StarTech.com 4-port PCI Express RS232 Serial Adapter Card - PCIe RS232 Serial Host Controller Card - PCIe to Serial DB9 - 16950 UART - Low Profile Expansion Card - Windows/Linux - TAA

StarTech.com 4-port PCI Express RS232 Serial Adapter Card - PCIe RS232 Serial Host Controller Card - PCIe to Serial DB9 - 16950 UART - Low Profile Expansion Card - Windows/Linux - TAA

Brand StarTech.com

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£96.71

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You save £4.28 (4%)

3 offers at 3 retailers

Listed since 7 April 2026

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Description

4 PORT SERIAL CARD: Serial controller card w/16950 UART based on ASIX AX99100, allows 4x DB9 ports w/bi-directional RS232 speeds up to 921.6Kbps per port, available 256 byte FIFO buffer; Upgraded version of our popular card PEX4S952LP. OPTIONAL CONFIGURABLE POWER: PCIe multiport serial card provides 12v, 5v, or none through pin 9 w/up to 2A total; Each of the 4 ports are individually configurable; DB44 to 4x DB9 breakout cable incl. STANDARD PROFILE & LOW PROFILE BRACKET: PCI Express RS232 serial adapter card has low profile bracket pre-installed & 1x standard bracket incl for versatile install; Supports Windows XP and up & Linux. VERSATILE APPLICATIONS: For low/standard 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; 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 PCI Express RS232 serial adapter card lets you add four RS232 (DB9) serial ports to your computer through a PCI Express (PCIe) slot. 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 PCI E serial card is easy to integrate into mixed environments. The card comes pre-configured with low-profile brackets and includes optional full-profile brackets, so installation is easy regardless of the case form factor. This card is a direct replacement for PEX4S952LP .. 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 921.6Kbps. • 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. 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.. PEX4S03LP is backed by a StarTech.com lifetime warranty and free lifetime technical support.. The StarTech.com Advantage. Ports & interfaces. Expansion card standard. PCIe 1.1. Output interface. Serial. Host interface. PCIe. Design. Certification. CE, FCC. Mean time between failures (MTBF). 214358 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. Compliance certificates. 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 8.1, 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. 264 g. Height. 18 mm. Depth. 63 mm. Width. 75 mm. Packaging data. Package weight. 370 g. Package height. 51 mm. Package depth. 149 mm. Package width. 213 mm. Quick installation guide. Yes. Mounting brackets included. Yes. Cables included. Serial. Quantity. 1. Logistics data. Master (outer) case height. 235 mm. Master (outer) case length. 350 mm. Master (outer) case width. 480 mm. Products per master (outer) case. 16 pc(s). Harmonized System (HS) code. 84733020. leaflet. manual pdf

Full specifications

Marque StarTech.com
Référence fabricant pex4s953lp
PORT SERIAL CARD Serial controller card w/16950 UART based on ASIX AX99100
OPTIONAL CONFIGURABLE POWER PCIe multiport serial card provides 12v
LOW PROFILE BRACKET PCI Express RS232 serial adapter card has low profile bracket pre-installed & 1x
VERSATILE APPLICATIONS For low/standard profile desktop/servers w/ uses in point of sale terminals
COM ADVANTAGE IT professionals choice for over 30 years
Supports The Following Features . • Compatible with industry-standard 16950 UART. • Supports max baud rate of up

StarTech.com 4-port PCI Express RS232 Serial Adapter Card - PCIe RS232 Serial Host Controller Card - PCIe to Serial DB9 - 16950 UART - Low Profile Expansion Card - Windows/Linux - TAA: complete technical analysis for 2026

The StarTech.com 4-port PCI Express RS232 Serial Adapter Card - PCIe RS232 Serial Host Controller Card - PCIe to Serial DB9 - 16950 UART - Low Profile Expansion Card - Windows/Linux - TAA meets the expectations of buyers who want a quality product without paying over the odds. Thanks to our comparison tool, find the best offer among all partner retailers listed on Compiral. The trust rating shown for each retailer helps you choose a reliable shop with clear return conditions and responsive customer service. If you are unsure, also check the StarTech.com 7 Port PCI USB Card Adapter from the same brand. A good price comparison can save you between 10% and 30% on your purchase depending on the time of year and available retailers.

Who is this Informatique for?

The StarTech.com 4-port PCI Express RS232 Serial Adapter Card - PCIe RS232 Serial Host Controller Card - PCIe to Serial DB9 - 16950 UART - Low Profile Expansion Card - Windows/Linux - TAA benefits from the expertise of StarTech.com in this category. Its design meets current market standards and satisfies even the most demanding users in their everyday activities. The brand's reliability translates into positive feedback from regular buyers, who particularly appreciate the consistency between the promises of the product sheet and the real-world experience. For the Informatique category, this is an option we recommend without hesitation.

For intensive or occasional use

The StarTech.com 4-port PCI Express RS232 Serial Adapter Card - PCIe RS232 Serial Host Controller Card - PCIe to Serial DB9 - 16950 UART - Low Profile Expansion Card - Windows/Linux - TAA adapts to different levels of use in the Informatique category. Whether you use it intensively every day or more occasionally, this StarTech.com product offers appreciated versatility. Regular users value its reliability over time, while occasional users appreciate how easy it is to pick up without any special training. For even more demanding use, also check the StarTech.com 7 Port PCI USB Card Adapter.

Against the competition

In the Informatique market, the StarTech.com 4-port PCI Express RS232 Serial Adapter Card - PCIe RS232 Serial Host Controller Card - PCIe to Serial DB9 - 16950 UART - Low Profile Expansion Card - Windows/Linux - TAA is well positioned thanks to its price from £96.71 and the strength of StarTech.com. Our comparison tool lets you verify in real time whether this positioning still holds against other available offers.

Market price ranges in 2026

RangeIndicative price
Entry-levelUnder 391990 £
Mid-range391990 £ to 914640 £
High-endOver 914640 £

The best times to buy the StarTech.com 4-port PCI Express RS232 Serial Adapter Card - PCIe RS232 Serial Host Controller Card - PCIe to Serial DB9 - 16950 UART - Low Profile Expansion Card - Windows/Linux - TAA at a lower price are Black Friday in November, the January sales and the summer sales in July. Our price history lets you judge whether the current price is a genuine bargain or whether it is worth waiting a few weeks. Outside these periods, flash promotions remain frequent among Compiral's partner retailers.

Frequently asked questions about StarTech.com 4-port PCI Express RS232 Serial Adapter Card - PCIe RS232 Serial Host Controller Card - PCIe to Serial DB9 - 16950 UART - Low Profile Expansion Card - Windows/Linux - TAA

How does the StarTech.com 4-port PCI Express RS232 Serial Adapter Card - PCIe RS232 Serial Host Controller Card - PCIe to Serial DB9 - 16950 UART - Low Profile Expansion Card - Windows/Linux - TAA compare to competitors in the Informatique category?

In the Informatique category, the StarTech.com 4-port PCI Express RS232 Serial Adapter Card - PCIe RS232 Serial Host Controller Card - PCIe to Serial DB9 - 16950 UART - Low Profile Expansion Card - Windows/Linux - TAA 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 4-port PCI Express RS232 Serial Adapter Card - PCIe RS232 Serial Host Controller Card - PCIe to Serial DB9 - 16950 UART - Low Profile Expansion Card - Windows/Linux - TAA suitable for beginners?

Yes, the StarTech.com 4-port PCI Express RS232 Serial Adapter Card - PCIe RS232 Serial Host Controller Card - PCIe to Serial DB9 - 16950 UART - Low Profile Expansion Card - Windows/Linux - TAA 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 4-port PCI Express RS232 Serial Adapter Card - PCIe RS232 Serial Host Controller Card - PCIe to Serial DB9 - 16950 UART - Low Profile Expansion Card - Windows/Linux - TAA?

Refurbished versions of the StarTech.com 4-port PCI Express RS232 Serial Adapter Card - PCIe RS232 Serial Host Controller Card - PCIe to Serial DB9 - 16950 UART - Low Profile Expansion Card - Windows/Linux - TAA 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.

When do prices for the StarTech.com 4-port PCI Express RS232 Serial Adapter Card - PCIe RS232 Serial Host Controller Card - PCIe to Serial DB9 - 16950 UART - Low Profile Expansion Card - Windows/Linux - TAA drop during the year?

Prices for the StarTech.com 4-port PCI Express RS232 Serial Adapter Card - PCIe RS232 Serial Host Controller Card - PCIe to Serial DB9 - 16950 UART - Low Profile Expansion Card - Windows/Linux - TAA typically drop during Black Friday (November), the January sales and the summer sales (July). Promotional deals are also common around Cyber Monday and the holiday season. Our price history lets you spot trends and assess whether a price drop is likely soon in the Informatique category.

Is delivery free for the StarTech.com 4-port PCI Express RS232 Serial Adapter Card - PCIe RS232 Serial Host Controller Card - PCIe to Serial DB9 - 16950 UART - Low Profile Expansion Card - Windows/Linux - TAA at all retailers?

Free delivery is not guaranteed for the StarTech.com 4-port PCI Express RS232 Serial Adapter Card - PCIe RS232 Serial Host Controller Card - PCIe to Serial DB9 - 16950 UART - Low Profile Expansion Card - Windows/Linux - TAA at every retailer. Some include it in their price, others charge separately. On Compiral, use the free delivery filter to display only offers with free postage. The total price shown in our table always includes delivery costs for a true cost comparison.

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