Omron EJ1N-TC4

10 Modular Temperature Controller EJ1
Building Systems Communicating 1:N with PLCs Using Programless
Communications
• Up to eight HFUs can be connected to one port on a PLC.
• To connect more than one HFU, specific PLC and EJ1 models must be used. Refer to Connecting EJ1 Controllers 1:N to a PLC on page 13.
V1.1
SW2
SW1
ERROR
OCC
SD/RD
READY
G3ZA
SW2
SW1
ERROR
OCC
SD/RD
READY
SW2
SW1
ERROR
OCC
SD/RD
READY
G3ZAG3ZA
Up to eight HFUs can be connected.
PC
EJ1N-HFU
PLC
EJ1N-TC4
or
EJ1N-TC2
EJ1C-EDU
Port B
Port B is used for distributed placement.
Port A (connector): USB connection can be made with the
E58-CIFQ1 (sold separately).
COM1
COM2
COM3
PWR
RUN
ERR
ALM
SW1
ON
SW2
21345678
EJ1-TC4
0
1
2
3
4
5
6
7
8
9
A
B
C
D
E
F
COM1
COM2
COM3
PWR
RUN
ERR
ALM
SW1
ON
SW2
21345678
EJ1-TC4
0
1
2
3
4
5
6
7
8
9
A
B
C
D
E
F
COM1
COM2
COM3
PWR
RUN
ERR
ALM
SW1
ON
SW2
21345678
EJ1-TC4
0
1
2
3
4
5
6
7
8
9
A
B
C
D
E
F
COM1
COM2
COM3
PWR
RUN
ERR
ALM
SW1
ON
SW2
21345678
EJ1-HFU
0
1
2
3
4
5
6
7
8
9
A
B
C
D
E
F
CX-Thermo for setting
Port C
SYSMAC (OMRON PLC) RS-485
MELSEC (Mitsubishi Electric PLC) RS-422
G3ZA
connection
port
G3ZA
connection
port
G3ZA
connection
port
G3ZA
connection
port
G3ZA
connection
port
G3ZA
connection
port
SW2
SW1
ERROR
OCC
SD/RD
READY
G3ZA
SW2
SW1
ERROR
OCC
SD/RD
READY
SW2
SW1
ERROR
OCC
SD/RD
READY
G3ZAG3ZA
EJ1N-HFU
EJ1N-TC4
or
EJ1N-TC2
EJ1C-EDU
COM1
COM2
COM3
PWR
RUN
ERR
ALM
SW1
ON
SW2
21345678
EJ1-TC4
0
1
2
3
4
5
6
7
8
9
A
B
C
D
E
F
COM1
COM2
COM3
PWR
RUN
ERR
ALM
SW1
ON
SW2
21345678
EJ1-TC4
0
1
2
3
4
5
6
7
8
9
A
B
C
D
E
F
COM1
COM2
COM3
PWR
RUN
ERR
ALM
SW1
ON
SW2
21345678
EJ1-TC4
0
1
2
3
4
5
6
7
8
9
A
B
C
D
E
F
COM1
COM2
COM3
PWR
RUN
ERR
ALM
SW1
ON
SW2
21345678
EJ1-HFU
0
1
2
3
4
5
6
7
8
9
A
B
C
D
E
F
Port C
Note: Set the EJ1N-TC to a communications unit number that is not bein
g
used by the EJ1N-HFU.