Miscellaneous Electronics
StarTech.com 2-Port Serial PCIe Card, Dual-Port PCI Express to RS232/RS422/RS485 DB9 Serial Card, Standard/Low-Profile Brackets, 16C1050 UART, ESD Protection, Windows/Linux (2S232422485-PC-CARD)
2-PORT PCIE SERIAL CARD: On-board DIP switches allow each DB9 serial port to operate in its own independent mode, enabling the connection of RS-232, RS-422, and RS-485 devices; LED indicators to monitor data transmit/receive status CONFIGURABLE...
https://www.bizrate.co.uk/miscellaneouselectronics/startech-com-2-port-serial-pcie-card-oid28758835912.html