Description M5Stack Unit 2Relay is a compact dual-channel relay unit built for direct GPIO-controlled high-voltage switching. As a reliable SPST relay module, it integrates two normally open mechanical relays and supports AC 250V or DC 28V switching at up to 8A per channel. That makes M5Stack Unit 2Relay a practical choice for smart home power control, appliance switching, and industrial equipment switching where isolated load control matters. Features Unit 2Relay provides two independently controlled outputs in one dual-channel relay unit. This SPST relay module supports direct GPIO logic-level drive through the Grove HY2.0-4P interface. Each channel supports AC 250V@8A or DC 28V@8A switching for practical high-load control. Independent status LEDs make relay activity easy to monitor during smart home power control and bench testing. The compact enclosure and mounting holes make it suitable for industrial equipment switching, appliance control, and embedded automation. Specifications Product M5Stack Unit 2Relay Relay Type Normally Open mechanical relay Channel Count 2 Max Switching Voltage AC 250V / DC 28V Rated Current 8A per channel Coil Control Voltage DC 5V Coil Power Consumption 5V@154mA Control Method GPIO logic-level drive via Grove HY2.0-4P Product Size 56.0 x 24.0 x 19.0mm Applications M5Stack Unit 2Relay works well anywhere a dependable dual-channel relay unit is needed for isolated switching. Typical uses include smart home power control, AC/DC signal switching, remote appliance toggling, lab automation, and industrial equipment switching. Because it behaves as a direct-drive SPST relay module, it is also useful for controller projects that need straightforward load switching without adding a separate relay board. Product List 1 x Unit 2Relay 1 x HY2.0-4P Grove connection cable (20cm) 2 x HT3.96-4P terminals Other Content The official size drawing and schematic are useful when confirming wiring, enclosure spacing, or terminal layout before integration. Resources M5Stack Unit 2Relay Official Docs Unit 2Relay Structure Files M5Unit-RELAY Library and Examples Unit 2Relay UIFlow Docs UiFlow2 FAQ What kind of relay does this module use?It is a dual-channel relay unit with two normally open outputs, making it a straightforward SPST relay module for controller projects. What is it best used for?M5Stack Unit 2Relay is best for smart home power control, appliance switching, and industrial equipment switching where isolated GPIO-driven load control is needed.
