{{ totalProductsCount }}
In cart {{totalProductsCount}} item(s)

In cart {{totalProductsCount}} item(s)

Total:
{{sum | formatAmount}}

Your cart is empty

header-product 4-port PCI Express RS232 Serial Adapter Card StarTech.com PEX4S953LP Low Profile
129.99 €
Minimum search length 3 characters
{{searchQuery.text}}
{{shortcut.title}}
{{searchString}} → {{searchInCategorySuggest.title}}
{{category.title}}
{{category.path}}
AiO.lv Computer Components Desktops accessories I/O Adapters & Controllers StarTech

4-port PCI Express RS232 Serial Adapter Card StarTech.com PEX4S953LP Low Profile

4-port PCI Express RS232 Serial Adapter Card StarTech.com PEX4S953LP Photo 1
4-port PCI Express RS232 Serial Adapter Card StarTech.com PEX4S953LP Photo 1
4-port PCI Express RS232 Serial Adapter Card StarTech.com PEX4S953LP Low Profile
129.99 €
Keep track of price changes You keep track of price changes
Watch the price drop

Leave your address - as soon as the price of the product goes down, you'll know about it right away

You keep track of price changes

4-port PCI Express RS232 Serial Adapter Card StarTech.com PEX4S953LP Low Profile

{{email}}
You keep track of price changes

4-port PCI Express RS232 Serial Adapter Card StarTech.com PEX4S953LP Low Profile

{{email}}
{{selectedOffer && selectedOffer.price | formatAmount}}
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.com 4-port PCI Express RS232 Serial Adapter Card features a PCIe interface, 16950 UART, and supports Windows and Linux. It provides reliable serial communication with a baud rate of 921.6 Kbit/s and a low profile design for compact installations.
Available at price 129.99 €: 8 pcs.
Total available for order: 63 pcs.
Warranty: 2 Years
SKU: 10974035
Manufacturer: StarTech
Learn more
free shipment

Cheapest delivery:

Unisend LV

Pick-up points

Unisend LV

Cost

1.79 €

Deliver

{{selectedOffer.parcelStationDeliveryString}}

All delivery methods Hide details
Customer service center
2b. Kengaraga str., Riga, Latvia, LV-1063
26.08.2026 {{selectedOffer.officeDeliveryString}}
free
Courier Delivery Please note that in case of a large parcel additional delivery costs may apply!
31.08.2026 {{selectedOffer.courierDeliveryString}}
From 4.99 € (Weight: 0.37 kg)
Parcel couriers
Unisend LV / Venipak Pickup LV / Venipak Locker LV / Latvijas Pasts pakomāts / DPD Paku skapis / Omniva LV / Latvijas Pasts nodaļa
31.08.2026 {{selectedOffer.parcelStationDeliveryString}}
From 1.79 €
More about delivery methods
payment
Payment Methods:
Bank transfer
More about payment methods
Together cheaper
{{product.price | formatAmount}}
{{product.title}}
{{productBundle.reference.specialPrice | formatAmount}}
{{productBundle.title}}
{{productBundlePreviousPrice | formatAmount}}
{{productBundleSpecialPrice | formatAmount}}

You saving {{productBundleYouSave | formatAmount}}

Product information

Description

The StarTech.com 4-port PCI Express RS232 Serial Adapter Card (PEX4S953LP) adds four DB9 RS232 serial ports to a computer via a PCI Express slot. Designed for reliable serial communication, the card supports industry-standard 16950 UART and a maximum baud rate of 921.6 Kbps. It includes low-profile brackets and optional full-profile brackets for installation in different chassis, and is compatible with Windows and Linux.

Advantages

This PCIe to serial adapter provides four independent RS232 ports with 256-byte FIFO buffers per transmitter and receiver, support for multiple data bit lengths (9, 8, 7, 6, or 5 bits per port), and 5/12V output on pin 9 when external power is present. The card uses the Asix AX99100 chipset and is PCI Express 1.1 compliant, offering broad OS compatibility and a compact low-profile design for space-constrained systems.

Suitable for

  • Connecting serial printers, card readers, and PIN pads to modern PCs
  • Integrating legacy serial devices in POS and retail environments
  • Installing in kiosks, ATMs, or embedded workstations
  • Adding serial ports to Windows- or Linux-based systems for device control or telemetry

Key specifications

  • Manufacturer: StarTech.com
  • Model / MPN: PEX4S953LP
  • Interface: PCI Express (PCIe) 1.1
  • Serial ports: 4 × RS232 (DB9)
  • UART: 16950-compatible
  • Maximum baud rate: 921.6 Kbps
  • FIFO: 256-byte depth per transmitter/receiver
  • Chipset: Asix AX99100
  • Power output: 5/12V on Pin 9 (when external power connected)
  • Form factor: Low-profile with optional full-profile brackets
  • OS compatibility: Windows and Linux
  • Weight: 0.264 kg
  • Product colour: Green

How to use

Power down the computer, install the card into an available PCIe slot and secure it with the appropriate bracket (low-profile or full-profile). If required by your serial devices, connect an external power source to enable 5/12V output on pin 9. Boot the system and install the appropriate drivers for your Windows or Linux distribution if they are not detected automatically. Configure port settings (baud rate, data bits, parity, stop bits) in your OS or application to match the connected device, up to 921.6 Kbps.

Usage recommendations

Use shielded serial cables for improved signal integrity in electrically noisy environments, and verify driver compatibility with your specific OS version. For installations in compact systems, confirm bracket selection before installation to ensure a proper fit.

Specifications

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

Weight & dimensions

Package weight: Weight of the packaged product.
370 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.
0.264 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.
63 mm
Width: The measurement or extent of something from side to side.
75 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 2012, Windows Server 2003, Windows Server 2008 R2, Windows Server 2012 R2, Windows Server 2016
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 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 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

Logistics data

Harmonized System (HS) code:
84733020
Products per master (outer) case:
16 pc(s)
Master (outer) case height:
235 mm
Master (outer) case length:
350 mm
Master (outer) case width:
480 mm

Packaging data

Package height: The distance from the top to the bottom of the packaging.
51 mm
Package depth: The distance from the front to the back of the packaging.
149 mm
Package width: The distance from one side of the packaging to the other.
213 mm
Quick installation guide:
Yes
Mounting brackets included:
Yes
Cables included:
Serial

Technical details

Sustainability certificates:
RoHS

Features

Flow Control type:
RTS/CTS, XON/XOFF, No
Parity bit:
Space, Odd, No, Mark, Even
Stop bits:
2, 1, 1.5
Data bits:
7, 9, 8, 5, 6
FIFO (First In, First Out):
256
Baud rate:
921.6 Kbit/s

Design

Product colour: The colour e.g. red, blue, green, black, white.
Green
Internal: The product is built in.
Yes

Ports & interfaces

Expansion card standard:
PCIe 1.1
Host interface: Interface that enables a host controller to communicate with a driver.
PCIe
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.
214358 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
Hide Show all

Instructions

mmo_77943592_1608026044_7332_1112.pdf
oem-PEX4S953LP-10974035.pdf

Description

Instructions

mmo_77943592_1608026044_7332_1112.pdf
oem-PEX4S953LP-10974035.pdf
Machine translation. Load original

Similar products

{{product.title}} Show details Hide details

{{highlightedFeature.featureTitle}}:

{{getProductFeatureValueById(product, highlightedFeature.featureId)}}

{{product.price | formatAmount}}
Might be useful
{{product.manufacturerName}}
{{product.categoryName}}
{{product.title}}
{{product.specialPrice}}
{{product.price}}
Stock data
Available only for legal entities
Warehouse Stock Delivery to the store Store Price
WH109 8 26.08.2026
129.99 € Best price
WH15 5 12.08.2026 Best delivery
141.99 €
EU9 50 12.08.2026 Best delivery
144.99 €
Available only for legal entities
129.99 €
Stock: 8
Delivery Date: 26.08.2026
Warehouse: WH109
141.99 €
Stock: 5
Delivery Date: 12.08.2026 Best delivery
Warehouse: WH15
144.99 €
Stock: 50
Delivery Date: 12.08.2026 Best delivery
Warehouse: EU9

Customer reviews

Show all reviews

Customer questions

FAQ

How much does the 4-port PCI Express RS232 Serial Adapter Card StarTech.com PEX4S953LP cost, and is it available for purchase?

The price is 129.99 € (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 26.08.2026 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. 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 4-port PCI Express RS232 Serial Adapter Card StarTech.com PEX4S953LP?

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.
Show all questions
{{totalProductsWishes}} {{totalProductsCompare}} {{totalProductsCount}}
We respect your privacy
We use cookies to ensure the full operation of our store. The information associated with cookies is not used to personally identify you, and the files themselves are stored on your device, under your control. Cookies are not used for purposes other than those stated in our Privacy policy. By continuing to use our site, you agree to the use of essential cookies. If you do not agree, please, leave this site.
We use cookies
Show info
We respect your privacy
We use cookies to ensure the full operation of our store. The information associated with cookies is not used to personally identify you, and the files themselves are stored on your device, under your control. Cookies are not used for purposes other than those stated in our Privacy policy. By continuing to use our site, you agree to the use of essential cookies. If you do not agree, please, leave this site.
Which cookie files we use?

The necessary technical cookies allow you to use the basic functions of the store, such as page navigation, ordering, access to secure sites and more. The site cannot function properly without these files.

Preferences cookies are used to save information that changes how the site works and looks.

Static cookies are used in order to help the sites owner understand how the users are interacting with the site.

Marketing cookies are used in order to track a users movements throughout the site in order to show interesting and relevant ads to the specific user.
warranty
14-Day Return Policy We are confident in our quality, but if the purchase doesn’t fit — you have 14 days to return the product with peace of mind.
shipping
Fast Delivery Get your orders as quickly as possible — right to your door, parcel lockers, or pickup points across Latvia and the EU.
payment
Secure Payment Pay the way you prefer: cash, VISA, MasterCard, Apple Pay, Google Pay, bank transfer, or 0% installment plan.
warranty
Quality Since 2008 AiO.lv has been on the market for over 18 years and has earned trust — with more than 6000 genuine positive reviews on Google.