Startech
StarTech 2-port PCI Express RS232 Serial Adapter Card - PCIe Serial DB9 Controller Card 16950 UART - Low Profile - Windows and Linux (229986)
- SKU:
- 18060401
- MPN:
- 229986
- Availability:
- Usually ships the same or next business day. In stock at our CA, IL, PA warehouses.
- Shipping:
- Calculated at Checkout
- Stock Update:
- 12/13/2025 07:22:29 AM PST
Bulk discount rates
Below are the available bulk discount rates for each individual item when you purchase a certain amount
| Buy 2 - 3 | and pay only $53.58 each 53.58 |
| Buy 4 - 5 | and pay only $51.84 each 51.84 |
| Buy 6 or above | and pay only $50.70 each 50.7 |
- Stock Update:
- 12/13/2025 07:22:29 AM PST
Description
This item is brand-new, factory sealed.
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.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
128-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. HARDWARE
Bus Type
PCI Express
Card Type
Low Profile (SP bracket incl.)
Chipset ID
Asix AX99100
Interface
Serial
Port Style
Integrated on Card
Ports
2
PERFORMANCE
Data Bits
5, 6, 7, 8, 9
FIFO
256 Bytes
Flow Control
None, Xon/Xoff, RTS/CTS
Max Baud Rate
921.6 Kbps
Parity
None, Odd, Even, Space, Mark
Serial Protocol
RS-232
Stop Bits
1, 1.5, 2
CONNECTOR(S)
Connector Type(s)
1 - PCI Express x1 Male
External Ports
2 - DB-9 (9 pin, D-Sub) Male
Internal Ports
1 - LP4 (4 pin Large Drive Power) Male Input
SOFTWARE
Microsoft WHQL Certified
Yes
OS Compatibility
Windows 7, 8, 8.1, 10
Windows Server 2003, 2008 R2, 2012, 2012 R2, 2016
Linux 2.4.x to 2.6.x LTS Versions only
SPECIAL NOTES / REQUIREMENTS
Note
Selectable power output on pin 9 of the serial port
ENVIRONMENTAL
Humidity
5 to 85% RH
Operating Temperature
-10oC to 80oC (14oF to 176oF)
Storage Temperature
-20oC to 100oC (-4oF to 212oF)
WHATS IN THE BOX
Included in Package
1 - PCIe Serial Card
1 - Full-Profile Bracket
1 - User Manual
Item Dimension ( L inchxW inchxH inch)
7 x 6 x 2Weight
1 lbWarranty Information
Lifetime Warrant
Package Contents:
- 2-Port RS232 Serial Adapter Card with 16950 UART
- 1 x Full-Profile Bracket
- 1 x User Manual
Features
Package Contents:
Yes
Yes
Taiwan
- 2-Port RS232 Serial Adapter Card with 16950 UART
- 1 x Full-Profile Bracket
- 1 x User Manual
TAA Compliant:
Yes
Environmentally Friendly:
Yes
Environmental Compliance:
Restriction of Hazardous Substances (RoHS)
Registration, Evaluation, Authorization and Restriction of Chemicals (REACH)
Waste Electrical and Electronic Equipment Directive (WEEE)
Country of Origin:
Taiwan
Specs
| Physical Characteristics | |
| Form Factor | Plug-in Card |
| Weight (Approximate) | 3.35 oz |
| Card Height | Low-profile |
| Product Color | Green |
| Height | 3.1" |
| Color Family | Green |
| Width | 0.9" |
| Depth | 4.1" |
| Warranty | |
| Limited Warranty | Lifetime |
| Interfaces/Ports | |
| Number of Serial Ports (External) | 2 |
| General Information | |
| Brand Name | StarTech.com |
| Manufacturer Website Address | http://www.startech.com |
| Marketing Information | 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. More from the Manufacturer More from the Manufacturer |
| Product Type | Serial Adapter |
| Product Name | 2-Port RS232 Serial Adapter Card with 16950 UART |
| Manufacturer | StarTech.com |
| Manufacturer Part Number | PEX2S953LP |
| Packaged Quantity | 1 |
| Technical Information | |
| Host Interface | PCI Express x1 |
| UART Type | 16950 |
| Platform Supported |
|
Warranty Information
All Items are Brand New, Factory Sealed and come with a standard warranty. [Read our policies]
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StarTech 2-port PCI Express RS232 Serial Adapter Card - PCIe Serial DB9 Controller Card 16950 UART - Low Profile - Windows and Linux (229986)
$54.59