StarTech 4‑Port PCIe Serial Card Profile 921Kbps

Description

Product Overview

The StarTech 4‑Port PCI Express RS232 Serial Adapter Card (model PEX4S953LP) delivers robust serial connectivity for modern desktops and servers. Built around the ASIX AX99100 chipset, each of the four DB9 ports supports bi‑directional communication at speeds up to 921.6Kbps, with a 256‑byte FIFO buffer to ensure smooth data flow. The card features a low‑profile bracket pre‑installed, plus a standard bracket for versatile mounting, and offers optional configurable power (12 V, 5 V, or none) through pin 9, delivering up to 2 A total across the ports. Designed for Windows (XP and later) and Linux environments, it measures 2.48 × 2.95 × 0.71 inches and weighs just 9.3 oz, making it an unobtrusive yet powerful addition to any system.

Usage

This serial card excels in point‑of‑sale terminals, industrial PLCs, factory automation, scientific sensors, medical devices, and test equipment such as oscilloscopes. Its configurable power and low‑profile form factor allow seamless integration into cramped server racks or compact workstations. Whether you are connecting barcode scanners, RFID readers, or legacy instrumentation, the card provides reliable, high‑speed serial links that meet the demanding data rates of modern applications.

Why Choose Us

StarTech is renowned for engineering quality components that combine durability with performance. This adapter undergoes rigorous testing for signal integrity and electromagnetic compatibility, ensuring consistent operation in noisy industrial settings. The inclusion of a breakout cable (DB44 to 4 × DB9) simplifies wiring, while the optional power configuration reduces the need for external supplies, streamlining system design and maintenance.

Key Features

• Four independent RS232 ports with 921.6Kbps per port and 256‑byte FIFO buffers
• Configurable power options (12 V, 5 V, or none) delivering up to 2 A total
• Low‑profile bracket pre‑installed; standard bracket included for flexibility
• Compatible with Windows XP‑to‑10 and major Linux distributions
• Includes DB44 to 4 × DB9 breakout cable for quick deployment

FAQ

Can the card be used in a standard desktop tower?

Yes, the card includes a standard bracket in addition to the low‑profile bracket, allowing installation in both low‑profile and full‑height cases.

What operating systems are supported?

The card works with Windows XP, Vista, 7, 8, 10 and later, as well as major Linux distributions that support PCIe devices.

How is power supplied to the serial ports?

Power can be configured per port via pin 9 to provide 12 V, 5 V, or no power, with a combined maximum of 2 A across all ports.

Is a driver required for Linux?

The ASIX AX99100 chipset is supported by the built‑in Linux kernel driver, so no additional driver installation is typically necessary.

What is the warranty period?

StarTech offers a limited 3‑year warranty covering defects in materials and workmanship.