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Unit 2Relay

SKU:U131

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Description

Unit 2Relay is a dual-channel relay-controlled high-voltage driver unit. It integrates two normally open (NO) mechanical relays, which are directly controlled via GPIO logic levels, supporting AC 250V / DC 28V high-voltage switching with a rated current of 8A per channel. The unit communicates through a Grove HY2.0-4P interface, features physical isolation and status indicator LEDs, and adopts a LEGO-compatible mounting hole design, enabling flexible integration with LEGO structures or screw mounting. It is suitable for smart home applications, appliance control, and safe power management in industrial equipment scenarios.

Features

  • Channel Count: 2 independently controlled relay channels
  • Load Capacity: AC 250V@8A or DC 28V@8A
  • Status Indication: Independent LED indicator for each channel
  • Control Method: Direct GPIO logic-level drive
  • Communication Interface: Grove HY2.0-4P
  • 2 x LEGO-compatible mounting holes
  • Development Platform
    • UiFlow1
    • UiFlow2
    • Arduino IDE

Includes

  • 1 x Unit 2Relay
  • 1 x HY2.0-4P Grove connection cable (20cm)
  • 2 x HT3.96-4P terminals

Applications

  • AC/DC signal switching
  • Power on/off for digital devices

Specifications

Specification Parameter
Max Switching Voltage AC 250V / DC 28V
Rated Current 8A
Coil Control Voltage DC 5V
Coil Power Consumption 5V@154mA
Coil Action Time ≤ 8ms
Coil Release Time ≤ 5ms
Contact Form Normally Open (NO)
Contact Material AgSnO2
Relay Indicator Light Blue x2
Product Size 56.0 x 24.0 x 19.0mm
Product Weight 20.0g
Package Size 138.0 x 93.0 x 17.0mm
Gross Weight 31.2g

Learn

This relay is driven by IO output high/low level signals, so before connecting to the main controller, ensure that the connected port IO supports configuration as output mode. (Note: ESP32's G36 does not allow configuration as output mode, so PORT.B will not be able to drive properly)

Schematics

PinMap

Unit 2Relay

HY2.0-4P Black Red Yellow White
PORT.A GND 5V RELAY-2 RELAY-1

Model Size

Structure

Softwares

Arduino

UiFlow1

UiFlow2