Omron EJ1N-TC4 Operation Manual

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.
Ordering Information
■ Temperature Controller
Standard Control Models
Name Power No. of
supply control
voltage points
Basic Unit 24 VDC 2 Voltage
(temperature supplied output:
control) from the 2 points (for
(See note 1.) End Unit SSR drive)
(See note 2.)
4
2
Current
output:
2 points
HFU None None
(See note 1.)
End Unit 24 VDC
(See note 1.)
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".
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)
Control Control Auxiliary
outputs outputs output
1 and 2 3 and 4
Transistor out- None
put: 2 points
(sinking)
Voltage output:
2 points (for
SSR drive)
(See note 2.)
Transistor out-
put: 2 points
(sinking)
None Transistor
output:
4 points (sink-
ing)
Transistor
output:
2 points (sink-
ing)
Models with current outputs added.
Functionality improved for Basic Units and HFU
Functions Communications
functions
Heater Event
burnout inputs
alarm
2 2 G3ZA connection
(See note port: RS-485
3.) From End Unit:
Port A or port B:
RS-485
None None
2
4 From End Unit:
(See note Port A: RS-485
4.) Port C: RS-485 or
RS-232C
selectable.
From End Unit:
Port A: RS-485
Port C: RS-422
None Port A or B: RS-485
Connector: Port A
Modular Temperature Controller
Input type Terminal
Thermocouple, M3 terminal EJ1N-TC2A-QNHB
platinum resis-
Screw-less EJ1N-TC2B-QNHB
tance thermome-
clamp
ter, analog
voltage, and ana-
M3 terminal EJ1N-TC4A-QQ
log current se-
lectable for each Screw-less EJ1N-TC4B-QQ
channel. clamp
M3 terminal EJ1N-TC2A-CNB
Screw-less EJ1N-TC2B-CNB
clamp
No input M3 terminal EJ1N-HFUA-NFLK
Screw-less EJ1N-HFUB-NFLK
clamp
M3 terminal EJ1N-HFUA-NFL2
Screw-less EJ1N-HFUB-NFL2
clamp
M3 terminal EJ1C-EDUA-NFLK
EJ1
Model
1