RainbowLink 4-channel USB to Serial Converter RS485/RS232/TTL

The RainbowLink from DFRobot connects four serial devices to a computer at the same time: one channel each of RS485 and RS232 and two TTL channels with 3.3 V. The channels work independently and appear on the computer as separate COM ports. In addition, the converter supplies 3.3 V, 5 V and 12 V for the connected sensors, so a separate power supply is often not needed. Connections are made with lever terminals without tools; according to DFRobot they last over 2000 mating cycles and accept stranded wire, solid wire and pin headers.

Note: The 5 V come directly from the USB-C port: up to 2 A at a computer's USB-C port, up to 500 mA at a USB-A port. The channels are not connected to each other; RS485 and TTL1, for example, cannot communicate directly with each other. With the optional driver, the ports appear as A, B, C and D as on the housing; without the driver, a channel LED shows when sending which port belongs to which COM.

Features:

• Four independent channels: 1× RS485, 1× RS232, 2× TTL 3.3 V
• Outputs 3.3 V (200 mA), 5 V and 12 V (800 mA) simultaneously
• Lever terminals without tools, over 2000 mating cycles
• Data LEDs per channel
• Outputs with short-circuit and overcurrent protection
• Driver-free on most computers, Windows and Linux
• Suitable for LattePanda and Raspberry Pi

Application Examples:

• Testing and debugging industrial sensors, for example RS485 with Modbus
• Development of devices with several interfaces
• Debugging development boards in the lab
• Field tests of sensors in agriculture

Documentation:

• Wiki DFRobot TEL0185
• Driver (ZIP)

Technical Data:

• Manufacturer: DFRobot
• Manufacturer SKU: TEL0185
• USB connector: USB-C
• Input voltage: 5 V
• Baud rate: 2400 to 128,000 bit/s
• TTL level: 3.3 V
• Channels: 2× TTL, 1× RS485, 1× RS232
• Output 3.3 V: 200 mA
• Output 5 V: directly from the USB-C port, up to 2 A at a computer's USB-C port, up to 500 mA at USB-A
• Output 12 V: 800 mA
• Operating systems: Windows, Linux, suitable for LattePanda and Raspberry Pi
• Driver: not needed for basic functions, optional for unique port names
• Dimensions: 72 × 47 × 23 mm
• Weight: 58 g

Scope of Delivery:

• 1× RainbowLink 4-channel USB to serial converter (RS485, RS232, TTL)