Omron EJ1N-TC4 Manual

Modular Temperature Controller
EJ1
In-panel Temperature Controller with Flexible
Modular Design and Wide 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 universal-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.
• Autotuning (AT) can be used for independent heating/cooling PID control.
• Self-tuning (ST) can be used to calculate the PID constants with the step
response method.
• Up to 16 Temperature Controllers can be connected to a single
DeviceNet Communications Unit.

Ordering Information

Temperature Controller
Standard Control Models
Power No. of
Name supply control
voltage points
Basic Unit 24 VDC 2
(temperature supplied
control) *1
from the
End Unit
V1.2
4
2
HFU with None
Programless
Communications
*1
V1.2
HFU with
DeviceNet
Communications
*1
End Unit *1
24 VDC
*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.
Functional Upgrades
Refer to page 17 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)
Control Control
Auxiliary
outputs outputs
output
1 and 2 3 and 4
Voltage Transistor None
output: output: 2 points
2 points (sinking)
(for SSR
drive) *2
Voltage output:
2 points (for
SSR drive) *2
Current Transistor
output: output: 2 points
2 points (sinking)
None None Transistor
output:
4 points
(sinking)
None
Transistor
output:
2 points
(sinking)
Supports DeviceNet Communications.
Functions
Communications
Heater
Event
functions
burnout
inputs
alarm
2 *3
2 G3ZA connection Thermocouple,
port: RS-485 platinum
From End Unit: resistance
Port A or port B: thermometer,
None None RS-485 analog
voltage, and
analog current
selectable for
2 each channel.
4 Port C: RS-485 or No input
RS-232C
selectable.
From End Unit:
Port A: RS-485
Port C: RS-422
From End Unit:
Port A: RS-485
None DeviceNet
communications
None Port A or B: RS-
485
Connector: Port A
CSM_EJ1_DS_E_4_2
Refer to the "Safety Precautions" on
page 20.
Input type Terminal Model
M3 terminal EJ1N-TC2A-QNHB
Screw-less
EJ1N-TC2B-QNHB
clamp
M3 terminal EJ1N-TC4A-QQ
Screw-less
EJ1N-TC4B-QQ
clamp
M3 terminal EJ1N-TC2A-CNB
Screw-less
EJ1N-TC2B-CNB
clamp
M3 terminal EJ1N-HFUA-NFLK
Screw-less
clamp
EJ1N-HFUB-NFLK
M3 terminal EJ1N-HFUA-NFL2
Screw-less
EJ1N-HFUB-NFL2
clamp
Screw-less
clamp
EJ1N-HFUB-DRT
M3 terminal EJ1C-EDUA-NFLK
Detachable
EJ1C-EDUC-NFLK
connector
1