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header-product 2-port PCI Express RS232 Serial Adapter Card StarTech PEX2S953LP
65.99 €
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AiO.lv Computer Components Desktops accessories I/O Adapters & Controllers StarTech

2-port PCI Express RS232 Serial Adapter Card StarTech PEX2S953LP

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2-port PCI Express RS232 Serial Adapter Card StarTech PEX2S953LP
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2-port PCI Express RS232 Serial Adapter Card StarTech PEX2S953LP

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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 65.99 €: 8 pcs.
Total available for order: 142 pcs.
Warranty: 2 Years
SKU: 2116299
Manufacturer: StarTech
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Pick-up points

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Cost

1.99 €

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2b. Kengaraga str., Riga, Latvia, LV-1063
29.10.2026 {{selectedOffer.officeDeliveryString}}
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03.11.2026 {{selectedOffer.courierDeliveryString}}
From 4.99 € (Weight: 0.15 kg)
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Available for private customers at price 66.99 €: 55 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

Internal: The product is built in.
Yes
Host interface: Interface that enables a host controller to communicate with a driver.
Mini PCI Express
Output interface: The socket (port) where the output connectors are connected.
Serial
All features

Weight & dimensions

Package weight: Weight of the packaged product.
146.4 g
Weight: Weight of the product without packaging (net weight). If possible, the net weight is given including standard accessories and supplies. Please note that sometimes the manufacturer leaves out the weight of accessories and/or supplies.
0.0556 kg
Height: The measurement of the product from head to foot or from base to top.
18 mm
Depth: The distance from the front to the back of something.
98 mm
Width: The measurement or extent of something from side to side.
67 mm

Operational conditions

Operating relative humidity (H-H):
5 - 85
Storage temperature (T-T): The minimum and maximum temperatures at which the product can be safely stored.
-20 - 100
Operating temperature (T-T): The minimum and maximum temperatures at which the product can be safely operated.
-10 - 80

System requirements

Server operating systems supported:
Windows Server 2016, Windows Server 2012 R2, Windows Server 2012, Windows Server 2003, Windows Server 2008 R2
Linux operating systems supported: 8 RT. Linux (9.4, 9.5), Red Hat Enterprise Linux 5.0 (supported with a pre-built package); SUSE Linux (10.3, 11.0, 11, 11.1, 11.2), Fedora (9, 9.0, 10, 10.0, 11.0, 11, 12, 12.0), Ubuntu (8.04, 8.04.1, 8.04.2, 8.10, 9.04, 9.10, 10.04), Debian (5.0, 5.0.1, 5.0.2, 5.0.3)
Yes
Windows operating systems supported: Windows vesions wich can be used with the device.
Windows 7 Professional, Windows 7 Enterprise x64, Windows 7 Home Premium x64, Windows 7 Home Premium, Windows 7 Home Basic x64, Windows 7 Home Basic, 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 IoT Enterprise, Windows 10 Pro, Windows 10 Pro x64, Windows 10 x64, Windows 7, Windows 7 Enterprise, Windows 7 Starter, 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 7 x64, Windows 7 Ultimate x64, Windows 7 Ultimate, Windows 7 Starter x64, Windows 7 Professional x64

Other features

Quantity: The number of products there are.
1
Manual:
Yes

Logistics data

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

Packaging data

Package height: The distance from the top to the bottom of the packaging.
32 mm
Package depth: The distance from the front to the back of the packaging.
172 mm
Package width: The distance from one side of the packaging to the other.
142 mm
Mounting brackets included:
Yes

Technical details

Compliance certificates: Indicates which regulatory, safety, and environmental standards the product complies with, as verified by recognized authorities or certification bodies.
RoHS

Features

Flow Control type:
RTS/CTS, XON/XOFF, No
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
Baud rate:
921.6 Kbit/s

Design

Internal: The product is built in.
Yes

Ports & interfaces

Peripheral (Molex) power connectors (4-pin): White 4-pinned connector used to connect a peripheral to the power supply.
1
Serial interface type:
RS-232
Serial ports quantity: The number of serial ports in a computer or peripheral. A serial port is a serial communication physical interface through which information transfers in or out one bit at a time. The term "serial port" usually identifies hardware more or less compliant to the RS-232 standard, intended to interface with a modem or with a similar communication device. In modern computers and peripherals, serial ports have largely been replaced by USBs and other interfaces.
2
Expansion card standard:
PCIe 1.1
Host interface: Interface that enables a host controller to communicate with a driver.
Mini PCI Express
Output interface: The socket (port) where the output connectors are connected.
Serial

Performance

Certification:
CE, FCC
Mean time between failures (MTBF): Statistical model used to indicate product/mechanism reliability; expressed in hours and percentage of duty cycle. This number (in hours) does not indicate the mean time before failure for a single unit/mechanism.
222366 h
Chipset: Set of electronic components in an integrated circuit that manages the data flow between the processor, memory and peripherals. It is usually found in the motherboard of a computer. Chipsets are usually designed to work with a specific family of microprocessors. Because it controls communications between the processor and external devices, the chipset plays a crucial role in determining system performance.
Asix AX99100
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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
Machine translation. Load original

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Stock data
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WH354 55 15.10.2026 Best delivery
66.99 €
WH94 30 15.10.2026 Best delivery
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WH15 9 15.10.2026 Best delivery
66.99 €
EU9 30 15.10.2026 Best delivery
69.49 €
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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 65.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 142 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 29.10.2026 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: internal, host interface, 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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