Precautions" on Catalog.

End Unit/EJ1C-EDU

Ratings

Power supply voltage		24 VDC
Operating voltage range		85% to 110% of rated voltage
Auxiliary output *	Outputs	2
	Transistor outputs	Max. operating voltage: 30 VDC, Max. load current: 50 mA
Ambient temperature range		Operating: -10°C to 55°C Storage: -25°C to 65°C (with no icing or condensation)
Ambient humidity range		Operating: 25% to 85% (with no condensation)

* Auxiliary output can be allocated using the bus output allocation for each Basic Unit.

Characteristics

Insulation resistance		20 MΩ min. (at 500 VDC)
Dielectric strength		600 VAC, 50/60 Hz for 1 min between current-carrying terminals of different polarity
Vibration resistance		10 to 55 Hz, 20 m/s2 for 2 hours each in X, Y, and Z directions
Shock resistance		150 m/s2, 3 times each in 6 directions
Weight		70 g
Degree of protection		End Unit case: IP20, Terminal section: IP00
Standards	Approved standards	UL61010C-1, CSA C22.2 No.1010-1
EMC Directive		Same as for the Basic Unit. Refer to Catalog.

Communications

Port B *1	Basic Unit Communications (Refer to "Communications Specifications" on Catalog.)
Port A	Basic Unit Communications (Refer to "Communications Specifications" on Catalog.)
Port A connector *2	E58-CIFQ1

*1. Port B communications for the End Unit cannot be used when port C communications for the HFU is used.
*2. Port A connector communications and port A terminal communications cannot be used at the same time.

last update: December 09, 2015

OMRON EJ1 lineup

last update: December 09, 2015

Temperature Controller

Standard Control Models

Name	Power supply volt- age	No. of con- trol points	Con- trol out- puts 1 and 2	Con- trol out- puts 3 and 4	Aux- iliary out- put	Functions		Commu- nications functions	Input type	Ter- minal	Model
						Heater burn- out alarm	E- vent in- puts
Basic Unit (tem- perature control) *1 [V1.2]	24 VDC supplied from the End Unit	2	Voltage output: 2 points (for SSR drive) *2	Tran- sistor output: 2 points (sinking)	None	2 *3	2	G3ZA connection port: RS-485 From End Unit: Port A or port B: RS-485	Thermo- couple, platinum resist- ance ther- mometer, analog voltage, and analog current selecta- ble for each channel.	M3 terminal	EJ1N-TC2A-QNHB
										Screw- less clamp	EJ1N-TC2B-QNHB
		4		Voltage output: 2 points (for SSR drive) *2		None	None			M3 terminal	EJ1N-TC4A-QQ
										Screw- less clamp	EJ1N-TC4B-QQ
		2	Current output: 2 points	Tran- sistor output: 2 points (sinking)			2			M3 terminal	EJ1N-TC2A-CNB
										Screw- less clamp	EJ1N-TC2B-CNB
HFU with Pro- gramless Commu- nications *1 [V1.2]		None	None	None	Tran- sistor output: 4 points (sinking)		4	Port C: RS-485 or RS-232C selectable. From End Unit: Port A: RS-485	No input	M3 terminal	EJ1N-HFUA-NFLK
										Screw- less clamp	EJ1N-HFUB-NFLK
								Port C: RS-422 From End Unit: Port A: RS-485		M3 terminal	EJ1N-HFUA-NFL2
										Screw- less clamp	EJ1N-HFUB-NFL2
HFU with DeviceNet Commu- nications *1					None		None	DeviceNet communi- cations		Screw- less clamp	EJ1N-HFUB-DRT
End Unit *1	24 VDC				Tran- sistor output: 2 points (sinking)		None	Port A or B: RS-485 Connector: Port A		M3 terminal	EJ1C-EDUA-NFLK
										De- tachable con- nector	EJ1C-EDUC-NFLK

*1. An End Unit is always required for connection to a Basic Unit or an HFU. An HFU cannot operate without a Basic Unit.
       External communications cannot be performed when using a Basic Unit only.
*2. For heating/cooling control applications, control outputs 3 and 4 on the 2-point models are used for the cooling or
       heating control outputs.
       On the 4-point models, heating/cooling control is performed for the two input points.
*3. When using the heater burnout alarm, purchase a Current Transformer (E54-CT1 or E54-CT3) separately.
Note: Products for the EtherCAT master are also available. Ask your OMRON sales representative for details.

Functional Upgrades

Refer to Catalog for details.
Upgrade functions are supported by the indicated version ("V1.1" or "V1.2") or a higher version of the software.

Refer to the following manual for precautionary information and other information necessary to use the EJ1:
EJ1 Modular Temperature Controller User’s Manual (Cat. No. H142)

EtherCAT® is registered trademark and patented technology, licensed by Beckhoff Automation GmbH, Germany.

Accessories (Order Separately)

Current Transformer (CT)

Diameter	Model
5.8 dia.	E54-CT1
12.0 dia.	E54-CT3

G3ZA Connecting Cable

Cable length	Model
5 m	EJ1C-CBLA050

Rail Mounting Equipment

Name	Model
Mounting Rail	PFP-100N
	PFP-50N

CX-Thermo Support Software Ver. 4.1

Model
EST2-2C-MV4

USB-Serial Conversion Cable

Model
E58-CIFQ1

last update: December 09, 2015

OMRON EJ1 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
EJ1 Data Sheet	- [4241KB]	Apr 02, 201820180402	EJ1 Data Sheet

OMRON EJ1 dimension

last update: August 22, 2013

Temperature Controller

Basic Units
EJ1N-TC

HFUs
EJ1N-HFU[]-NFL[]

HFUs
EJ1N-HFUB-DRT

End Units
EJ1C-EDU

Options

Current Transformer

E54-CT1

E54-CT3

E54-CT3 Accessory

Rail Mounting Equipment (Order Separately)

DIN Rail
PFP-100N
PFP-50N

* The figures in parentheses are dimensions for the PFP-50N.

End Plate
PFP-M

Note: Two screws are included with the EJ1C-EDU for the End Plate.
          Always attach End Plates to both sides.

last update: August 22, 2013

• NO. EJ1
• TYPE:Temperature Controllers Module Type Copyright Statement
• DATE:2021-06-14
• Associated products:
  E5L Electronic Thermostat/Features E5ZN Modular Temperature Controller/Features