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PCI Express Board User’s Manual Pin Assignments
5-3
RS-422 and 4-wire RS-485
Pin Signal Pin Signal Pin Signal Pin Signal
1
TxD6+(B)
18
TxD2+(B)
35
TxD7+(B)
52
TxD3+(B)
5
TxD6-(A)
22
TxD2-(A)
39
TxD7-(A)
56
TxD3-(A)
6
RxD6-(A)
23
RxD2-(A)
40
RxD7-(A)
57
RxD3-(A)
8
RxD6+(B)
25
RxD2+(B)
42
RxD7+(B)
59
RxD3+(B)
9
GND
26
GND
43
GND
60
GND
10
RxD4+(B)
27
RxD0+(B)
44
RxD5+(B)
61
RxD1+(B)
12
RxD4-(A)
29
RxD0-(A)
46
RxD5-(A)
63
RxD1-(A)
13
TxD4-(A)
30
TxD0-(A)
47
TxD5-(A)
64
TxD1-(A)
17
TxD4+(B)
34
TxD0+(B)
51
TxD5+(B)
68
TxD1+(B)
2-wire RS-485
Pin Signal Pin Signal Pin Signal Pin Signal
6
D6-(A)
23
D2-(A)
40
D7-(A)
57
D3-(A)
8
D6+(B)
25
D2+(B)
42
D7+(B)
59
D3+(B)
9
GND
26
GND
43
GND
60
GND
10
D4+(B)
27
D0+(B)
44
D5+(B)
61
D1+(B)
12
D4-(A)
29
D0-(A)
46
D5-(A)
63
D1-(A)
Device Side Pin Assignments
Male DB9 (OPT8D+/OPT8-M9+)
15
69
Pin RS-232
RS-422 /
4-wire RS-485
2-wire RS-485
1
DCD TxD-(A) ---
2
RxD TxD+(B) ---
3
TxD RxD+(B) Data+(B)
4
DTR RxD-(A) Data-(A)
5
GND GND GND
6
DSR --- ---
7
RTS --- ---
8
CTS --- ---
9
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