Omron CJ1W-SCU32 Operation Manual page 126

3 Installation and Wiring
1:N Connections Using RS-422A/485 Ports
Serial Communications Unit
Signal
RDA
RS-422A/
RDB
485 Inter-
SDA
face
SDB
FG
Terminal block connector
Serial Communications Unit
Signal
RDA
RS-422A/
RDB
485 Inter-
SDA
face
SDB
FG
Terminal block connector
3-16
Device that supports
RS-422A/485
communications
(2-wire)
Signal
Pin
RS-422A/
485 Inter-
A(−)
1
face
2 B(+)
3
4
5
Device that supports
RS-422A/485
communications
(2-wire)
Signal
RS-422A/
485 Inter-
A(−)
face
B(+)
Pin
RS-422A
1
2
3
4
5
Shield
RS-422A
CJ-series Serial Communications Units Operation Manual for NJ-series CPU Unit(W494)
Device that supports
RS-422A/485
communications
(4-wire)
Signal
RS-422A/
SDA
485 Inter-
SDB
face
RDA
RDB
Device that supports
RS-422A/485
communications
(4-wire)
Signal
SDA RS-422A/
485 Inter-
SDB
face
RDA
RDB