CSM_EJ1_DS_E_4_2
1
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
*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.
Supports DeviceNet Communications.
Refer to the “Safety Precautions” on
page 20.
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) *1
24 VDC
supplied
from the
End Unit
2 Voltage
output:
2 points
(for SSR
drive) *2
Transistor
output: 2 points
(sinking)
None 2 *3 2 G3ZA connection
port: RS-485
From End Unit:
Port A or port B:
RS-485
Thermocouple,
platinum
resistance
thermometer,
analog
voltage, and
analog current
selectable 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
2Current
output:
2 points
Transistor
output: 2 points
(sinking)
2 M3 terminal EJ1N-TC2A-CNB
Screw-less
clamp
EJ1N-TC2B-CNB
HFU with
Programless
Communications
*1
None None None Transistor
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
Communications
*1
None None DeviceNet
communications
Screw-less
clamp
EJ1N-HFUB-DRT
End Unit *1 24 VDC Transistor
output:
2 points
(sinking)
None Port A or B: RS-
485
Connector: Port A
M3 terminal EJ1C-EDUA-NFLK
Detachable
connector
EJ1C-EDUC-NFLK
V1.2
V1.2
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)
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