Omron EJ1N-TC4 Operation Manual page 9

■ Multiple Units with an EJ1N-HFU
Building Systems Communicating 1:1 with a PLC Using Programless
Communications
• The 2 auxiliary outputs (transistor outputs) provided on the End Unit can be used.
• In addition to the 2 auxiliary alarm outputs provided on the End Unit, the 4 event inputs/4 auxiliary outputs (transistor outputs) of the HFU can
also be used.
• G3ZA outputs can be used.
• Distributed placement is possible by using multiple EJ1C-EDU End Units
RS-232C
EJ1N-TC4
or
EJ1N-HFU EJ1N-TC2
PWR COM1 PWR COM1 PWR COM1 PWR
RUN EJ1-HFU COM2 RUN EJ1-TC4 COM2 RUN EJ1-TC4 COM2 RUN
ERR COM3 ERR COM3 ERR COM3 ERR
ALM ALM ALM ALM
SW1 SW1 SW1 SW1
ON ON ON
SW2 SW2 SW2 SW2
Port C
G3ZA
G3ZA
connection
connecti-
port on port
READY READY
SD/RD SD/RD
SW1 SW1
OCC OCC
SW2 SW2
ERROR ERROR
G3ZA G3ZA
PLC
EJ1C-EDU
COM1
EJ1-TC4 COM2
COM3
Port A (connector): USB connection can be made with the
E58-CIFQ1 (sold separately).
ON
Port B
Port B is used for distributed placement.
G3ZA
connection
port
READY
SD/RD
SW1
OCC
SW2
ERROR
G3ZA
CX-Thermo for setting
PC
Modular Temperature Controller
EJ1
9