StarTech.com 2-port PCI Express RS232 Serial Adapter Card - PCIe Serial DB9 Controller Card 16950 UART - Low Profile - Windows macOS Linux - SystemsDirect.com

StarTech.com 2-port PCI Express RS232 Serial Adapter Card - PCIe Serial DB9 Controller Card 16950 UART - Low Profile - Windows macOS Linux

  • $ 63.99

We currently have 1343 in stock.
SKU: MPN: PEX2S953LP UPC:
Product Description

This RS232 Serial Adapter Card lets you add two RS232 (DB9) serial ports 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.

Maximum Compatibility

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.

Experience Optimal Technology

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
  • 256-byte depth FIFO per transmitter and receiver
  • Supports 9, 8, 7, 6, 5 data bits
  • Asix AX99100 chipset
  • PCI Express 1.1 compliant

PEX2S953LP is backed by a StarTech.com lifetime warranty and free lifetime technical support.


  • STARTECH.COM ADVANTAGE: IT professionals choice for over 30 years; PCIe RS232 Serial expansion card is backed for life by StarTech.com, incl. free 24/5 North America based multi-lingual tech support
  • VERSATILE APPLICATIONS: For standard/low profile desktop/servers w/ uses in point of sale terminals, PLCs, control/automation in factories, scientific sensors, medical equipment, scanner, oscilloscope
  • LOW PROFILE BRACKETS PRE-INSTALLED: PCIe multiport serial card comes w/ a low profile bracket preinstalled & a full profile bracket is incl for versatile install; supports Windows XP and up & Linux
  • OPTIONAL CONFIGURABLE POWER: PCI Express RS232 serial adapter card provides choice of 12v, 5v, or none through pin 9 w/up to 2A total; Each of the 2 ports are individually configurable
  • 2 PORT SERIAL CARD: Serial controller card w/16950 UART based on ASIX AX99100, allows 2x DB9 ports w/bi-directional RS232 speeds up to 921.6Kbps per port, available 256 byte FIFO buffer & 9th data bit

Have a Question before ordering?

We will gladly answer within 24 hours!

Ask a Question