StarTech PEX2S953 2-Port PCIe RS232 Serial Adapter Card

Name: StarTech PEX2S953 2-Port PCI Express PEX2S953
Brand: StarTech
SKU: 3455912
Price: 59.99 EUR
Availability: InStock

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StarTech PEX2S953 2-Port PCI Express RS232 Serial Adapter Card with 16950 UART

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Short description

The StarTech PEX2S953 is a 2-port PCI Express RS232 serial adapter card featuring the Asix AX99100 chipset and 16950 UART. It supports baud rates up to 921.6 Kbit/s and includes a 256-byte FIFO buffer for reliable data transmission. Designed for industrial and professional applications, this internal PCIe expansion card provides two DB9 serial ports, ensuring broad compatibility with Windows and Linux operating systems for legacy device connectivity.

Available for order: 82 pcs.

Warranty: 2 Years

SKU: 3455912

Manufacturer: StarTech

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Deliver the order:

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to the Customer Service Center at Kengaraga 2b, Riga

06.07.2026 {{selectedOffer.officeDeliveryString}}

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Customer service center

2b. Kengaraga str., Riga, Latvia, LV-1063

06.07.2026 {{selectedOffer.officeDeliveryString}}

free

Courier Delivery Please note that in case of a large parcel additional delivery costs may apply!

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From 4.99 € (Weight: 0.15 kg)

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Latvijas Pasts pakomāts / Unisend LV / DPD Paku skapis / Omniva LV / Venipak Pickup LV / Venipak Locker LV / Latvijas Pasts nodaļa

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From 1.99 €

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Bank transfer, Bank cards on-line, Apple Pay, Google Pay

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Product information

Description

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

Specifications

Host interface:: PCIe
Weight:: 0.056 kg
Internal:: Yes
Output interface:: Serial
Product colour:: Green

All features

Operational conditions

Operating relative humidity (H-H):: 5 - 85
Storage temperature (T-T):: -20 - 100
Operating temperature (T-T):: -10 - 80

Technical details

Sustainability compliance:: Yes
Compliance certificates:: CE, RoHS

Ports & interfaces

Serial interface type:: RS-232
Serial ports quantity:: 2
Host interface:: PCIe
Output interface:: Serial
Expansion card standard:: PCIe 1.1

Other features

Quantity:: 1

Weight & dimensions

Weight:: 0.056 kg
Package weight:: 136 g
Height:: 15 mm
Width:: 63 mm
Depth:: 75 mm

System requirements

Windows operating systems supported:: Windows 7, Windows 7 Home Basic x64, Windows 10 x64, Windows 10 Pro x64, Windows 10 Pro, Windows 10 IOT Core, Windows 10 Home x64, Windows 10 Home, Windows 10 Enterprise x64, Windows 10 Enterprise, Windows 10 Education x64, Windows 10 Education, Windows 7 Enterprise, Windows 7 Enterprise x64, Windows 7 Home Basic, Windows 7 Home Premium, Windows 7 Home Premium x64, Windows 7 Professional, Windows 7 Ultimate x64, Windows 7 Professional x64, Windows 7 Starter, Windows 7 Starter x64, Windows 7 Ultimate, Windows 7 x64, Windows 8.1 x64, Windows 8.1 Pro x64, Windows 8.1 Pro, Windows 8.1 Enterprise x64, Windows 8.1 Enterprise, Windows 8.1, Windows 8 x64, Windows 8 Pro x64, Windows 8 Pro, Windows 8 Enterprise x64, Windows 8 Enterprise, Windows 8, Windows 10
Linux operating systems supported:: Y
Server operating systems supported:: Windows Server 2016, Windows Server 2012 R2, Windows Server 2012, Windows Server 2008 R2, Windows Server 2003

Design

Internal:: Yes
Product colour:: Green

Performance

Mean time between failures (MTBF):: 222366 h
Chipset:: Asix AX99100

Logistics data

Master (outer) case height:: 306 mm
Master (outer) case width:: 685 mm
Master (outer) case length:: 345 mm
Products per master (outer) case:: 75 pc(s)
Harmonized System (HS) code:: 84733020

Features

Baud rate:: 921.6 Kbit/s
Data bits:: 7, 5, 6, 8, 9
Stop bits:: 1, 1.5, 2
Parity bit:: Even, Mark, N, Odd, Space
Flow Control type:: XON/XOFF, N, RTS/CTS
FIFO (First In, First Out):: 256

Packaging data

Package depth:: 142 mm
Package height:: 30 mm
Package width:: 170 mm
Quick installation guide:: Yes

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Instructions

startech-PEX2S953-3455912.pdf

Description

Instructions

startech-PEX2S953-3455912.pdf

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Customer reviews

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Customer questions

FAQ

How much does the StarTech PEX2S953 2-Port PCIe RS232 Serial Adapter Card cost, and is it available for purchase?

The price is 59.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 82 pcs. are in stock, and you can place your purchase right now with delivery across Latvia and Europe or choose pickup at the Riga collection point. We offer favorable purchase terms, including the option to split the payment into convenient monthly installments. Availability and price are updated in real time, so we recommend placing your order in advance.

If I order this product today, when will I receive my order?

If you place your order today, delivery will be as fast and convenient as possible. You will be able to pick up your order on 06.07.2026 at the Riga pickup point or choose delivery across Latvia and Europe. We carefully inspect every purchase and pack it securely for safe transportation.

What payment options are available?

AiO.lv offers several payment methods: Bank transfer, Bank cards on-line, Apple Pay, Google Pay. All transactions are 100% secure and encrypted.

Can this product be purchased for a company (with VAT)?

Yes. AiO.lv works with legal entities in Latvia and across Europe. The product price already includes VAT. For certain product categories, as well as for companies from other EU countries with a valid VAT number, a 0% VAT rate may apply. We issue the invoice immediately after the order is placed, support electronic BIS invoices, and automatically generate all necessary accounting documents. You can complete the purchase for a company online — simply select the company profile and choose bank transfer as the payment method during checkout.

What is the warranty period?

All StarTech products come with an official 2 Years warranty. It covers all manufacturing defects and malfunctions that may occur during use. The warranty is valid at all authorized StarTech service centers and through AiO.lv

Can the product be returned after purchase?

Yes, you can return the product within 14 days of purchase if you bought it as a consumer (not a legal entity). Returns are possible without giving any reason — the main condition is that the product retains its original appearance and full set of accessories. We will make the process as simple and convenient as possible: just contact our customer support team, and we will help you arrange the return.

Where should I contact for warranty service?

For warranty-related questions you can contact the AiO.lv (SIA VSPRO) customer support team. We will assist with consultation, warranty claim processing, and coordination with certified service centers.

How can I tell if this product suits my needs?

When making a choice, we recommend paying attention to the key features: host interface, weight, internal, output interface, product colour, compatibility with your devices or usage conditions, material quality, functionality, and warranty terms. These characteristics will help you determine how well the model meets your needs.

Where can I download the instructions for StarTech PEX2S953 2-Port PCIe RS232 Serial Adapter Card?

You can download the instructions in PDF format from the “Instructions” section on the product description page. The file contains complete information about installation, setup, and usage.

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StarTech PEX2S953 2-Port PCI Express RS232 Serial Adapter Card with 16950 UART

Short description

Product information

Description

Specifications

Operational conditions

Technical details

Ports & interfaces

Other features

Weight & dimensions

System requirements

Design

Performance

Logistics data

Features

Packaging data

Instructions

Description

Instructions

Similar products

Customer reviews

Customer questions

How much does the StarTech PEX2S953 2-Port PCIe RS232 Serial Adapter Card cost, and is it available for purchase?

If I order this product today, when will I receive my order?

What payment options are available?

Can this product be purchased for a company (with VAT)?

What is the warranty period?

Can the product be returned after purchase?

Where should I contact for warranty service?

How can I tell if this product suits my needs?

Where can I download the instructions for StarTech PEX2S953 2-Port PCIe RS232 Serial Adapter Card?