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Green rectangular circuit board with eight black relay blocks, Ethernet port, terminal strips and RP2350 chip visible

WaveShare

WaveShare RP2350 8-Channel Relay Module 2 in 1 accessory

SKU CH-HDZY-MZK37

An 8-channel relay module with RP2350 dual-core microcontroller, 10A 250V AC contacts, RS485 and Ethernet connectivity for industrial control

  • Dual-core RP2350 runs at 150 MHz for flexible control
  • 8 relays rated 10 A 250 V AC or 30 V DC switch heavy loads
  • Isolated RS485 and W5500 Ethernet enable reliable industrial networking
  • 520 KB SRAM plus 16 MB Flash store code and data locally
  • Wide 7–36 V input with rail-mounted ABS case suits harsh environments

Industrial 8-Channel Relay Module

This module is built around the RP2350B microcontroller designed by Raspberry Pi in the UK, featuring dual ARM Cortex-M33 and Hazard3 RISC-V cores clocked up to 150 MHz. It provides 520KB SRAM and 16MB Flash for application code and data logging. The unit targets engineers and integrators who need reliable switching and industrial connectivity in a rail-mounted ABS enclosure.

RS485 and Ethernet Connectivity Limits

The onboard isolated RS485 interface links to Modbus expansion modules or sensors over long cable runs in noisy environments. Network access comes via a W5500 chip providing SPI-based 10/100Mbps Ethernet, so throughput is bounded by the 100 Mbps PHY and the SPI bus. USB 1.1 is available for local configuration but offers only low-speed data transfer.

Switching Capacity and Headroom

Each of the eight relays handles 10A at 250V AC or 30V DC, suitable for typical actuators, heaters and lighting loads. The wide 7-36V supply range and optocoupler-isolated digital inputs protect the logic side from field transients. Builders needing higher current per channel, faster switching cycles or Power-over-Ethernet should look elsewhere.

Highlights

  • Dual-core RP2350 runs at 150 MHz for flexible control
  • 8 relays rated 10 A 250 V AC or 30 V DC switch heavy loads
  • Isolated RS485 and W5500 Ethernet enable reliable industrial networking
  • 520 KB SRAM plus 16 MB Flash store code and data locally
  • Wide 7–36 V input with rail-mounted ABS case suits harsh environments

Specifications

No published specifications for this item yet.

Questions about this item

Should I choose the RP2350 module with 8 relays or a version with fewer channels?

This module provides eight independent relay channels rated at 10A 250V AC or 30V DC each, so select it when you need to switch up to eight separate loads from one controller.

What does the 150 MHz dual-core figure mean when the board is running my automation code?

The RP2350B runs both an ARM Cortex-M33 and a Hazard3 RISC-V core at up to 150 MHz, giving deterministic real-time response for relay sequencing, Modbus polling and Ethernet packet handling without an OS overhead.

How does the onboard RS485 and W5500 Ethernet interface limit my network topology?

The isolated RS485 port supports half-duplex Modbus RTU over two-wire bus up to 1.2 km, while the W5500 provides a single 10/100 Mbps Ethernet link via SPI, so each module occupies one switch port and one RS485 daisy-chain segment.

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