StarTech USB to Serial RS232 Adapter with COM Retention

StarTech.com ICUSB2321F | USB to Serial RS232 Adapter

The StarTech.com 1 Port FTDI USB to Serial RS232 Adapter Cable with COM Retention is designed for UK engineers and technicians. It adds a reliable RS232 DB9 port to modern laptops or desktops via USB. The key USP is automatic COM port retention, which reassigns the same port value after disconnection or a system reboot. It uses the FTDI FT232RL chipset for broad compatibility.

StarTech.com 1 Port FTDI USB to Serial RS232 Adapter Cable with COM Retention

This adapter converts an available USB 1.1 or 2.0 port into an RS232 serial DB9 port. It supports connection, monitoring, and control of serial equipment. Because it uses the FTDI chipset, it offers advanced features and customisation not always found in alternative solutions. In practice, this makes it a dependable choice for mixed OS environments.

Slim Technical Overview

Automatic COM Port Retention

The adapter features COM retention. If you disconnect and reconnect the cable, or reboot the host computer, the same COM port value is automatically reassigned. This prevents configuration errors when working with serial devices. It saves time during field service or lab testing.

FTDI Chipset Advantage

It uses the FTDI FT232RL chipset. This supports additional customisation and advanced features compared to generic solutions. The chipset is widely recognised for stability and driver support. For example, it helps ensure reliable data transfer across different operating systems.

Broad OS Compatibility

Compatible operating systems include Windows CE (4.2, 5.0, 6.0), XP Embedded, 98SE, 2000, XP, Vista, 7, 8, 8.1, 10, 11, and Windows Server 2003 to 2019. macOS 10.6 to 10.15, 11.0, 12.0, 13.0 are supported. Linux Kernel 3.0.x is also listed. However, always verify the latest driver version for your specific OS build.

Compact Form Factor

The adapter measures 41.5 mm (W) x 45 mm (D) x 22 mm (H) and weighs 90 g. Its short 0.2 m cable reduces clutter on a desk or workbench. This makes it suitable for mobile use with laptops. The black finish is discreet for professional environments.

Operational Durability

Operating temperature range is 0 °C to 55 °C. Storage temperature is -20 °C to 85 °C. Relative humidity tolerance is 5% to 95%. These specifications suggest suitability for typical UK indoor conditions. However, confirm suitability for any extreme environments.

Package contents

• 1 x StarTech.com USB to Serial RS232 Adapter Cable (ICUSB2321F)
• 1 x Manual
• Drivers included (via download or included media)

Things to check first

• Confirm your device has a free USB 1.1 or 2.0 port.
• Verify your serial device uses a standard DB9 RS232 interface.
• Check your operating system version against the compatibility list.
• Confirm you need a 0.2 m cable length for your setup.

Frequently Asked Questions

Is it worth it?

This adapter is ideal for UK professionals who need a reliable RS232 connection from a modern computer. It suits engineers, lab technicians, and IT support staff working with legacy serial equipment. The COM retention and FTDI chipset provide practical stability. Covered by the applicable manufacturer warranty.