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
2Voltage
output:
2 points (for
SSR drive)
(See note 2.)
Transistor out-
put: 2 points
(sinking)
None 2
(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)
4
(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)
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