StarTech.com 1-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

Manufacturer: Startech | Model: PEX1S953LP | Product ID: 5710 | Warranty: Lifetime
£47.81 (inc. VAT)
30 in stock
100% Money Back Guarantee - Risk Free

Product Technical Specification

Ports & interfaces
Host interfacePCIe
Output interfaceSerial
Expansion card standardPCIe 1.1
Serial ports quantity1
Serial interface typeRS-232
Peripheral (Molex) power connectors (4-pin)1
Design
InternalYes
Product colourGreen
Mean time between failures (MTBF)277385
Features
ChipsetAsix AX99100
Baud rate921.4
FIFO (First In, First Out)256
Data bits5,6,7,8,9
Stop bits1,1.5,2
Flow control supportYes
Parity bitEven,Mark,N,Odd,Space
Flow Control typeN,RTS/CTS,XON/XOFF
Operational conditions
Operating temperature (T-T)0 - 70
Storage temperature (T-T)-20 - 80
Operating relative humidity (H-H)20 - 80
System requirements
Windows operating systems supportedWindows 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 IoT Enterprise,Windows 10 Pro,Windows 10 Pro x64,Windows 10 x64,Windows 11,Windows 11 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
Linux operating systems supportedYes
Server operating systems supportedWindows Server 2003,Windows Server 2008 R2,Windows Server 2012,Windows Server 2012 R2,Windows Server 2016
Technical details
Sustainability complianceYes
Sustainability certificatesCE,RoHS
Weight & dimensions
Width67
Depth98
Height150
Weight44
Packaging data
Quantity1
Mounting brackets includedYes
ManualYes
Package width142
Package depth170
Package height30
Package weight112
Logistics data
Harmonized System (HS) code84733020
Products per master (outer) case75
Master (outer) case width360
Master (outer) case length685
Master (outer) case height315

Delivery Options

Economy Delivery
FREE
Economy Delivery

Economy Delivery (UK)

Estimated delivery date: Sun 07th Dec 2025 to Wed 10th Dec 2025
Business Express
£6.95
Business Express

Business Express

Estimated delivery date: Sat 06th Dec 2025 to Mon 08th Dec 2025
View all Delivery Options & International Rates
PCI Express to Serial Adapter | 921.4Kbps | Windows® and Linux® CompatibleThis 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 CompatibilityWith 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 TechnologyThis 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 compliantPEX1S953LP is backed by a StarTech.com lifetime warranty and free lifetime technical support.The StarTech.com Advantage
Ports & interfaces
Host interfacePCIe
Output interfaceSerial
Expansion card standardPCIe 1.1
Serial ports quantity1
Serial interface typeRS-232
Peripheral (Molex) power connectors (4-pin)1
Design
InternalYes
Product colourGreen
Mean time between failures (MTBF)277385
Features
ChipsetAsix AX99100
Baud rate921.4
FIFO (First In, First Out)256
Data bits5,6,7,8,9
Stop bits1,1.5,2
Flow control supportYes
Parity bitEven,Mark,N,Odd,Space
Flow Control typeN,RTS/CTS,XON/XOFF
Operational conditions
Operating temperature (T-T)0 - 70
Storage temperature (T-T)-20 - 80
Operating relative humidity (H-H)20 - 80
System requirements
Windows operating systems supportedWindows 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 IoT Enterprise,Windows 10 Pro,Windows 10 Pro x64,Windows 10 x64,Windows 11,Windows 11 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
Linux operating systems supportedYes
Server operating systems supportedWindows Server 2003,Windows Server 2008 R2,Windows Server 2012,Windows Server 2012 R2,Windows Server 2016
Technical details
Sustainability complianceYes
Sustainability certificatesCE,RoHS
Weight & dimensions
Width67
Depth98
Height150
Weight44
Packaging data
Quantity1
Mounting brackets includedYes
ManualYes
Package width142
Package depth170
Package height30
Package weight112
Logistics data
Harmonized System (HS) code84733020
Products per master (outer) case75
Master (outer) case width360
Master (outer) case length685
Master (outer) case height315

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We will despatch your order the very same day if we receive cleared payment by 12:00 pm Mon-Fri.

These delivery estimates apply when you order up to 12:00 pm Mon-Fri (excluding public holidays).

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Estimated delivery times are taken from the next available working day available for delivery. For example if an order was despatched on a working Wednesday by 3pm, the first available working day for delivery would be Thursday provided you placed your order by 3pm on the Wednesday. If the next available weekday is a UK bank holiday/public holiday then your order will be despatched on the next available working day.

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Our available delivery options*

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*All delivery times are estimated unless stated.

Product Returns Note

Buykingston offers a very flexible and hassle free returns policy. If for whatever reason you are not happy with the item purchased you can return it to us within 12months for a refund (for unused and unopened items) or within 30 days on opened and used items for a refund. This applies to items purchased direct through Buykingston  only.

Our 30 Day Returns Money Back Guarantee Satisfaction Guarantee:
For items opened and used and that are returned in a resellable condition.

Our 365 Day Returns Money Back Guarantee Satisfaction Guarantee:
For items that remain sealed and unused.

Some items are excluded from our moneyback guarantee unless they have developed a fault. These include;

- Headphones
- Earphones
- Custom made and designed products such as flash memory products with custom logo’s on them. E,g USB flash drives and memory cards with your own logo

Returns FAQs

What is your returns criteria?
On opened items 30 days from date of receipt or expected date of receipt on non tracked items.
On unopened items 365 days.

How do i go about returning my order?
Please contact us via our contact page with your order number where we will present you with an RMA number and returns label.

Do i need to contact you before returning my order?
Yes, to obtain an RMA number.

Does my item have to include its original packaging?
Yes for items that fall within our 30 day money back guarantee and our 365 day returns. Of course for faulty items we realise you may no longer have the packaging.

Who deals with the warranty on a faulty item?
We will. In some circumstances we may ask you to contact the manufacturer direct for assistance.

Please ensure you have read and comply in full with Section 11 & 13 of our terms and conditions which you can read here in full.