2-port PCI Express RS232 Serial Adapter Card StarTech PEX2S953LP

Name: 2-port PCI Express RS232 Serial PEX2S953LP
Brand: StarTech
SKU: 2116299
Price: 64.49 EUR
Availability: InStock

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Offer for legal entity, cashless payment. Why is an item available only for a legal entity?
This is due to long delivery times and limited product warranties.

Short description

The StarTech 2-port PCI Express RS232 Serial Adapter Card (PEX2S953LP) offers reliable serial communication with a 16950 UART chipset, supporting baud rates up to 921.6 Kbit/s. It features a low profile design, making it ideal for compact systems. Compatible with Windows and Linux operating systems, this card is perfect for connecting serial devices in various environments. With a mean time between failures (MTBF) of 222366 hours, it ensures long-lasting performance.

Available at price 64.49 €: 10 pcs.

Total available for order: 63 pcs.

Warranty: 2 Years

SKU: 2116299

Manufacturer: StarTech

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Deliver the order:

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From 4.99 € (Weight: 0.15 kg)

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Payment Methods:

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

Available for private customers at price 74.49 €: 20 pcs.

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Product information

Description

The StarTech 2-port PCI Express RS232 Serial Adapter Card (PEX2S953LP) adds two DB9 RS232 serial ports to a computer via a PCI Express slot. It uses an Asix AX99100 chipset with industry-standard 16950 UART support and provides serial communication at baud rates up to 921.4 Kbps. The card ships with a low-profile bracket and an optional full-profile bracket, and is compatible with Windows and Linux operating systems.

Advantages

This PCIe to serial adapter offers broad OS compatibility for mixed environments, support for high baud rates up to 921.4 Kbps, and a 256-byte FIFO for both transmit and receive to improve data handling. The card supplies 5/12V power on Pin 9 when external power is connected and complies with PCI Express 1.1 standards. Its low-profile form factor and included full-profile bracket simplify installation in different system cases.

Suitable for

Connecting card readers and payment terminals
Integrating serial printers and receipt printers
Attaching POS devices such as PIN pads
Connecting external modems and legacy serial instruments

Key specifications

Model: PEX2S953LP
Interface: PCI Express (PCIe 1.1 compliant)
Ports: 2 x DB9 RS232
Chipset: Asix AX99100
UART: Industry standard 16950
Maximum baud rate: up to 921.4 Kbps
FIFO depth: 256 bytes per transmitter and receiver
Power output: 5/12V on Pin 9 (requires external power)
Compatibility: Windows and Linux
Form factor: Low-profile with optional full-profile bracket
Internal card: Yes
Weight: 0.0556 kg

How to use

Power down the computer and insert the PEX2S953LP into an available PCI Express slot. Choose and install the appropriate bracket (low-profile or full-profile) to match the computer case. If required by your serial devices, connect external power so the card can supply 5/12V on Pin 9. Boot the system and install the manufacturer drivers or use built-in OS drivers for Windows or Linux. After drivers are installed, the two RS232 COM ports will be available to configure in your operating system and applications.

Usage recommendations

Use the included low-profile bracket for small form-factor systems and swap to the full-profile bracket for standard towers. For reliable power to connected peripherals that require Pin 9 voltage, ensure the external power connector is attached. Test communication at lower baud rates first, then increase toward the maximum 921.4 Kbps if cable length and device capabilities allow.

Specifications

Host interface:: Mini PCI Express
Weight:: 0.0556 kg
Internal:: Yes
Output interface:: Serial

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

Compliance certificates:: RoHS

Ports & interfaces

Serial interface type:: RS-232
Serial ports quantity:: 2
Host interface:: Mini PCI Express
Peripheral (Molex) power connectors (4-pin):: 1
Output interface:: Serial
Expansion card standard:: PCIe 1.1

Other features

Quantity:: 1
Manual:: Yes

Weight & dimensions

Weight:: 0.0556 kg
Package weight:: 146.4 g
Height:: 18 mm
Width:: 67 mm
Depth:: 98 mm

System requirements

Windows operating systems supported:: Windows 8, Windows 7 x64, Windows 7 Ultimate x64, Windows 7 Ultimate, Windows 7 Starter x64, Windows 7 Starter, Windows 7 Professional x64, Windows 7 Professional, Windows 7 Home Premium x64, Windows 7 Home Premium, Windows 7 Home Basic x64, Windows 10 x64, Windows 7 Home Basic, Windows 7 Enterprise x64, Windows 7 Enterprise, Windows 7, Windows 10 Home x64, Windows 8.1 Pro, Windows 8.1 x64, Windows 8.1 Pro x64, Windows 8 Enterprise, 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 10 Pro, Windows 10 Pro x64, Windows 10, Windows 10 Education, Windows 10 Education x64, Windows 10 Enterprise, Windows 10 Enterprise x64, Windows 10 Home, Windows 10 IOT Core, Windows 10 IoT Enterprise
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

Performance

Certification:: CE, FCC
Mean time between failures (MTBF):: 222366 h
Chipset:: Asix AX99100

Logistics data

Master (outer) case height:: 317 mm
Master (outer) case width:: 355 mm
Master (outer) case length:: 690 mm
Products per master (outer) case:: 75 pc(s)
Harmonized System (HS) code:: 84733020

Features

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

Packaging data

Package depth:: 172 mm
Package height:: 32 mm
Package width:: 142 mm
Mounting brackets included:: Yes

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Instructions

mmo_69943347_1608025966_9132_3679.pdf

startech-PEX2S953LP-2116299.pdf

Description

Instructions

mmo_69943347_1608025966_9132_3679.pdf

startech-PEX2S953LP-2116299.pdf

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Warehouse	Stock	Delivery to the store	Store Price
WH354	20	30.06.2026	74.49 €

Available only for legal entities
Warehouse	Stock	Delivery to the store	Store Price
WH15	10	19.06.2026 Best delivery	64.49 € Best price
EU9	13	19.06.2026 Best delivery	66.49 €
WH109	10	07.07.2026	68.49 €
EU6	10	19.06.2026 Best delivery	76.99 €

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74.49 €

Stock: 20

Delivery Date: 30.06.2026

Warehouse: WH354

Available only for legal entities

64.49 €

Stock: 10

Delivery Date: 19.06.2026 Best delivery

Warehouse: WH15

66.49 €

Stock: 13

Delivery Date: 19.06.2026 Best delivery

Warehouse: EU9

68.49 €

Stock: 10

Delivery Date: 07.07.2026

Warehouse: WH109

76.99 €

Stock: 10

Delivery Date: 19.06.2026 Best delivery

Warehouse: EU6

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Customer questions

FAQ

How much does the 2-port PCI Express RS232 Serial Adapter Card StarTech PEX2S953LP cost, and is it available for purchase?

The price is 64.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 63 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 19.06.2026 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: Cash payment, 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, 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 2-port PCI Express RS232 Serial Adapter Card StarTech PEX2S953LP?

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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