StarTech.com 1-port PCI Express RS232 Serial Adapter Card, PCIe RS232 Serial Host Controller Card, PCIe to Serial DB9 COM Port, 16950 UART, Low Profile Expansion Card, Windows/macOS/Linux - Full/Low-Profile (PEX1S953LP) - Serial adapter - PCIe low profile

This RS232 Serial Adapter Card lets you add an RS232 DB9 serial port to your computer through a PCI Express (PCIe) slot. It enables you to interact with serial devices such as card readers, printers, PIN pads, and modems, at speeds of up-to 921.4Kbps.
With broad OS support, including for Windows and Linux, this PCI Express card is easy to integrate into mixed environments. The card comes pre-configured with a low-profile bracket, and includes an optional full-profile bracket, so installation is easy regardless of the case form factor.
This PCIe to serial adapter supports the following features: Compatible with industry standard 16950 UART; Supports max baud rate of up-to 921.4Kbps; Provides 5/12V power output on Pin 9 when external power is connected; 128-byte depth FIFO per transmitter and receiver; Supports 9, 8, 7, 6, 5 data bits; Asix AX99100 chipset; PCI Express 1.1 compliant.

This RS232 Serial Adapter Card lets you add an RS232 DB9 serial port to your computer through a PCI Express (PCIe) slot. It enables you to interact with serial devices such as card readers, printers, PIN pads, and modems, at speeds of up-to 921.4Kbps.