Port 1: RS-232 or RS-422/485
Port 2: RS-422/485
16C550 UARTs with 16-byte FIFO
Speeds from 50kbps to 115kbps
Distance up to 1640 ft/1.2 km
I/O address and interrupt selectable
500 VDC Isolation
Automatic RS-485 data flow control
Data flow indicator for troubleshooting
Surge protection on Tx/Rx lines
Power Requirement: +5V at 400mA (typ.), 950mA (max.)

PCM-3610: PC/104 Isolated RS-232/422/485 Module