Tripp Lite 2-Port RS-422/RS-485 USB to Serial FTDI Adapter with COM Retention (USB-B to DB9 F/M)

Overview

The Tripp Lite U208-002-IND is a two-port USB to serial adapter designed to convert a single USB-A connection into two RS-422 or RS-485 serial ports. It enables computers without native serial interfaces to connect with industrial controllers, barcode scanners, modems, GPS receivers, and other legacy devices. With data rates up to 1 Mbps and COM port retention, it ensures reliable and consistent communication in demanding environments.

Key features

• Two independent serial ports configurable for RS-422 or RS-485 via DIP switches, allowing easy hardware setup without software adjustments
• FTDI chipset maintains COM port numbers after reboot or reconnection, preserving software configurations and reducing downtime
• Metal enclosure built to withstand vibration, dust, and temperature variations common in industrial and field settings
• Integrated electrostatic discharge (ESD) protection safeguards connected equipment from electrical surges
• Powered directly from the USB bus, eliminating the need for an external power supply and simplifying installation in tight spaces
• Compatible with Windows, macOS, and Linux, supporting diverse operating systems in mixed-platform environments
• Backward compatible with USB 1.1 hosts, ensuring broad device support
• Includes USB cable and driver disc for immediate setup and use
• Two-year limited warranty provides confidence in long-term reliability

Key specs

• Serial ports: 2 x RS-422/RS-485 (nine-pin DB9 connectors)
• Data rate: up to 1 Mbps
• USB interface: USB-A to USB-B
• COM port retention: yes, via FTDI chipset
• Power: USB bus powered, no external adapter required
• Enclosure: metal housing with ESD protection
• Operating system compatibility: Windows, macOS, Linux
• Dimensions and weight: not specified
• Warranty: two-year limited

Connectivity and compatibility

This adapter connects to a computer through a single USB-A port and provides two serial ports with DB9 connectors, supporting RS-422 and RS-485 protocols. Its broad OS compatibility makes it suitable for various setups, including industrial automation systems, laboratory equipment, and field service laptops. The DIP switches on each port allow users to tailor the serial communication settings to match connected devices without needing additional software tools.

Ideal uses and environments

The robust metal housing and ESD protection make this adapter well suited for industrial and harsh environments where vibration, dust, and temperature fluctuations are common. It fits well in production lines, warehouses, laboratories, and remote monitoring stations. Its ability to maintain COM port assignments ensures stable operation in setups where software configurations must remain consistent across reboots, making it a strong choice for professionals managing legacy serial devices alongside modern computers.