PCI Express Boards
Pin Assignments
7-9
CP-132EL/CP-132EL-I
Board Side Pin Assignments—Female DB25
RS-422 & 4-wire RS-485
2-wire RS-485
Pin
Signal
Pin
Signal
1
–
14
–
2
TxD1-(A)
15
RxD1-(A)
3
GND1
16
–
4
–
17
–
5
TxD1+(B)
18
RxD1+(B)
6
–
19
–
7
–
20
–
8
–
21
TxD0-(A)
9
RxD0-(A)
22
GND0
10
–
23
–
11
–
24
TxD0+(B)
12
RxD0+(B)
25
–
13
–
Pin
Signal
Pin
Signal
1
–
14
–
2
–
15
Data1-(A)
3
GND1
16
–
4
–
17
–
5
–
18
Data1+(B)
6
–
19
–
7
–
20
–
8
–
21
–
9
Data0-(A)
22
GND0
10
–
23
–
11
–
24
–
12
Data0+(B)
25
–
13
–
Device Side Pin Assignments
Male DB9 (CBL-M25M9x2-50)
Pin
RS-422/RS-485-4W
RS-485-2W
1
TxD-(A)
–
2
TxD+(B)
–
3
RxD+(B)
Data+(B)
4
RxD-(A)
Data-(A)
5
GND
GND
6
–
–
7
–
–
8
–
–
9
–
–
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