Tx+, Tx-, Rx+, Rx-, RTS+, RTS-, CTS+, CTS-, GND

4 Port UPCI Board, w/ DB25M Cable, RS-422/485, w/ Isolation

2 Port UPCI Board, w/DB9M Cable, RS-232/422/485, Low Profile

2 Port UPCI Board, w/DB9M Cable, RS-232/422/485, w/Isolation, Low Profile

2 Port UPCI Board, RS-232/422/485, w/Isolation, Low Profile, Wide Temperature

2 Port UPCI Board, RS-232/422/485, Low Profile, Wide Temperature

2 Port UPCI Board, w/ DB9M Cable, RS-422/485, Low Profile