Unit 4Relay

SKU:U097

Description

Unit 4Relay is a Unit integrated with 4 relays, controlled via I2C. The relay control voltage is up to AC 250V / DC 28V, with a rated current of 10A and an instantaneous current capacity of 16A. Each relay can be controlled independently, and each relay has a programmable status indicator light.

Features

4 relays
AC 250V@10A/DC 28V@10A
Status indicator light
I2C communication

Includes

1 x Unit 4Relay
1 x HY2.0-4P Grove connection cable (20cm)
4 x VH3.96-4P terminals

Applications

DC signal switching
Power on/off for digital devices

Specifications

Specification	Parameter
MCU	STM32F030F4P6
Max Input Voltage	AC 250V / DC 28V
Rated Current	10A
Max Instantaneous Current	16A
Communication Interface	I2C @0x26
Product Size	112.0 x 23.0 x 18.0mm
Product Weight	40.0g
Package Size	163.0 x 100.0 x 20.0mm
Gross Weight	84.0g

Schematics

Unit 4Relay Schematics PDF

1/1

PinMap

Unit 4Relay

HY2.0-4P	Black	Red	Yellow	White
PORT.A	GND	5V	SDA	SCL

Model Size

Softwares

Arduino

UiFlow1

Unit 4Relay UiFlow1 Docs

UiFlow2

Unit 4Relay UiFlow2 Docs

Protocol

Protocol Type: I2C
I2C Address: 0x26

Mode control Reg 0x10

Bit	Desc	R/W
7	R	R/W
6	R	R/W
5	R	R/W
4	R	R/W
3	R	R/W
2	R	R/W
1	R	R/W
0	LED Sync Mode 0:Manual 1:Auto	R/W

Working Mode Explanation

Manual: LED lights support independent control
Auto: LED follows Relay status changes, lights up when Relay is ON, turns off when OFF.

RELAY control Reg 0x11

Bit	Desc	R/W
7	LED1 / 1: ON 0:OFF	R/W
6	LED2 / 1: ON 0:OFF	R/W
5	LED3 / 1: ON 0:OFF	R/W
4	LED4 / 1: ON 0:OFF	R/W
3	RELAY1 / 1: ON 0:OFF	R/W
2	RELAY2 / 1: ON 0:OFF	R/W
1	RELAY3 / 1: ON 0:OFF	R/W
0	RELAY4 / 1: ON 0:OFF	R/W

EasyLoader

Easyloader	Download Link	Remarks
Unit 4Relay Example with M5Core	download	A key switches relay number, B key switches LED sync/async, C key controls all relays

Video

Unit 4Relay Test with M5Core

UiFlow2 Unit 4Relay