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Startech 2 Port Low Profile Native RS232 PCI Express Serial Card with 16950 UART PEX2S952LP


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Add 2 RS-232 serial ports to your standard or small form factor computer through a PCI Express expansion slot

  • 128-byte deep FIFO per transmitter and receiver

  • Automated in-band software flow control using programmable Xon/Xoff in both directions

  • Automated out-of-band hardware flow control using Tx/Rx/RTS/CTS/DSR/DTR/DCD/RI/GND

The PEX2S952LP low profile/half-height PCI Express Serial Card turns a PCI Express slot into two RS232 (DB9) serial connections.

The card is constructed using a native single chip design that lets you harness the full capability offered by PCI Express (PCIe), while reducing the load applied to the CPU by as much as 48% over conventional bridge chip serial cards.

The PCI Express RS232 Serial Adapter Card is compatible with a broad range of operating systems including Windows® 7/ Server 2008 R2 / Vista/ XP/ 2000, Linux Kernel 2.6.11 and up. The card comes pre-configured with a low profile bracket, but also includes an optional full profile bracket that lets you add two serial ports to virtually any computer (regardless of the case form factor).

Backed by a Lifetime warranty and free lifetime technical support.

The Advantage
  • Data transfer rates of up to 460 Kbps for peak serial device performance
  • Native single-Chip, single lane PCI Express offers increased performance, for up to 48% less cpu load
  • Pre-configured for Low profile systems but includes a full profile bracket for versatility

  • Bank teller workstations in either full profile or low profile versions to control their serial devices such as cash drawers, card readers / card swipes, printers, keypads / pinpads, pen pads
  • POS retail applications in grocery stores, and any other retail store to control keyboards, cash drawers, receipt printers, card readers / card swipes, scales, and elevated displays on poles
  • Self service automated machines and kiosks to control serial devices such as scales, touchscreens, magnetic card readers, bar code scanners, receipt printers, label printers
  • Standard ATM automated teller machines to control keypads, receipt printer, card readers / card swipes, touchscreen LCD's, camera control, etc.
  • Used to control multiple surveillance / security cameras in a parking structure, office building, etc.

Warranty Information




Bus Type

PCI Express

Card Type

Low Profile (SP bracket incl.)

Chipset ID

PLX/Oxford - OXPCIe952



Port Style

Integrated on Card





128 Bytes

Max Baud Rate

460.8 Kbps


87,600 Hours

Serial Protocol



Connector Type(s)

1 - PCI Express x1 Male

External Ports

2 - DB-9 (9 pin, D-Sub) Male

Internal Ports

1 - LP4 (4 pin, Molex Large Drive Power) Male


Microsoft WHQL Certified


OS Compatibility

Windows® CE 6.0 / 5.0, 95, 98SE, 2000, XP, XP Embedded, Vista, 7, 8, 8.1, 10

Windows Server® 2003, 2008 R2, 2012, 2012 R2, 2016

Linux 2.4.x to 4.4.x LTS Versions only



5~85% RH

Operating Temperature

-10°C to 80°C (14°F to 176°F)

Storage Temperature

-20°C to 100°C (-4°F to 212°F)

Physical Characteristics

Product Height

0.8 in [20 mm]

Product Length

3.5 in [90 mm]

Product Weight

2 oz [58 g]

Product Width

3.1 in [80 mm]

Packaging Information

Shipping (Package) Weight

0.5 lb [0.2 kg]

What's in the Box

Included in Package

1 - Low Profile Serial Card

1 - Ribbon Cable w/ DB9 port

1 - Full Profile Bracket

1 - Low Profile Bracket

1 - Driver CD

1 - Instruction Manual

2 Port Low Profile Native RS232 PCI Express Serial Card with 16950 UART

Brand Name:
Form Factor: Plug-in Card
Host Interface: PCI Express
Number of Serial Ports (External): 2
Product Type: Serial Adapter


Brand Name:

Form Factor:

Plug-in Card

Host Interface:

PCI Express

Number of Serial Ports (External):


Product Type:

Serial Adapter
General Information

Brand Name:

Manufacturer Part Number:


Manufacturer Website Address:


Product Model:


Product Name:

2 Port Low Profile PCI Express Serial Card - 16950

Product Type:

Serial Adapter

Number of Serial Ports (External):


Environmental Certification:


Environmentally Friendly:


Package Contents:
  • 2 Port Low Profile PCI Express Serial Card - 16950
  • Full-profile Bracket
Physical Characteristics

Card Height:


Form Factor:

Plug-in Card
Technical Information

Host Interface:

PCI Express

Platform Supported:


UART Type:


Limited Warranty:

2 Year
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SKU/Item No538049
Vendor Part NoPEX2S952LP
UPC/EAN Number65030837170
Our Stock **     (more info below)
QR 2D barcode QR 2D PEX2S952LP
Product linkNo link
Manufacturer's linkStartech
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Stock Information
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 Supplier's Qty in StockAvailability and ETAUpdated
Supplier one
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