StarTech.com ICUSB422 USB-A FM to DB-9 1.8m RS422/485 Adapter

Struggling to link legacy RS-422/485 equipment to a modern PC? The StarTech.com ICUSB422 USB-A FM to DB-9 1.8 m RS422/485 Adapter converts a USB-A port into a DB-9 serial connection, letting you communicate with industrial devices without hunting for a spare serial card. It’s a plug-and-play solution that saves desk space and eliminates extra power bricks.

Benefits of StarTech.com USB Adapter

You gain instant connectivity without installing complex drivers, while the COM-port retention means the adapter remembers its settings after each unplug, giving you peace of mind on every reconnection. Its USB-powered design removes the need for an external supply, keeping your workspace tidy. The robust 6 ft cable provides flexibility for cramped setups, and the two-year warranty backed by lifetime technical support ensures long-term reliability.

Key Features of a 1.8 m USB Adapter

• Connector 1: DB9 M. A standard male DB-9 lets you attach directly to RS-422/485 devices.
• Connector 2: USB-A FM. Fits any modern computer’s USB-A port for easy plug-in.
• Cable length: 1.8 m. Gives you enough reach to route around desks or racks.
• Networking / Ports: RS-422/485. Supports both serial protocols for versatile use.
• Networking / Data Transfer Rate: 921.6Kbps. Handles fast data streams reliably.
• Networking / Interface (Bus) Type: USB. Works with any USB-compatible system.
• Networking / Features: USB powered. No extra power adapter required.
• COM Port Retention: Settings saved. Reconnect without re-configuring the COM port.
• Dipswitch controls: Easy port configuration. Adjust settings quickly on the device.
• Warranty: 2-year limited. Backed by StarTech.com’s free lifetime technical support.

Usages of a 1.8 m USB Adapter

You can integrate this adapter into everyday workflows such as:

• Connecting legacy industrial sensors to a laptop for field diagnostics.
• Linking a barcode scanner to a point-of-sale PC without opening the case.
• Attaching a serial console to a network switch for quick configuration.
• Extending a RS-485 bus in a small server room where space is limited.
• Providing a reliable serial link for laboratory equipment that only offers DB-9 output.

StarTech.com USB Adapter

Many buyers worry that a USB-to-serial converter will need special drivers or will lose settings each time it’s unplugged. Others fear the adapter will be bulky or require an extra power source. These concerns often lead to hesitation and unnecessary purchases of larger, more complex solutions.

The StarTech.com ICUSB422 USB-A FM to DB-9 1.8 m RS422/485 Adapter removes those doubts. It works with a wide range of operating systems-from Windows 98 to macOS 13-without demanding extra software, and its COM-port retention remembers your configuration automatically. The USB-powered, 6 ft cable design keeps your desk clean while delivering the reliability you need for critical serial communications.

Specifications