NPort IA5150A/IA5250A Series Pinouts and Cable Wiring
Port Pinout Diagrams
Ethernet Port Pinouts
Pin Signal
1 Tx+
2 Tx-
3 Rx+
6 Rx-
RS-232/422/485 (male DB9) Pinouts
Pin RS-232 RS-422, 4-wire
RS-485
2-wire RS-485
1 DCD TxD-(A) –
2 RxD TxD+(B) –
3 TxD RxD+(B) Data+(B)
4 DTR RxD-(A) Data-(A)
5 GND GND GND
6 DSR – –
8 CTS – –
9 – – –
Note: The NPort IA5150A Series’s DB9 ports only support RS-232 signals.
RS-422/485 (5-contact terminal block) Pinouts for the NPort
IA5150A Series
Pin 2-wire RS-485 RS-422, 4-wire RS-485
1 – TxD+(B)
3 Data+(B) RxD+(B)
4 Data-(A) RxD-(A)
5 GND GND
Power Input and Relay Output Pinouts
PWR1 PWR2 RELAY
Shielded Ground DC Power Input DC Power Input Normal Open/Close, Relay output