Brainboxes PX-346 Internal Serial interface cards/adapter

4 x RS422/485 DB9, 921.6kBaud, PCI Express PCI Express Card providing four RS422/485 serial ports. Data transfer rates up to 921,600 baud rates and the 128 byte deep transmit and 128 byte receive FIFOS, coupled with 1Mbit/s line drivers deliver uncompromising performance on your PC. Drivers for Windows 32 bit and 64 bit Operating Systems including Windows 2000, XP, Server 2003, Vista, Server 2008 and Windows 7.