---
product_id: 62604954
title: "StarTech.com 1-port PCI Express RS232 Serial Adapter Card - PCIe RS232 Serial Host Controller Card - PCIe to Serial DB9 - 16550 UART - Low Profile Expansion Card - Windows & Linux (PEX1S553LP)"
brand: "startech"
price: "$168"
currency: NZD
in_stock: false
reviews_count: 9
url: https://www.desertcart.nz/products/62604954-startech-com-1-port-pci-express-rs232-serial-adapter-card
store_origin: NZ
region: New Zealand
---

# 460.8Kbps max speed 1x DB9 RS232 port PCIe low & full profile StarTech.com 1-port PCI Express RS232 Serial Adapter Card - PCIe RS232 Serial Host Controller Card - PCIe to Serial DB9 - 16550 UART - Low Profile Expansion Card - Windows & Linux (PEX1S553LP)

**Brand:** startech
**Price:** $168
**Availability:** ❌ Out of Stock

## Summary

> 🔗 Bridge the old and new with speed and style!

## Quick Answers

- **What is this?** StarTech.com 1-port PCI Express RS232 Serial Adapter Card - PCIe RS232 Serial Host Controller Card - PCIe to Serial DB9 - 16550 UART - Low Profile Expansion Card - Windows & Linux (PEX1S553LP) by startech
- **How much does it cost?** $168 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.nz](https://www.desertcart.nz/products/62604954-startech-com-1-port-pci-express-rs232-serial-adapter-card)

## Best For

- startech enthusiasts

## Why This Product

- Trusted startech brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Flexible Power Options:** Choose 12V, 5V, or no power on pin 9 to perfectly match your device needs.
- • **IT Pro’s Trusted Choice:** Backed by lifetime warranty and 24/5 multilingual tech support for zero downtime.
- • **Blazing Fast Data Transfer:** Experience up to 460.8Kbps with a 256-byte FIFO buffer for smooth, lag-free communication.
- • **Seamless Legacy Connectivity:** Add a high-speed RS232 serial port to your modern PC effortlessly.
- • **Dual Profile Bracket Included:** Install with confidence on both low-profile and standard desktop/server setups.

## Overview

The StarTech.com PEX1S553LP is a single-port PCI Express RS232 serial adapter card featuring a 16550 UART chipset, delivering up to 460.8Kbps data transfer speeds with a 256-byte FIFO buffer. It supports flexible power configurations and comes with both low-profile and full-profile brackets for versatile installation on Windows and Linux systems. Designed for IT professionals, it offers reliable legacy device connectivity backed by lifetime warranty and expert technical support.

## Description

Buy

Review: Solved getting an RS232 interface on a brand new PC - Small format PCIe card providing a cost effective and maximum performance RS232 interface card. Supplied drivers easily installed from CD, no problems but remember to set correct port number (not explained in instructions)
Review: Good Service - thanks for your service plug it in worked first time

## Features

- 1 PORT SERIAL CARD: Serial controller card with 16550 UART based on ASIX MCS9922CV-AA, allows 1x DB9 port with bi-directional RS232 speeds up to 460.8Kbps per port, available 256 byte FIFO buffer; Upgraded version of our popular card PEX1S552LP
- OPTIONAL CONFIGURABLE POWER: PCI Express RS232 serial adapter card provides choice of 12v, 5v, or none through pin 9
- STANDARD PROFILE und LOW PROFILE BRACKET: PCIe serial card comes with a low profile bracket pre-installed und 1x full profile bracket is incl for versatile install; Supports Windows und Linux
- VERSATILE APPLICATIONS: For lowith standard profile desktop/servers with uses in point of sale terminals, PLCs, control/automation in factories, scientific sensors, medical equipment, scanner, oscilloscope
- THE IT PRO'S CHOICE: Designed and built for IT Professionals, this PCIe serial adapter card is backed for life, including free lifetime 24/5 multi-lingual technical assistance

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0041ULUX6 |
| Are Batteries Included | No |
| Best Sellers Rank | 81,782 in Computers & Accessories ( See Top 100 in Computers & Accessories ) 30 in Serial Port Cards |
| Brand | StarTech |
| Colour | Green |
| Customer Reviews | 4.3 4.3 out of 5 stars (105) |
| Date First Available | 16 Nov. 2010 |
| Graphics Card Interface | PCI |
| Guaranteed software updates until | unknown |
| Item Weight | 44 g |
| Item model number | PEX1S553LP |
| Manufacturer | Startech |
| Number of Serial Ports | 1 |
| Operating System | Microsoft |
| Product Dimensions | 8 x 10.5 x 2 cm; 44 g |
| Series | PEX1S553LP |

## Product Details

- **Brand:** StarTech
- **Hardware interface:** PCI
- **Item weight:** 0.04 Kilograms
- **Product dimensions:** 8L x 10.5W x 2H centimetres
- **Style:** Modern

## Images

![StarTech.com 1-port PCI Express RS232 Serial Adapter Card - PCIe RS232 Serial Host Controller Card - PCIe to Serial DB9 - 16550 UART - Low Profile Expansion Card - Windows & Linux (PEX1S553LP) - Image 1](https://m.media-amazon.com/images/I/711ShPqFrgL.jpg)

## Questions & Answers

**Q: suitable for windows 7?**
A: Hi There,Yes this interface was needed to use a new PC with a shop till.  PC is running Windows 7 and works fine.Hope this helps.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Solved getting an RS232 interface on a brand new PC
*by D***K on 4 January 2014*

Small format PCIe card providing a cost effective and maximum performance RS232 interface card. Supplied drivers easily installed from CD, no problems but remember to set correct port number (not explained in instructions)

### ⭐⭐⭐⭐⭐ Good Service
*by D***N on 1 June 2018*

thanks for your service plug it in worked first time

### ⭐⭐⭐⭐⭐ Five Stars
*by D***S on 26 November 2016*

great product swiftly delivered

## Frequently Bought Together

- StarTech.com 1-port PCI Express RS232 Serial Adapter Card - PCIe RS232 Serial Host Controller Card - PCIe to Serial DB9 - 16550 UART - Low Profile Expansion Card - Windows & Linux , TAA (PEX1S553LP)
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- StarTech.com USB C Multiport Adapter - USB-C Travel Dock to 4K HDMI, 3x USB 3.0 Hub, SD/SDHC, GbE, 60W PD 3.0 Pass-Through - Portable USB-C Mini Docking Station USB Type-C/Thunderbolt 3 (DKT30CSDHPD3)

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**Shop now:** [https://www.desertcart.nz/products/62604954-startech-com-1-port-pci-express-rs232-serial-adapter-card](https://www.desertcart.nz/products/62604954-startech-com-1-port-pci-express-rs232-serial-adapter-card)

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*Product available on Desertcart New Zealand*
*Store origin: NZ*
*Last updated: 2026-02-23*