PCI Express Boards Pin Assignments
CP-114EL/CP-114EL-I
Board Side Pin Assignments—Female DB44
RS-232
Pin Signal Pin Signal Pin Signal Pin Signal
1 TxD3 13 TxD0 25 DTR1 37 GND
2 RxD3 14 RxD0 26 DSR1 38 –
3 RTS3 15 RTS0 27 – 39 DCD1
4 – 16 CTS3 28 CTS0 40 –
5 TxD2 17 DTR3 29 DTR0 41 GND
7 RTS2 19 – 31 DCD3 43 –
8 – 20 CTS2 32 – 44 GND
9 TxD1 21 DTR2 33 GND
10 RxD1 22 DSR2 34 –
11 RTS1 23 – 35 DCD2
RS-422 & 4-wire RS-485
Pin Signal Pin Signal Pin Signal Pin Signal
1 RxD3(+) 13 RxD0(+) 25 RxD1(-) 37 GND
2 TxD3(+) 14 TxD0(+) 26 – 38 –
3 – 15 – 27 – 39 TxD1(-)
4 – 16 – 28 – 40 –
5 RxD2(+) 17 RxD3(-) 29 RxD0(-) 41 GND
6 TxD2(+) 18 – 30 – 42 TxD0(-)
7 – 19 – 31 TxD3(-) 43 –
8 – 20 – 32 – 44 GND
10 TxD1(+) 22 – 34 –
11 – 23 – 35 TxD2(-)
12 – 24 – 36 –