Startech 4 Port Pci Express Pcie Serial Combo Card 2 X Rs232 2 X Rs422 / Rs485 P
More from the Manufacturer More from the Manufacturer. Ports Expandability4 x DB-9 RS-232/422/485 - Serial, Via Cable. Product TypeMultiport Serial Adapter. Form FactorPlug-in Card. Maximum Data Transfer Rate3.59 Mbit/s.