
PCI Express Board User’s Manual Pin Assignments
5-15
Device Side Pin Assignments
Male DB9 (CBL-M44M9x4-50)
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 --- ---
Male DB25 (CBL-M44M25x4-50)
1
14
13
25
Pin RS-232
RS-422 &
4-wire RS-485
2-wire RS-485
2
TxD RxD+(B) Data+(B)
3
RxD TxD+(B) ---
4
RTS --- ---
5
CTS --- ---
6
DSR --- ---
7
GND GND GND
8
DCD TxD-(A) ---
20
DTR RxD-(A) Data-(A)
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