Omron EJ1G Datasheet page 17

I/O Devices
■ Examples of EJ1G-series Temperature Controllers Connected with
Temperature Sensors and SSRs
Input device/sensor
Analog quantities, such as temperature,
flow rate, and concentration
Converters, Digital Panel Meters, Flow Meters,
Infrared Thermosensors, Displacement Sensors,
etc.
ES1B
Infrared Thermosensor
ES2-HB Humidity Sensor
ES2-THB Temperature/Humidity Sensor
E52 Thermocouple/Platinum
Resistance Thermometer
• Concept behind the Number of SSRs That Can Be
Connected in Parallel
(A): The maximum load current for the voltage output
(to drive SSRs) for the Temperature Controller is
21 mA.
(B): The input impedance for SSRs is 7 mA (G3NA).
In this case, the number of SSRs that can be
connected in parallel is (A) ÷ (B), therefore 3.
The maximum load current in the connection example
is 21 mA.
Temperature controller
Voltage output
terminal
(for driving SSR)
EJ1G
EJ1G-TC2
PWR COM1 PWR COM1
RUN EJ1-TC2 COM2 RUN EJ1-TC2 COM2
ERR COM3 ERR COM3
ALM ALM
SW1 SW1
ON ON
SW2 SW2
Two-channel SSR outputs can be
connected to models with TC2.
The number of SSRs that can be
connected for each channel is listed
on the right.
EJ1G-TC4
PWR COM1 PWR COM1
RUN EJ1-TC2 COM2 RUN EJ1-TC2 COM2
ERR COM3 ERR COM3
ALM ALM
SW1 SW1
ON ON
SW2 SW2
Four-channel SSR outputs can be
connected to models with TC4.
The number of SSRs that can be
connected for each channel is listed
on the right.
Special Cable
G3ZA
Multi-channel Power Controller
SSR SSR
G3ZA
READY
SD/RD
SW1
OCC
SW2
ERROR
Eight Units max.*
*The G3ZA is available with 4 or 8 control points.
Modular Temperature Controller for Gradient Temperature Control
INPUT
Can be directly
connected.
Number of SSRs That Can
be Connected in Parallel
3
3
2
2
3*
*Four 480-V models
1
SSR SSR
4
SSR
Load
Heater
Load
LOAD power
supply
G3PC (SSR with failure detection)
240 VAC, 20 A
Rated input voltage:
12 to 24 VDC
Ultra-compact and slim
model combined with a
heat radiator
G3PB (Single Phase)
240 VAC, 15 A, 25 A, 35 A, or 45 A
480 VAC, 15 A, 25 A, 35 A, or 45 A
Rated input voltage:
12 to 24 VDC
Ultra-compact and slim
model combined with a
heat radiator
G3PB (Three Phase)
240 or 480 VAC, 15 A, 25 A, 35 A, or 45 A
Rated input voltage:
12 to 24 VDC
Three-phase batch
control combined with
heat radiator
G3PA
240 VAC, 10 A, 20 A, 40 A, or 60 A
400 VAC, 20 A, 30 A, or 50 A
Rated input voltage:
5 to 24 VDC
Ultra-compact and slim
model combined with a
heat radiator
G3NA
240 VAC, 5 A, 10 A, 20 A, 40 A, 75 A, or 90 A
480 VAC, 10 A, 20 A, 40 A, 75 A, or 90 A
Rated input voltage:
5 to 24 VDC
Standard model
with screw terminals
G3NE
240 VAC, 5 A, 10 A, or 20 A
Rated input voltage:
12 VDC
Compact low-cost
models with quick-
connect terminals
G3NH
440 VAC, 75 A or 150 A
Rated input voltage:
5 to 24 VDC
For high-power
heater control
EJ1G
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