Description
Product Overview
The StarTech PEX2S553LP is a single‑chip PCI Express serial card that adds a high‑speed RS232 port to any compatible desktop. Measuring 3.15 x 4.13 x 3.15 inches and weighing just 2.24 oz, it fits easily into standard slots. Data transfer rates reach up to 460.8 Kbps, and the card supports selectable power output on pin 9, allowing flexible integration with a range of devices. It ships with a half‑height low‑profile mounting bracket and an optional standard‑profile bracket for versatile installation.
Usage
Designed for industrial automation, networking equipment, point‑of‑sale systems, and legacy hardware, this card provides dependable serial communication in demanding environments. Whether you are connecting barcode scanners, CNC machines, or medical instruments, the PEX2S553LP delivers consistent performance. Its low‑profile form factor makes it suitable for space‑constrained cases often found in rack‑mount servers and compact workstations.

Why Choose Us
StarTech is known for engineering quality components that meet rigorous standards. The PEX2S553LP’s native single‑chip architecture reduces latency and improves reliability compared to multi‑chip solutions. Each unit undergoes thorough testing to ensure compliance with industry specifications, and the product is backed by a manufacturer warranty, giving you confidence in long‑term operation.
Key Features
- High‑speed RS232 port with up to 460.8 Kbps data rate
- Single‑chip PCI Express design for optimal speed and stability
- Selectable power output on pin 9 for flexible device compatibility
- Includes low‑profile and standard‑profile mounting brackets
- Compact dimensions and lightweight construction for space‑constrained builds
FAQ
What operating systems are supported?
The card works with Windows 7, 8, 10, and 11, as well as most Linux distributions that include standard PCI driver support.
Can I use the card in a server rack?
Yes, the low‑profile bracket is designed for 1U and 2U rack‑mount servers, making it ideal for data‑center deployments.
Is the power output configurable?
Pin 9 can be set to provide either 5 V or 12 V, allowing you to match the power requirements of the connected serial device.
Do I need additional drivers?
StarTech provides a driver package for Windows; Linux systems typically use the built‑in generic serial driver.
What is the warranty period?
The product comes with a one‑year limited warranty covering manufacturing defects.





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