Moxa Technologies CP-168U - Manual (Page 76)

5-2 Smartio CP-168U User’s Manual
DB-9/M Pin Assignment (Opt8-M9, Opt8D)
DB-25/M Pin Assignment (Opt8B/C)
MODE
PIN
RS232
1 DCD
2 RxD
3 TxD
4 DTR
5 GND
6 DSR
7 RTS
8 CTS
MODE
PIN
RS-232
2 TxD
3 RxD
4 RTS
5 CTS
6 DSR
7 GND
8 DCD
20 DTR