StarTech.com 1 Port CardBus PCMCIA RS422 RS485 Serial Laptop Adapter Card - 1 x 9-pin DB-9 Male RS-422/485

This high-performance CardBus RS-422/485 Card card is an ideal solution for mobile / industrial applications and offers 16C950 compliant UARTs. With support for Auto Transceiver Turn Around (ATTA), bi-directional 128-byte deep FIFO operation, and maximum data transfer rate.