2 Port RS232 Serial Adapter Card with 16950 UART... 2 Port RS232 Serial Adapter Card with 16950 UART - 921.4Kbps
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Key features
  • 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
  • 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
  • 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
  • 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
  • STARTECH.COM ADVANTAGE: IT professionals choice for over 30 years; PCIe RS232 Serial expansion card is backed for life by, incl. free 24/5 North America based multi-lingual tech support
Product overview
  • Wired / Wireless: Wired
  • Protocol: RS-232
  • Type: Serial adapter
Product codes

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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.

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.



Product Description 2-port PCI Express RS232 Serial Adapter Card, PCIe RS232 Serial Host Controller Card, PCIe to Serial DB9 COM Ports, 16950 UART, Low Profile Expansion Card, Windows/macOS/Linux - Full/Low-Profile (PEX2S953LP) - serial adapter - PCIe - RS-232 x 2
Device Type Serial adapter
Form Factor Plug-in card - low profile
Interface (Bus) Type PCI Express x1
PCI Specification Revision PCIe 1.1
Ports RS-232 x 2
Dimensions (WxDxH) 6.7 cm x 9.8 cm x 1.8 cm
Weight 55.6 g
Data Link Protocol RS-232
Data Transfer Rate 921.6 Kbps
Processor ASIX AX99100
System Requirements Microsoft Windows Server 2003, Microsoft Windows Server 2008 R2, Microsoft Windows Server 2012, Microsoft Windows Server 2012 R2, Microsoft Windows Server 2016, Linux 2.4 - 2.6.x
Manufacturer Warranty Limited lifetime warranty



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Trusted by customers for over two decades 2 Port RS232 Serial Adapter Card with 16950 UART - 921.4Kbps