This high performance RS-422/485 multiport serial PCI card suits a broad range of environments, and is a perfect addition for connecting two-wire (with Auto Transceiver Turn Around feature, ATTATM) and four-wire configured serial devices to a host computer. Compliant with PCI 2.2 standard specifications, PCI2S485 offers a high performance 16C950 compliant UART offering maximum data transfer rates of up to 921kbps, and offers broad compatibility with any available 3.3V or 5V PCI or PCI-X slot.