10
Modular Temperature Controller for Gradient Temperature Control
EJ1G
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Insulation Blocks
Each EJ1G Unit is electrically insulated for each function block as shown in the following figures.
Functional insulation is applied between the power supply, input, output, and communications terminal sections.
If reinforced double insulation is required, use power supplies that comply with IEC60664 for reinforced double insulation for the EJ1G's external
power supply and for power supplies connected to the EJ1G.
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Programless Communications
Communications with PLCs from OMRON (SYSMAC CS/CJ Series) and Mitsubishi Electric (MELSEC-Q/QnAS Series) can be performed without
creating ladder programming.
Using programless communications enables monitoring and changing settings for the EJ1G by simply reading and writing to PLC memory.
The EJ1G automatically performs communications with the PLC, which reduces work hours spent programming for communications from the PLC
to the EJ1G.
Connectable Devices
SYSMAC CS/CJ Series
Note:
Use only products manufactured on or after December 20,
1999.
For details, refer to the CS/CJ Series, Serial Communications
Boards/Units Operation Manual (Cat. No. W336).
MELSEC-Q/QnAS Series
Note: 1.
Refer to the Mitsubishi Electric manual for the MELSEC.
2.
Direct connections to the EJ1G are possible with RS-232C
and RS-422.
3.
Even when using RS-422, multiple Units cannot be
connected to the PLC.
Tests have verified that the EJ1G can be connected to the
Mitsubishi Electric models listed above, but design changes
and other factors may still prevent connection. Confirm
proper connect prior to building the system.
Power
supply
Transistor outputs 1 to 4
Communications (Port B, port C)
Functional isolation
Power
supply
Transistor outputs 1 to 2
Communications (Port A, port B)
Functional isolation
Input 1
Power
supply
Input 2
Communications (Port A, port B, G3ZA)
Transistor outputs 3 and 4
Voltage outputs 1 and 2
Functional isolation
EJ1G-HFU
Input 1
Power
supply
Input 2
Input 4
Voltage outputs 1 to 4
Communications (Port A, Port B, G3ZA)
Input 3
Functional isolation
EJ1G-TC2
EJ1G-TC4
EJ1C-EDU
PV
PLC
The read monitor value is
written to the PLC memory.
Manipulated variable
Status
SP
Monitor
Setting
Alarm value 1
Alarm value 2
EJ1G-HFU
The EJ1G-HFU automatically
performs communications
with the PLC.
The EJ1G-HFU reads the value
written to the PLC memory.
Monitoring can be
performed for the
EJ1G and the
settings can be
changed by simply
reading and writing
to memory.
PV
Manipulated variable
Status
SP
Alarm value 1
Alarm value 2
Name
Model No.
Communications ports
Port 1
Port 2
Serial
Communications
Unit
CJ1W-SCU21-V1
RS-232C
RS-232C
CJ1W-SCU41-V1
RS-422A/
485
RS-232C
CS1W-SCU21-V1
(See note.)
RS-232C
RS-232C
Serial
Communications
Board
CS1W-SCB21-V1
(See note.)
RS-232C
RS-232C
CS1W-SCB41-V1
(See note.)
RS-232C
RS-422A/
485
CPU Unit
CJ1 Series
---
RS-232C
CS1 Series
---
RS-232C
Name
Model No.
Communications
ports
Channel 1 Channel 2
Q-compatible
Serial
Communications
Unit
QJ71C24N
QJ71C24
RS-232C
RS-422/
485
QJ71C24N-R2
QJ71C24-R2
RS-232C
RS-232C
QJ71C24N-R4
RS-422/
485
RS-422/
485
QnAS-
compatible Serial
Communications
Unit
A1SJ71QC24N
RS-232C
RS-422/
485
A1SJ71QC24N-R2
RS-232C
RS-232C
