StarTech.com 2-port PCI Express RS232 Serial Adapter Card - PCIe RS232 Serial Host Controller Card - PCIe to Dual Serial DB9 Card - 16950 UART - Expansion Card - Windows & Linux

StarTech.com 2-port PCI Express RS232 Serial Adapter Card - PCIe RS232 Serial Host Controller Card - PCIe to Dual Serial DB9 Card - 16950 UART - Expansion Card - Windows & Linux

Brand StarTech.com

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£46.38

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You save £7.60 (14%)

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Listed since 7 April 2026

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Description

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 / Upgraded version of our popular card PEX2S952. 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. STANDARD PROFILE & LOW PROFILE BRACKET: PCIe multiport serial card comes w/ a standard bracket pre-installed & 2x low profile brackets incl for versatile install; supports Windows XP and up & Linux. VERSATILE APPLICATIONS: For standard profile desktop/servers with uses in point of sale terminals, PLCs, control/automation in factories, scientific sensors, medical equipment, scanners, oscilloscope. STARTECH.COM ADVANTAGE: IT professionals choice for over 30 years; PCI-e RS232 Serial expansion card is backed for life by StarTech.com, incl. free 24/5 North America based multi-lingual tech support. PCI Express to Serial Adapter | 921.6Kbps | Windows® and Linux® Compatible. This multiport PCI Express RS232 serial adapter card lets you add two RS232 (DB9) serial ports to your computer through a PCI Express (PCIe) slot, as if they were native serial ports. The dual 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 2 port PCI E serial card is easy to integrate into mixed environments. The card comes pre-configured with a full-profile bracket, and includes optional low-profile brackets, so installation is easy regardless of the case form factor. This card is a direct replacement for PEX2S952 .. 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. • Low and full-profile brackets included. 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.. PEX2S953 is backed by a StarTech.com lifetime warranty and free lifetime technical support.. The StarTech.com Advantage. Ports & interfaces. Serial interface type. RS-232. Serial ports quantity. 2. Expansion card standard. PCIe 1.1. Output interface. Serial. Host interface. PCIe. Design. Mean time between failures (MTBF). 222366 h. Product colour. Green. Internal. Yes. Features. Flow Control type. No, RTS/CTS, XON/XOFF. Parity bit. Even, Mark, No, Odd, Space. Stop bits. 1, 1.5, 2. Data bits. 5, 6, 7, 8, 9. FIFO (First In, First Out). 256 B. Baud rate. 921.6 Kbit/s. Chipset. Asix AX99100. Operational conditions. Operating relative humidity (H-H). 5 - 85%. Storage temperature (T-T). -20 - 100 °C. Operating temperature (T-T). -10 - 80 °C. Technical details. Sustainability compliance. Yes. Compliance certificates. CE, RoHS. System requirements. Server operating systems supported. Windows Server 2003, Windows Server 2008 R2, Windows Server 2012, Windows Server 2012 R2, Windows Server 2016. Linux operating systems supported. Yes. Windows operating systems supported. Windows 10, Windows 10 Education, Windows 10 Education x64, Windows 10 Enterprise, Windows 10 Enterprise x64, Windows 10 Home, Windows 10 Home x64, Windows 10 IOT Core, Windows 10 Pro, Windows 10 Pro x64, Windows 10 x64, Windows 7, Windows 7 Enterprise, Windows 7 Enterprise x64, Windows 7 Home Basic, Windows 7 Home Basic x64, Windows 7 Home Premium, Windows 7 Home Premium x64, Windows 7 Professional, Windows 7 Professional x64, Windows 7 Starter, Windows 7 Starter x64, Windows 7 Ultimate, Windows 7 Ultimate x64, Windows 7 x64, Windows 8, Windows 8 Enterprise, Windows 8 Enterprise x64, Windows 8 Pro, Windows 8 Pro x64, Windows 8 x64, Windows 8.1, Windows 8.1 Enterprise, Windows 8.1 Enterprise x64, Windows 8.1 Pro, Windows 8.1 Pro x64, Windows 8.1 x64. Weight & dimensions. Weight. 56 g. Height. 15 mm. Depth. 75 mm. Width. 63 mm. Packaging data. Package weight. 136 g. Package height. 30 mm. Package depth. 142 mm. Package width. 170 mm. Quick installation guide. Yes. Quantity. 1. Logistics data. Master (outer) case height. 306 mm. Master (outer) case length. 345 mm. Master (outer) case width. 685 mm. Products per master (outer) case. 75 pc(s). Harmonized System (HS) code. 84733020. manual pdf

Full specifications

Marque StarTech.com
Référence fabricant pex2s953
PORT SERIAL CARD Serial controller card w/16950 UART based on ASIX AX99100
OPTIONAL CONFIGURABLE POWER PCI Express RS232 Serial Adapter Card provides choice of 12v
LOW PROFILE BRACKET PCIe multiport serial card comes w/ a standard bracket pre-installed & 2x low pr
VERSATILE APPLICATIONS For standard profile desktop/servers with uses in point of sale terminals
COM ADVANTAGE IT professionals choice for over 30 years
Supports The Following Features . • Industry standard 16950 UART compatible. • Supports max baud rate of up-to 9

Why choose the StarTech.com 2-port PCI Express RS232 Serial Adapter Card - PCIe RS232 Serial Host Controller Card - PCIe to Dual Serial DB9 Card - 16950 UART - Expansion Card - Windows & Linux in 2026?

Choosing the StarTech.com 2-port PCI Express RS232 Serial Adapter Card - PCIe RS232 Serial Host Controller Card - PCIe to Dual Serial DB9 Card - 16950 UART - Expansion Card - Windows & Linux means opting for the expertise of StarTech.com in the Informatique category. Its price starting from £46.38 makes it a serious option on the market. Buyers interested in this brand also look at the StarTech.com USB 2.0 to VGA Adapter, USB to VGA Monitor Converter for Windows, 1080p (no support for macOS/ChromeOS/Linux) - TAA to complete their comparison. On Compiral, all displayed prices are updated regularly and retailers are selected for their reliability and quality of customer service.

Technical analysis of the StarTech.com 2-port PCI Express RS232 Serial Adapter Card - PCIe RS232 Serial Host Controller Card - PCIe to Dual Serial DB9 Card - 16950 UART - Expansion Card - Windows & Linux

Among the main strengths of the StarTech.com 2-port PCI Express RS232 Serial Adapter Card - PCIe RS232 Serial Host Controller Card - PCIe to Dual Serial DB9 Card - 16950 UART - Expansion Card - Windows & Linux, the most notable are its competitive pricing from £46.38 and the recognition of the StarTech.com brand. Buyers who have already used this type of product in the Informatique category generally highlight the effectiveness of the core functions and ease of maintenance. It is a product that suits both first-time buyers and those replacing existing equipment, with a short learning curve and stable performance over time.

What the tech specs reveal

The StarTech.com 2-port PCI Express RS232 Serial Adapter Card - PCIe RS232 Serial Host Controller Card - PCIe to Dual Serial DB9 Card - 16950 UART - Expansion Card - Windows & Linux spec sheet details the specifications that make a difference in daily use. For a savvy buyer, this data allows objective comparison with other products in the Informatique category. StarTech.com publishes precise specifications that make comparison easier and help you make an informed purchase decision. Consult the technical specifications table on this page for full details. The StarTech.com USB 2.0 to VGA Adapter, USB to VGA Monitor Converter for Windows, 1080p (no support for macOS/ChromeOS/Linux) - TAA from the same brand may also interest you for a direct comparison.

In practice day to day

In daily use, the StarTech.com 2-port PCI Express RS232 Serial Adapter Card - PCIe RS232 Serial Host Controller Card - PCIe to Dual Serial DB9 Card - 16950 UART - Expansion Card - Windows & Linux is designed to fit easily into the regular habits of Informatique users. StarTech.com has optimised this model for regular use, with accessible features and simplified maintenance.

Market price ranges in 2026

RangeIndicative price
Entry-levelUnder 3210 £
Mid-range3210 £ to 7490 £
High-endOver 7490 £

Before buying the StarTech.com 2-port PCI Express RS232 Serial Adapter Card - PCIe RS232 Serial Host Controller Card - PCIe to Dual Serial DB9 Card - 16950 UART - Expansion Card - Windows & Linux, remember to check the total price including delivery costs. On Compiral, sorting by total price lets you immediately identify the best offer among all listed retailers. Comparing return conditions and the warranty period offered by each retailer is also a good habit before finalising your order in the Informatique category.

Frequently asked questions about StarTech.com 2-port PCI Express RS232 Serial Adapter Card - PCIe RS232 Serial Host Controller Card - PCIe to Dual Serial DB9 Card - 16950 UART - Expansion Card - Windows & Linux

Is the StarTech.com 2-port PCI Express RS232 Serial Adapter Card - PCIe RS232 Serial Host Controller Card - PCIe to Dual Serial DB9 Card - 16950 UART - Expansion Card - Windows & Linux in stock?

Stock availability for the StarTech.com 2-port PCI Express RS232 Serial Adapter Card - PCIe RS232 Serial Host Controller Card - PCIe to Dual Serial DB9 Card - 16950 UART - Expansion Card - Windows & Linux is updated in real time on Compiral. Retailers showing "In stock" can usually deliver quickly, often within 2 to 5 working days. If the product is temporarily out of stock at one retailer, check the other offers in our table. Check back regularly as stock levels change frequently in the Informatique category.

Where can I buy the StarTech.com 2-port PCI Express RS232 Serial Adapter Card - PCIe RS232 Serial Host Controller Card - PCIe to Dual Serial DB9 Card - 16950 UART - Expansion Card - Windows & Linux at the best price?

To buy the StarTech.com 2-port PCI Express RS232 Serial Adapter Card - PCIe RS232 Serial Host Controller Card - PCIe to Dual Serial DB9 Card - 16950 UART - Expansion Card - Windows & Linux at the best price, compare all available offers in our table at the top of this page. The 3 offers listed include delivery costs to give you the true total cost. Sort by ascending price and filter by free delivery to quickly identify the best deal among our verified partner retailers.

How does the StarTech.com 2-port PCI Express RS232 Serial Adapter Card - PCIe RS232 Serial Host Controller Card - PCIe to Dual Serial DB9 Card - 16950 UART - Expansion Card - Windows & Linux compare to competitors in the Informatique category?

In the Informatique category, the StarTech.com 2-port PCI Express RS232 Serial Adapter Card - PCIe RS232 Serial Host Controller Card - PCIe to Dual Serial DB9 Card - 16950 UART - Expansion Card - Windows & Linux occupies a specific market segment. Compared to other available models, it stands out mainly through the balance between its features and its price. To compare objectively, consult the detailed spec sheet on this page and compare specifications with other similar products listed on our comparison tool.

Is the StarTech.com 2-port PCI Express RS232 Serial Adapter Card - PCIe RS232 Serial Host Controller Card - PCIe to Dual Serial DB9 Card - 16950 UART - Expansion Card - Windows & Linux suitable for beginners?

Yes, the StarTech.com 2-port PCI Express RS232 Serial Adapter Card - PCIe RS232 Serial Host Controller Card - PCIe to Dual Serial DB9 Card - 16950 UART - Expansion Card - Windows & Linux is generally appreciated by both beginners and regular users of the Informatique category. It is quick to set up and StarTech.com usually provides clear documentation. If you are new to this product category, consult the spec sheet on this page to identify the key criteria to check before making your choice.

Is there a refurbished version of the StarTech.com 2-port PCI Express RS232 Serial Adapter Card - PCIe RS232 Serial Host Controller Card - PCIe to Dual Serial DB9 Card - 16950 UART - Expansion Card - Windows & Linux?

Refurbished versions of the StarTech.com 2-port PCI Express RS232 Serial Adapter Card - PCIe RS232 Serial Host Controller Card - PCIe to Dual Serial DB9 Card - 16950 UART - Expansion Card - Windows & Linux may be available from certain Compiral partner retailers. These refurbished products allow you to save between 20% and 40% compared to the new price while still benefiting from a warranty. Check availability in our offers table and review the warranty conditions offered by the retailer.

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