Startech.com 2 Port Serial PCIe Card Dual Port PCI Express to RS232/RS422/RS485Add serial communication support to a desktop computer or Small Form Factor (SFF) system, using this 2 Port Serial PCI Express Card. The two DB9 ports can be independently configured to support RS 232, RS 422, and 2 4 wire RS 485 standards, for communication with compliant serial peripheral devices.
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Startech.com 2 Port Serial PCIe Card Dual Port PCI Express to RS232/RS422/RS485