Control and communicate with two serial devices even with mixed RS-232 & 485 protocols. The PCI2S232485I PCI Serial Adapter Card lets you turn a PCI or PCI-X slot into 2 serial ports capable of communicating in RS-232, RS-422, or RS-485 operating modes, at baud rates up to 921.6 Kbps.
This universal serial adapter not only features two DB9 serial ports that can be independently configured, but also supports nearly any configuration including: RS-422, RS-485 2-wire, RS-485 4-wire, or RS-232 modes. Designed for reliability, this 2-port PCI Serial card also features built-in ESD (Electro-Static Discharge) protection to ensure that your connected serial devices remain protected.
For added versatility, the PCI RS232 card is compatible with a broad range of operating systems, including Windows, Windows Server, Windows Embedded and Linux platforms, for simple installation into mixed environments.
StarTech.com 2 Port RS232/422/485 PCI Serial Adapter Card w/ ESD - serial adapter