Omron EJ1N-TC4 Operation Manual page 12

Restrictions on Unit Placement
Always connect the HFU on the left side of the Basic Unit.
PWR
RUN
ERR
ALM
SW1
SW2
EJ1N-TC4 or
EJ1N-TC2
■ Insulation Blocks
Each EJ1 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 EJ1's external
power supply and for power supplies connected to the EJ1.
EJ1N-TC2
Input 1
Input 2
Event inputs 1 and 2, CT1 and 2 (See note.)
Power
supply
Communications (Port A, port B, G3ZA)
Transistor outputs 3 and 4
Voltage outputs 1 and 2/Current outputs 1 and 2
Functional isolation
Note: Not provided on models with current outputs.
■ Programless Communications
Communications with PLCs from OMRON (SYSMAC CS/CJ/CP1H Series) and Mitsubishi Electric (MELSEC-Q/QnA/QnAS/An/Ans/FX
can be performed without creating ladder programming.
Using programless communications enables monitoring and changing settings for the EJ1 by simply reading and writing to PLC memory.
The EJ1 automatically performs communications with the PLC, which reduces work hours spent programming for communications from the PLC
to the EJ1.
Monitor
Monitoring can be
performed for the
EJ1 and the settings
can be changed by
simply reading and
Setting
writing to memory.
Connectable Devices
Connecting an EJ1 Controller 1:1 to a PLC
SYSMAC CS/CJ Series
Name
Serial Communications Units
Serial Communications Boards
CPU Units
Note: Use only products manufactured on or after December 20, 1999.
For details, refer to the CS/CJ Series, Serial Communications Boards Operation Manual (Cat. No. W336).
12
Modular Temperature Controller
COM1 PWR COM1
EJ1-TC4 COM2 RUN EJ1-HFU COM2
COM3 ERR COM3
ALM
SW1
ON ON
SW2
EJ1N-HFU
EJ1N-TC4
Power
supply
Functional isolation
PLC
The read monitor value is
PV
written to the PLC memory.
Manipulated variable
Status
The EJ1N-HFU automatically
performs communications
with the PLC.
SP
Alarm value 1
The EJ1N-HFU reads the value
Alarm value 2
written to the PLC memory.
Model No.
CJ1W-SCU21-V1
CJ1W-SCU31-V1
CJ1W-SCU41-V1
CS1W-SCU21-V1 (See note.)
CS1W-SCU31-V1
CS1W-SCB21-V1 (See note.)
CS1W-SCB41-V1 (See note.)
CJ1 Series
CS1 Series
CP1H Series
EJ1
Do not connect the End Unit directly to the HFU.
Always connect a Basic Unit to the End Unit.
Input 1
Input 2
Input 3
Input 4
Voltage outputs 1 to 4
Communications (Port A, Port B, G3ZA)
EJ1N-HFU
PV
Manipulated variable
Status
SP
Alarm value 1
Alarm value 2
Communications ports
Port 1
RS-232C
RS-422A/485
RS-422A/485
RS-232C
RS-422A/485
RS-232C
RS-232C
---
---
RS-232C or RS-422A/485 can be used by adding an Option Board.
PWR COM1
RUN EJ1-HFU COM2
ERR COM3
ALM
SW1
ON
SW2
EJ1N-HFU EJ1C-EDU
EJ1N-HFU
Event inputs 1 to 4
Power
Transistor outputs 1 to 4
supply
Communications (Port B, port C)
Functional isolation
EJ1C-EDU
Transistor outputs 1 and 2
Power
supply
Communications (Port A, port B)
Functional isolation
The EJ1N-HFU reads the monitor
value for the EJ1N-TC4/TC2.
The read setting is written to the
setting for the EJ1N-TC4/TC2.
Port 2
RS-232C
RS-422A/485
RS-232C
RS-232C
RS-422A/485
RS-232C
RS-422A/485
RS-232C
RS-232C
Series)
3UC
EJ1N-TC4/TC2
PV
Manipulated variable
Status
SP
Alarm value 1
Alarm value 2