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StarTech 4-port PCI Express RS232 Serial Adapter Card - PCIe to Serial DB9 RS-232 Controller Card - 16950 UART - Windows/Linux (pex4s953)

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SKU:
18060405
MPN:
pex4s953
Availability:
Usually ships the same or next business day. In stock at our PA warehouse.
Shipping:
Calculated at Checkout
Stock Update:
08/20/2026 06:23:24 PM PST
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$117.91

Bulk discount rates

Below are the available bulk discount rates for each individual item when you purchase a certain amount

Buy 2 and pay only $111.11 each 111.11
Buy 3 or above and pay only $108.62 each 108.62
Stock Update:
08/20/2026 06:23:24 PM PST
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Description



This item is brand-new, factory sealed.

This PCI Express RS232 serial adapter card lets you add four RS232 (DB9) serial ports to your computer through a PCI Express (PCIe) slot, as if they were native serial ports. The 4 port PCIe serial card enables you to interact with serial devices, such as card readers, printers, PIN pads, and modems, at speeds of up to 921.6Kbps. Maximum Compatibility

With broad OS support, including for Windows and Linux, this multiport PCI E serial card is easy to integrate into mixed environments. The card comes pre-configured with a full-sized bracket, and includes an optional low-profile bracket, so installation is easy regardless of the case form factor. This expansion card is a direct replacement for PEX4S952.

Experience Optimal Technology

This PCIe to serial adapter supports the following features:

  • Industry standard 16950 UART compatible
  • Supports max baud rate of up-to 921.6Kbps
  • Provides 5/12V power output on Pin 9 when external power is connected
  • 256-byte depth FIFO cache per transmitter and receiver
  • Supports 9, 8, 7, 6, 5 data bits (one per port)
  • Asix AX99100 chipset
  • Base PCI Express 1.1 compliant
The Choice of IT Pros Since 1985

StarTech.com conducts thorough compatibility and performance testing on all our products to ensure we are meeting or exceeding industry standards and providing high-quality products to IT Professionals. Our local StarTech.com Technical Advisors have broad product expertise and work directly with our StarTech.com Engineers to provide support for our customers both pre and post-sales.

PEX4S953 is backed by a StarTech.com lifetime warranty and free lifetime technical support.



Package Contents:
  • 4 Port Full Profile Serial Card
  • 1 x Low Profile Bracket
  • 1 x Break-out Cable
  • 1 x Quick Start Guide
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Warranty Information

All Items are Brand New, Factory Sealed and come with a standard warranty. [Read our policies]
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StarTech 4-port PCI Express RS232 Serial Adapter Card - PCIe to Serial DB9 RS-232 Controller Card - 16950 UART - Windows/Linux (pex4s953)
$117.91