PCI Express Boards Pin Assignments
Board Side Pin Assignments-Female SCSI VHDCI68
RS-232
Pin Signal Pin Signal Pin Signal Pin Signal Pin Signal Pin Signal
1 RxD6 13 DCD4 25 TxD2 37 RI7 49 RI5 61 TxD1
3 RI6 15 RI4 27 TxD0 39 DCD7 51 RxD5 63 DTR1
4 RTS6 16 CTS4 28 DSR0 40 DTR7 52 RxD3 64 DCD1
5 DCD6 17 RxD4 29 DTR0 41 DSR7 53 CTS3 65 RTS1
6 DTR6 18 RxD2 30 DCD0 42 TxD7 54 RI3 66 RI1
7 DSR6 19 CTS2 31 RTS0 43 GND 55 RTS3 67 CTS1
9 GND 21 RTS2 33 CTS0 45 DSR5 57 DTR3
10 TxD4 22 DCD2 34 RxD0 46 DTR5 58 DSR3
11 DSR4 23 DTR2 35 RxD7 47 DCD5 59 TxD3
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)
10 RxD4+(B) 27 RxD0+(B) 44 RxD5+(B) 61 RxD1+(B)
12 RxD4-(A) 29 RxD0-(A) 46 RxD5-(A) 63 RxD1-(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)