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6.Pin Assignments
NPort 6110 supports three serial interfaces: RS-232, RS-422, and 2-wire RS-485.
In this chapter, we give the DB9 Male pinouts for each of these three interfaces.
DB9 Male Pinouts
Pin No. RS-232 RS-422 RS-485
1 DCD TxD-(A) Data-(A)
2 RxD TxD+(B) Data+(B)
3 TxD RxD+(B) ---
4 DTR RxD-(A) ---
5 GND GND GND
6 DSR RTS-(A) ---
7 RTS RTS+(B) ---
8 CTS CTS+(B) ---
9 --- CTS-(A) ---
1 2 3 4 5
6 7 8 9