Omron EJ1G Datasheet

Modular Temperature Controller for Gradient Temperature Control
EJ1G
Gradient Temperature Control to Achieve
Consistent Layer Temperature
• Perform gradient temperature control ranging from 2 to 32
channels.
• Perform 2-channel gradient temperature control for up to 16
groups, or 32-channel gradient temperature control for up to 2
groups.
• Set gradient temperature control or 2-PID control for each
group.
• Reduce design work for ladder programming with programless
connections to Programmable Controllers. (The same feature
as Standard-control EJ1 Models.)
• Connect directly to the G3ZA Multi-channel Power Controller
using optimum cycle control for high-accuracy control with
minimal noise.
Refer to the "Safety Precautions" on page 18.

Ordering Information

■ Temperature Controllers
Gradient Temperature Control
Name Power No. of
supply con-
voltage trol
points
Basic Unit 24 VDC 2 Voltage
(gradient supplied output:
tempera- from the 2 points (for
ture End Unit SSR drive)
control) (See note
4
(See note 2.)
1.)
HFU None None
(gradient
tempera-
ture con-
trol)
(See note
1.)
End Unit 24 VDC
(See note
1.)
Note: 1. An End Unit is required to connect an HFU to a Basic Unit. A Gradient Temperature Control HFU and a Gradient Temperature Control
Basic Unit must be used together to achieve gradient temperature control. The Gradient Temperature Control HFU and Gradient
Temperature Control Basic Unit are used exclusively for gradient temperature control, but the End Unit is the same as that used for the
Standard-control EJ1 Models.
The Basic Unit cannot communicate externally by itself.
2. Heating/cooling control is not supported for gradient temperature control.
3. When using the heater burnout alarm, use a Current Transformer (E54-CT1 or E54-CT3) (sold separately).
Refer to the following manual for precautionary information and other information necessary to use the EJ1G:
EJ1G Modular Temperature Controller Operation Manual (Cat. No. H143)
Control Control Auxiliary
outputs outputs output
1 and 2 3 and 4
Transistor None
output: 2
points
(sourcing)
Voltage out-
put: 2 points
(for SSR
drive) (See
note 2.)
None Transistor
output:
4 points
(sourcing)
Transistor
output:
2 points
(sourcing)
Modular Temperature Controller for Gradient Temperature Control
Functions Communications
functions
Heater Event
burnout inputs
alarm
2 None G3ZA connection
(See port: RS-485
note 3.)
From End Unit:
Port A: RS-485
None
4 From End Unit:
Port A: RS-485
Port C: RS-485 or
RS-232C
selectable.
From End Unit:
Port A: RS-485
Port C: RS-422
None Port A: RS-485
Connector: Port A
Input type Terminal
Thermocou- M3 terminal EJ1G-TC2A-QNH
ple, platinum
Screw-less EJ1G-TC2B-QNH
resistance
clamp
thermometer,
analog voltage,
M3 terminal EJ1G-TC4A-QQ
and analog
current select-
Screw-less EJ1G-TC4B-QQ
able for each
clamp
channel.
No input M3 terminal EJ1G-HFUA-NFLK
Screw-less EJ1G-HFUB-NFLK
clamp
M3 terminal EJ1G-HFUA-NFL2
Screw-less EJ1G-HFUB-NFL2
clamp
M3 terminal EJ1C-EDUA-NFLK
EJ1G
Model
1