Omron NX1P2 series User Manual page 201

 Wiring Example: 1:1 Connections
a) Two-wire Connections
RS-422A/485 Option Board
Pin Signal
3 SDA -
4 SDB +
1 RDA -
2 RDB +
5 SHLD
b) Four-wire Connections
RS-422A/485 Option Board
Pin Signal
3 SDA-
4 SDB+
1 RDA-
2 RDB+
5 SHLD
NX-series NX1P2 CPU Unit Hardware User's Manual (W578)
Remote device
Signal
A(–)
B(+)
FG
Ground the shield at one end
Shield
when using NX1W-CIF12.
Remote device
Signal
RDA
RDB
SDA
SDB
FG
Shield Ground the shield at one end
when using NX1W-CIF12.
5 Installation and Wiring
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