4-port RS-232/422/485 low-profile PCIe x1 serial board w/ DB9M cable
4-port RS-232/422/485 low-profile PCIe x1 serial board w/ optical isolation
4-port RS-232/422/485 PCIe x1 serial board w/ optical isolation & DB25M cable
4-port RS-232/422/485 PCIe x1 serial board w/ optical isolation & DB9M cable