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Modular Temperature Controller

 EJ1

1

Modular Temperature Controller

EJ1

In-panel Temperature Controller with 
Flexible Modular Design for Greater 
Integration with Host Devices

• The compact modular structure enables construction of 

temperature systems optimally suited to the application.

• Connection can be made to a Programmable Controller without 

any programming required, reducing the number of steps 
required in ladder programming design.

• One fully multi-input Unit includes a thermocouple, platinum-

resistance thermometer, and analog input for easy selection 
and reduced inventory requirements.

• Connect directly to the G3ZA Multi-channel Power Controller 

using optimum cycle control for high-accuracy regulation with 
minimal noise.

• Improved functionality to enable connecting more devices with 

programless communications. 
Connect multiple Controllers to one PLC.

Refer to the 

Safety Precautions

 on page 21.

Models with current outputs added.

Functionality improved for Basic Units and HFU

Ordering Information

Temperature Controller

Standard Control Models

Note:

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.

4.

There are three operation instructions that can be sent to Basic Units connected to an HFU. 

Functional Upgrades

Refer to page 17 for details.

Upgrade functions are marked with “V1.1”.

Name

Power 

supply 

voltage

No. of 

control 

points

Control 

outputs 

1 and 2

Control 

outputs 

3 and 4

Auxiliary

output

Functions

Communications

functions

Input type

Terminal

Model

Heater 

burnout 

alarm

Event 

inputs

Basic Unit 
(temperature 
control)
(See note 1.)

24 VDC 
supplied 
from the 
End Unit

2

Voltage
output: 
2 points (for 
SSR drive) 
(See note 2.)

Transistor out-
put: 2 points 
(sinking)

None


(See note 
3.)

2

G3ZA connection 
port: RS-485
From End Unit:
Port A or port B: 
RS-485

Thermocouple, 
platinum resis-
tance thermome-
ter, analog 
voltage, and ana-
log current se-
lectable for each 
channel.

M3 terminal

EJ1N-TC2A-QNHB

Screw-less 
clamp

EJ1N-TC2B-QNHB

4

Voltage output: 
2 points (for 
SSR drive) 
(See note 2.)

None

None

M3 terminal

EJ1N-TC4A-QQ

Screw-less 
clamp

EJ1N-TC4B-QQ

2

Current 
output: 
2 points

Transistor out-
put: 2 points 
(sinking)

2

M3 terminal

EJ1N-TC2A-CNB 

Screw-less 
clamp

EJ1N-TC2B-CNB 

 HFU
(See note 1.)

None

None

None

Transistor 
output: 
4 points (sink-
ing)


(See note 
4.)

From End Unit:
Port A: RS-485
Port C: RS-485 or 
RS-232C 
selectable.

No input

M3 terminal

EJ1N-HFUA-NFLK

Screw-less 
clamp

EJ1N-HFUB-NFLK

From End Unit:
Port A: RS-485
Port C: RS-422

M3 terminal

EJ1N-HFUA-NFL2

Screw-less 
clamp

EJ1N-HFUB-NFL2

End Unit 
(See note 1.)

24 VDC

Transistor 
output: 
2 points (sink-
ing)

None

Port A or B: RS-485
Connector: Port A

M3 terminal

EJ1C-EDUA-NFLK

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

Summary of Contents for EJ1N-TC2

Page 1: ...se a Current Transformer E54 CT1 or E54 CT3 separately 4 There are three operation instructions that can be sent to Basic Units connected to an HFU Functional Upgrades Refer to page 17 for details Upg...

Page 2: ...urrent input 150 max voltage input 1 M 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 operati...

Page 3: ...s 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 output setting range 1 999 to 9 999 dec...

Page 4: ...r 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...

Page 5: ...0 mA 0 to 20 mA 1 to 5 V 0 to 5 V 0 to 10 V Tem pera ture range C 2300 1800 1700 1600 1500 1400 1300 1200 1100 1000 900 800 700 600 500 400 300 200 100 0 100 0 200 0 2300 Any of the following ranges b...

Page 6: ...h no condensation Insulation resistance 20 M 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...

Page 7: ...icing or condensation Ambient humidity range Operating 25 to 85 with no condensation Insulation resistance 20 M min at 500 VDC Dielectric strength 600 VAC 50 60 Hz for 1 min between current carrying t...

Page 8: ...ON SW2 2 1 3 4 5 6 7 8 EJ1 TC4 0 1 2 3 4 5 6 7 8 9 A BCDE F PC PLC PT PC EJ1N TC4 or EJ1N TC2 EJ1C EDU Port A connector USB connection can be made with the E58 CIFQ1 sold separately CX Thermo for sett...

Page 9: ...SW1 ERROR OCC SD RD READY SW2 SW1 ERROR OCC SD RD READY G3ZA G3ZA PC EJ1N HFU PLC EJ1N TC4 or EJ1N TC2 EJ1C EDU Port B RS 232C Port B is used for distributed placement Port A connector USB connection...

Page 10: ...3 PWR RUN ERR ALM SW1 ON SW2 2 1 3 4 5 6 7 8 EJ1 TC4 0 1 2 3 4 5 6 7 8 9 A B C DEF COM1 COM2 COM3 PWR RUN ERR ALM SW1 ON SW2 2 1 3 4 5 6 7 8 EJ1 HFU 0 1 2 3 4 5 6 7 8 9 A B C DEF CX Thermo for setting...

Page 11: ...M3 PWR RUN ERR ALM SW1 ON SW2 2 1 3 4 5 6 7 8 EJ1 TC4 0 1 2 3 4 5 6 7 8 9 A BCDE F EJ1C EDU Up to 8 G3ZA Power Controllers can be connected to one Basic Unit EJ1N TC4 or EJ1N TC2 G3ZA G3ZA connection...

Page 12: ...ALM SW1 ON SW2 2 1 3 4 5 6 7 8 EJ1 HFU 0 1 2 3 4 5 6 7 8 9 A BCDE F EJ1N HFU EJ1C EDU Name Model No Communications ports Port 1 Port 2 Serial Communications Units CJ1W SCU21 V1 RS 232C RS 232C CJ1W SC...

Page 13: ...nel 1 Channel 2 Q compatible Serial Communications Unit QJ71C24N QJ71C24 RS 232C RS 422 485 QJ71C24N R2 QJ71C24 R2 RS 232C RS 232C QJ71C24N R4 RS 422 485 RS 422 485 QnA compatible Serial Communication...

Page 14: ...The Temperature Controller can be connected to a computer using USB 3 Models with screw less clamp terminals have terminals A10 and B10 but they are not used Do not connect anything to them 12 VDC 12...

Page 15: ...ors COM1 COM2 COM3 Operation Indicators PWR RUN ERR ALM SW1 SW2 Operation Indicators Meaning PWR green Lit while the power is ON RUN green Lit during operation ERR red Flashes or lights when an error...

Page 16: ...e factory setting is unit number 01 SW2 Settings EJ1N TC2 TC4 EJ1N HFU SW2 SW1 1 2 0 1 2 3 4 5 6 7 8 9 A B C D E F OFF OFF 00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 ON OFF 16 17 18 19 20 21 22 2...

Page 17: ...d for programless up down setting has been increased to 600 each Connection now possible to MELSEC QnA An AnS FX3uc series PLCs A new setting read operation has been added to programless communication...

Page 18: ...OM2 COM3 PWR RUN ERR ALM SW1 ON SW2 2 1 3 4 5 6 7 8 0 1 2 3 4 5 6 7 8 9 A B C DEF COM1 COM2 COM3 EJ1N EJ1N PWR RUN ERR ALM SW1 ON SW2 2 1 3 4 5 6 7 8 109 Models with screw terminal blocks 104 85 Model...

Page 19: ...rox 6 dia E54 CT3 Accessory Armature Plug Rail Mounting Equipment Order Separately DIN Rail PFP 100N PFP 50N Note The figures in parentheses are dimensions for the PFP 50N 4 5 15 25 25 10 10 1000 500...

Page 20: ...hase Ultra compact and slim model combined with a heat radiator Rated input voltage 12 to 24 VDC 240 VAC 15 A 25 A 35 A or 45 A 480 VAC 15 A 25 A 35 A or 45 A G3PB Three Phase Three phase batch contro...

Page 21: ...ON power to the product 14 Never touch the electronic components connectors or patterns on product boards with your bare hands Always hold the product by the case Inappropriately handling the product...

Page 22: ...cy 1 When extending or connecting the thermocouple lead wire be sure to use compensating wires that match the thermocouple types 2 When extending or connecting the lead wire of the platinum resistance...

Page 23: ...50 cm Connecting to the G3ZA EJ1N TC Refer to the G3ZA Instruction Manual for wiring methods Lower the lever Pull out 1 Lower the hooks 3 Press in on the Unit 2 Catch the upper hook onto the DIN Rail...

Page 24: ...ent or addition to the above warranty See http oeweb omron com or contact your Omron representative for pub lished information 14 Limitation on Liability Etc OMRON COMPANIES SHALL NOT BE LIABLE FOR SP...

Page 25: ...nquiries 800 556 6766 OMRON CANADA INC 885 Milner Avenue Toronto Ontario M1B 5V8 Tel 416 286 6465 MEXICO SALES OFFICES Mexico D F 555 660 3144 Ciudad Ju rez 656 623 7083 Monterrey N L 818 377 4281 Que...

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