Miscellaneous Electronics
StarTech.com 4-Port Serial PCIe Card, Quad-Port PCI Express to RS232/RS422/RS485 DB9 Serial Card, Standard/Low-Profile Brackets, 16C1050 UART, ESD Protection, Windows/Linux (PS74ADF-SERIAL-CARD)
4-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-4-port-serial-pcie-card-oid29034113216.html