The 2-door PCI serial adapter tab (RS-422/RS-485) PCI2S4851050 with 161050 UART allows you to add two serial doors DB9 RS-422/RS-485 using a single PCI expansion slot. The PCI serial card offers a high-performance 16C1050 URT and supports 2 and 4 RS-485 wires. The card presents itself with an efficient single chip design and provides for a FIFO buffer in transmission/reception from 256 bytes, which, operating simultaneously, provide high -speed serial communication, reducing the overall load on the system CPU. Thanks to the brackets included, with standard profile and low/half height, this PCI serial expansion card is suitable for a wide range of form factors and represents the ideal additional solution for the connection of devices Serial RS-422/485 to a host computer. For greater versatility, the RS-422/RS-485 adapter is able to support PCI/PCI-X slots at 3.3 or 5 V. With Vita Startech.com Life Guarantee and free-life technical support