Moxa Technologies CP-118EL - Manual (Page 62)

PCI Express Board User’s Manual Pin Assignments
5-7
Female DB25 (OPT8A+/S+)
13 1
25 14
Pin RS-232
2 RxD
3 TxD
4 CTS
5 RTS
6 DTR
7 GND
8 DCD
20 DSR
Female DB25 (OPT8F+/Z+)
Pin RS-422
2 RxD+(B)
3 TxD+(B)
7 GND
14 RxD-(A)
16 TxD-(A)
Female DB25 (OPT8K+/I+)
Pin
RS-422 /
4-wire RS-485
2-wire RS-485
2 RxD+(B) Data+(B)
3 TxD+(B) ---
7 GND GND
14 RxD-(A) Data-(A)
16 TxD-(A) ---