# 1-port PCI Express RS232 Serial Adapter Card StarTech PEX1S953LP

**URL:** https://aio.lv/en/product--startech-pex1s953lp--2093708
**Data updated:** 2025-12-29 10:36 (EET)
**Category:** I/O Adapters & Controllers
**Manufacturer:** StarTech
**Manufacturer code:** PEX1S953LP
**EAN:** 0065030881159
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 61.49 €
**Prices and availability valid until:** 2026-07-18 23:59
**Price without VAT (21%):** 50.82 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--startech-pex1s953lp--2093708

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 06.07.2026 | free |
| Pickup points | 09.07.2026 | 1.99 EUR |
| Courier delivery to door | 09.07.2026 | 4.99 EUR |

## Summary description

The StarTech.com 1-port PCI Express RS232 Serial Adapter Card (PEX1S953LP) provides a reliable serial connection with a 16950 UART chipset. It supports baud rates up to 921.4 Kbit/s and features a FIFO buffer of 256 B. Compatible with Windows and Linux operating systems, this low-profile expansion card is ideal for adding serial ports to your system. Dimensions: 67mm width, 98mm depth, 150mm height. MTBF of 277385 hours ensures durability.

## Long description

The StarTech 1-port PCI Express RS232 Serial Adapter Card (PEX1S953LP) adds a single DB9 RS232 serial port to a computer via a PCI Express slot. It uses an Asix AX99100 chipset with an industry-standard 16950-compatible UART, supports baud rates up to 921.4 Kbps, and provides a 128-byte FIFO per transmitter and receiver. The low-profile card includes an optional full-profile bracket for installation in different chassis and is compatible with Windows and Linux operating systems.
Advantages
This PCIe to serial adapter offers broad OS compatibility and a reliable UART implementation for consistent serial communication at high baud rates. The card supplies 5/12V power on Pin 9 when external power is connected, includes a 128-byte depth FIFO for both transmit and receive paths, and complies with PCI Express 1.1 standards. Its low-profile form factor with an included full-profile bracket simplifies installation in various system types.
Suitable for
Connecting serial devices such as card readers and POS printers
Integrating PIN pads and legacy modems into modern PCs
Industrial control systems that require RS232 ports
Mixed OS environments running Windows and Linux
Key specifications
Manufacturer: StarTech
Model: PEX1S953LP
Interface: PCI Express (PCIe 1.1 compliant)
Serial port: 1 × RS232 DB9
Chipset: Asix AX99100
UART compatibility: industry standard 16950-compatible
Maximum baud rate: up to 921.4 Kbps
FIFO: 128-byte per transmitter and receiver
Power on Pin 9: 5/12V when external power is connected
Form factor: low-profile with optional full-profile bracket
Dimensions (approx.): 67 mm W × 98 mm D × 150 mm H
Weight: 0.044 kg
Operating systems: Windows and Linux compatible
MTBF: 277385 hours
How to use
Insert the PEX1S953LP into an available PCIe slot on the motherboard, secure the card with the appropriate bracket for your chassis, and, if required, connect external power to enable Pin 9 power output. Install drivers or allow the operating system to load native drivers for Windows or Linux. After installation, connect the RS232 DB9 serial device and configure serial port parameters (baud rate, data bits, parity, stop bits) in your application or OS serial port settings.
Usage recommendations
Use appropriate RS232 cables and verify device wiring and power requirements before connecting. For maximum communication reliability, match the baud rate and UART settings on both the host and serial device, and ensure the system BIOS and OS have the PCIe slot enabled. In mixed environments, test driver compatibility on each target OS prior to deployment.

## Specifications

### Operational conditions

| Feature | Value |
|---|---|
| Operating relative humidity (H-H) | 20 - 80 |
| Storage temperature (T-T) | -20 - 80 |
| Operating temperature (T-T) | 0 - 70 |

### Technical details

| Feature | Value |
|---|---|
| Sustainability compliance | Yes |
| Compliance certificates | CE, RoHS |

### Ports & interfaces

| Feature | Value |
|---|---|
| Serial interface type | RS-232 |
| Serial ports quantity | 1 |
| Host interface | PCIe |
| Peripheral (Molex) power connectors (4-pin) | 1 |
| Output interface | Serial |
| Expansion card standard | PCIe 1.1 |

### Other features

| Feature | Value |
|---|---|
| Quantity | 1 |
| Manual | Yes |

### Weight & dimensions

| Feature | Value |
|---|---|
| Weight | 0.044 kg |
| Package weight | 112 g |
| Height | 150 mm |
| Width | 67 mm |
| Depth | 98 mm |

### System requirements

| Feature | Value |
|---|---|
| Windows operating systems supported | Windows 7 x64, Windows 7 Professional, Windows 7 Professional x64, Windows 7 Home Premium x64, Windows 7 Starter, Windows 7 Starter x64, Windows 7 Ultimate, Windows 7 Ultimate x64, Windows 11, Windows 7 Home Premium, Windows 7 Home Basic x64, Windows 7 Home Basic, Windows 7 Enterprise x64, Windows 7 Enterprise, Windows 7, Windows 11 x64, Windows 10 Home, Windows 8.1 Pro, Windows 8.1 x64, Windows 8.1 Pro x64, Windows 8, 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 10 Pro x64, Windows 10 x64, Windows 10, Windows 10 Education, Windows 10 Education x64, Windows 10 Enterprise, Windows 10 Enterprise x64, Windows 10 Home x64, Windows 10 IOT Core, Windows 10 IoT Enterprise, Windows 10 Pro |
| 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

| Feature | Value |
|---|---|
| Internal | Yes |
| Product colour | Green |

### Performance

| Feature | Value |
|---|---|
| Mean time between failures (MTBF) | 277385 h |
| Chipset | Asix AX99100 |

### Logistics data

| Feature | Value |
|---|---|
| Master (outer) case height | 315 mm |
| Master (outer) case width | 360 mm |
| Master (outer) case length | 685 mm |
| Products per master (outer) case | 75 pc(s) |
| Harmonized System (HS) code | 84733020 |

### Features

| Feature | Value |
|---|---|
| Flow control support | Yes |
| Baud rate | 921.4 Kbit/s |
| Data bits | 5, 6, 7, 8, 9 |
| Stop bits | 1.5, 2, 1 |
| Parity bit | Even, Space, Odd, N, Mark |
| Flow Control type | XON/XOFF, RTS/CTS, N |
| FIFO (First In, First Out) | 256 |

### Packaging data

| Feature | Value |
|---|---|
| Package depth | 170 mm |
| Package height | 30 mm |
| Package width | 142 mm |
| Mounting brackets included | Yes |

## FAQ

### How much does the 1-port PCI Express RS232 Serial Adapter Card StarTech PEX1S953LP cost, and is it available for purchase?

The price is 61.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 116 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: 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. More information about warranty service: https://aio.lv/en/warranty

### 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 1-port PCI Express RS232 Serial Adapter Card StarTech PEX1S953LP?

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.

## Image

https://aio.lv/img/cache/product/2093708/65748744_large.webp