Waveshare RP2350-Relay-6CH is a Raspberry Pi RP2350-based industrial 6-channel relay module with an isolated RS485 interface, 7 to 36V DC input via a terminal block, and support for Raspberry Pi Pico HATs.
Each relay is isolated and can handle 250VAC/30VDC up to 10A, a USB-C port is used for firmware updates, and the module also includes a buzzer, a few LEDs, as well as Reset and BOOT buttons, with everything housed in a DIN-Rail enclosure.
- Microcontroller – Raspberry Pi RP2350B
- CPU
- Dual-core Arm Cortex-M33 @ 150 MHz with Arm Trustzone, Secure boot OR
- Dual-core RISC-V Hazard3 @ 150 MHz
- Either two cores can be used.
- Memory – 520 KB on-chip SRAM
- Package – QFN-80
- CPU
- Relay – 6x relays
- Contact rating – ≤10A 250VAC/30VDC
- Contact form – 1NO 1NC via screw terminals
- Optocoupler isolation
- USB – USB Type-C port for power, data, and firmware flashing
- Serial
- Isolated RS485 via screw terminal for Modbus industrial modules or sensors
- Hardware automatic control, TVS diode, surge protection & ESD protection, reserved 120R matching resistor, NC by default, enabled via jumper
- Expansion
- 2x 20-pin headers for Raspberry Pi Pico HATs for additional functions such as RTC, CAN Bus, RS232, LoRa, sensor, etc…
- 8x pads with GPIO, UART, I2C, SPI
- Misc
- Reset and BOOT buttons
- User RGB LED
- Power LED, Tx/Rx LEDs
- Buzzer
- Power Supply
- 5V via USB-C port
- 7 to 36V DC via terminal block
- Dimensions – 145 x 90 x 40mm (Rail-mount ABS protective case)
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Waveshare mentions support for C/C++, MicroPython, and Arduino, and provides basic instructions to get started with either, and demo code to control the six relays over RS485, test the RGB LED, and interface with a range of expansion modules, namely Modbus RTU relay, Pico-2CH-RS485, Pico-CAN-B, Pico-Environment-Sensor, and PicoRTC-DS3231.
The module lacks network connectivity, but if WiFi is needed, Waveshare previously designed the ESP32-S3-Relay-6CH based on ESP32-S3 WiFi 4 and Bluetooth 5.x SoC and otherwise the same features and mechanical design for just $2 more.
The RP2350-Relay-6CH module can be purchased on AliExpress for $32.50, Amazon for $38.99, or directly on the Waveshare’s online store for $26.99. A screwdriver is provided as part of the kit to loosen and tighten the terminal screws.
Jean-Luc started CNX Software in 2010 as a part-time endeavor, before quitting his job as a software engineering manager, and starting to write daily news, and reviews full time later in 2011.
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