Moxa Technologies PCI Express Board User Manual page 80

PCI Express Board User's Manual
Male DB25 (OPT8B+/C+)
Pin
2
3
4
5
6
7
8
20
Female DB25 (OPT8A+/S+)
Pin
2
3
4
5
6
7
8
20
1
14
RS-422 /
RS-232
4-wire RS-485
TxD RxD+(B)
RxD TxD+(B)
RTS ---
CTS ---
DSR ---
GND GND
DCD TxD-(A)
DTR RxD-(A)
13
25
RS-422 /
RS-232
4-wire RS-485
RxD TxD+(B)
TxD RxD+(B)
CTS ---
RTS ---
DTR RxD-(A)
GND GND
DCD TxD-(A)
DSR ---
13
25
2-wire RS-485
Data+(B)
GND
Data-(A)
1
14
2-wire RS-485
Data+(B)
Data-(A)
GND
5-5
Pin Assignments
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