Programless Communications - Omron EJ1G Datasheet

■ 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.
EJ1G-TC2
Input 1
Input 2
Power
Communications (Port A, port B, G3ZA)
supply
Transistor outputs 3 and 4
Voltage outputs 1 and 2
Functional isolation

■ 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.
Monitor
Monitoring can be
performed for the
EJ1G and the
settings can be
changed by simply Setting
reading and writing
to memory.
Connectable Devices
SYSMAC CS/CJ Series
Name Model No.
Serial CJ1W-SCU21-V1
Communications
CJ1W-SCU41-V1
Unit
CS1W-SCU21-V1
(See note.)
Serial CS1W-SCB21-V1
Communications (See note.)
Board
CS1W-SCB41-V1
(See note.)
CPU Unit CJ1 Series
CS1 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).
10
Modular Temperature Controller for Gradient Temperature Control
EJ1G-TC4
Power
supply
Functional isolation
PLC
The read monitor value is
PV
written to the PLC memory.
Manipulated variable
Status
The EJ1G-HFU automatically
performs communications
with the PLC.
SP
Alarm value 1
The EJ1G-HFU reads the value
Alarm value 2
written to the PLC memory.
Communications ports
Port 1 Port 2
RS-232C RS-232C
RS-422A/ RS-232C
485
RS-232C RS-232C
RS-232C RS-232C
RS-232C RS-422A/
485
--- RS-232C
--- RS-232C
Input 1
Input 2
Input 3
Input 4
Voltage outputs 1 to 4
Communications (Port A, Port B, G3ZA)
EJ1G-HFU
PV
Manipulated variable
Status
SP
Alarm value 1
Alarm value 2
MELSEC-Q/QnAS Series
Name
Q-compatible QJ71C24N
Serial QJ71C24
Communications
QJ71C24N-R2
Unit
QJ71C24-R2
QJ71C24N-R4
QnAS- A1SJ71QC24N
compatible Serial
Communications
A1SJ71QC24N-R2
Unit
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.
EJ1G-HFU
Transistor outputs 1 to 4
Power
supply
Communications (Port B, port C)
Functional isolation
EJ1C-EDU
Transistor outputs 1 to 2
Power
supply
Communications (Port A, port B)
Functional isolation
Model No. Communications
Channel 1 Channel 2
RS-232C
RS-232C
RS-422/
485
RS-232C
RS-232C
EJ1G
ports
RS-422/
485
RS-232C
RS-422/
485
RS-422/
485
RS-232C