RainbowLink 4 Channel USB to Serial Converter (RS485 / RS232 / TTL)

The RainbowLink is an all-in-one USB protocol converter featuring four independent communication channels (RS485, RS232, and two 3.3V TTL) alongside simultaneous triple voltage outputs. Designed for engineers, makers, and educators, it streamlines multi-protocol debugging and sensor testing across industrial, IoT, and laboratory setups without needing separate adapters or external power supplies.

Four independent serial channels

Consolidate your workstation with dedicated RS485, RS232, and dual 3.3V TTL interfaces housed within a single compact unit. Each channel operates independently, allowing simultaneous communication, monitoring, and control of diverse serial devices.

Tool-free lever quick-connect terminals

Lever-type quick-connect terminals allow rapid, secure wiring without requiring screwdrivers or specialised crimp connectors. Rated for over 2,000 connect-disconnect cycles, the terminals securely accommodate standard pin headers and bare wire leads.

Simultaneous triple power outputs

Power target sensors and peripheral boards directly using integrated 12V (800mA), 5V (up to 2A from host Type-C), and 3.3V (200mA) output rails. This built-in power delivery removes the clutter of external power packs, making field diagnostics and prototyping much simpler.

Broad platform compatibility

The converter offers driver-free plug-and-play capability on Windows and Linux systems, with direct compatibility for single-board computers like Raspberry Pi and LattePanda. Optional driver installation enables persistent unique device identifiers for advanced hardware management.

Versatile field and bench debugging

With a baud rate range of 2,400 to 128,000 bps and a 72mm by 47mm footprint, the unit easily handles industrial RS485 sensor diagnostics, multi-protocol IoT integration, and laboratory testing.

Downloads & documentation

• Product wiki (DFRobot)