StarTech.com 2 Port PCI RS422/485 Serial Adapter Card with 161050 UART Add two RS422/485 serial ports through a standard or low profile PCI expansion slot 2 Port PCI RS422/485 Serial Adapter Card with 161050 UART PCI serial card supports maximum data transmission rate of 128Kbps A simple jumper change allows you to select either RS422 or RS485 serial interface formats specific to your application 16C1050 UART with 256-byte Deep FIFO