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4-Channel Isolated USB to Serial Converter with RS485, RS232 and Dual TTL Interfaces for Industrial Debugging and Communication with Built-in 12V Power Supply
The RainbowLink V2 4-Channel Isolated USB to Serial Converter is a compact, all-in-one communication tool designed for engineers, developers, and field technicians working with diverse serial protocols. It integrates four independent channels including isolated RS485 and RS232 along with dual TTL interfaces, eliminating the need for multiple adapters and simplifying debugging workflows. With built-in isolation, the device ensures safe and stable communication in industrial environments by protecting connected systems from voltage spikes and ground loops.
Designed as a portable debugging workstation, the RainbowLink V2 also features integrated multi-voltage power outputs (12V, 5V, and 3.3V), enabling direct powering of external modules without additional adapters. Its rugged and space-efficient design makes it ideal for IoT development, embedded systems, industrial automation, and field diagnostics. Whether interfacing with PLCs, sensors, or microcontrollers, this converter provides reliable, multi-protocol communication in a single device.
Key Features
- 4 Independent Channels: RS485 (Isolated), RS232 (Isolated), and 2xTTL interfaces
- Built-in Electrical Isolation: Protects against noise, surges, and ground loops
- Multi-Protocol Support: Compatible with industrial and embedded communication standards
- Integrated Power Outputs: Provides 12V, 5V, and 3.3V supply for external devices
- USB Interface: Easy connection to PC for debugging and data communication
- Compact Design: Pocket-sized solution for portable use
- Rugged Construction: Suitable for industrial and field environments
- All-in-One Tool: Eliminates need for multiple converters and adapters
Integrated Portable Power Supply
Enables field testing of 12V industrial sensors. RainbowLink V2, unlike typical converters that merely carry data, has a built-in boost converter. The gadget transforms the USB 5V input to 12V (800mA), 5V (2A), and 3.3V (200mA) outputs.
Application: Water level sensors, soil meters, and PLCs are powered and debugged directly from a laptop USB connection, eliminating the need for an extra bench power supply or wall outlet.
Four Channels, Simultaneous Operation
Replaces four separate USB dongles with one robust device. All channels operate independently:
- Channel 1: RS485 (Fully Isolated) – For industrial PLCs and long-distance sensors.
- Channel 2: RS232 (Fully Isolated) – For legacy hardware and standard serial devices.
- Channel 3 & 4: TTL (UART) – For microcontrollers, GPS modules, and sensors.
Figure: Four Channels of RainbowLink V2
Industrial-Grade Protection (V2 Upgrade)
Prevents damage to connected computing equipment. The V2 edition features Full Signal & Power Isolation for the RS485 and RS232 interfaces. This critical feature blocks high-voltage surges, ground loops, and electrical noise, ensuring computers and prototypes remain safe during harsh industrial debugging.
Comparsion Table: Generic USB Converter VS RainbowLink V1 VS RainbowLink V2
Enhanced Usability and Design
Smart Port Naming: The dedicated driver explicitly names the ports in Device Manager (for example, "RainbowLink RS485"), allowing you to identify the correct COM port without guesswork.
Tool-Free Wiring: Equipped with high-quality lever-type spring terminals. Allows for quick connections by simply flipping the lever, inserting the wire (12-22AWG), and snapping it shut.
Applications
- Outdoor Sensor Testing: Debugging 12V RS485 soil sensors with just a laptop.
- Industrial Maintenance: It safely connecting to high-voltage PLCs using separated RS232.
- R&D Prototyping: Observing data from both an ESP32 (TTL) and a GPS module (TTL) simultaneously.
Package Content:
- RainbowLink V2 4 Channel USB to Serial Converter x1
