The PEX4S232485 4 Port PCI Express PCIe Serial Combo Card - 2 x RS232 2 x RS422 / RS485 lets you add two RS232, and two RS422/485 serial ports to your PC through a PCI-Express expansion slot.
This PCI express serial card is a single card solution that is compatible with nearly any serial communication protocol, supporting RS-232, RS-422, RS-485 2-wire or RS-485 4-wire operating modes.
A flexible solution for adding serial ports to full-sized, or small form factor systems, the 4-port serial card includes both low and full profile brackets while the included breakout cable helps to avoid cluttered connections.
Port 1 and 2 are for RS232. Port 3 and 4 can be used for 422 Mode, 485 Mode (4 Wire), or 485 Mode (2 Wire). Port 3 and Port 4 are enabled through the PEX4S232485's jumper settings.
