DB-9 Pinout Asynchronous EIA-422

The wiring diagram for an EIA-422 DB-9 connector is shown in Table 1.

Table 1:  EIA-422 DB-9 connector

DB-9	Direction	Signal
2		RTS+
3		RTS-
4		CTS+
5		CTS-
6		RxD+
7		RxD-
8		TxD+
9		TxD-
Shell		GND

NOTES:

• For information regarding the EIA-232/EIA-422/EIA485 specifications, click here.