M5Stack Single-phase AC SSR Unit (CDG1-1DA-10A)

The M5Stack Unit ACSSR is a DC to AC single phase solid state relay controller kit that comes with a single phase solid state relay + ESP32C3 controller board. It supports key control, I2C slave and Modbus networking modes of operation. It also features an integrated programmable full-colour RGB LED for state indication.

This kit is contactless and adopts semiconductor switching elements. It has several advantages such as high switching speed, extremely long life, low switching noise, no switching spark and is much more reliable than most mechanical relays.

Widely used in digital program control devices, motor control devices, temperature control, data processing systems and computer peripheral interface devices. It is specially designed for harsh environments with corrosion, humidity or explosion-proof requirements and frequent turn-on/off requirements.

Features

• Single-phase solid-state relay
• Three operating modes.
  • Push button control
  • I2C slave (support device I2C address configuration)
  • Modbus networking (supports device ID configuration)
• Programmable full-colour RGB LED
• RS485PWR interface (support input 9-24V to power the device)

Package Contents

• 1x Single Phase Solid State Relay
• 1x UNIT ACSSR
• 2x 3.96 4-pin Terminal Blocks
• 1x HY2.0 4-pin Cable (20cm)
• 1x Communication protocol manual

Specifications

Main Controller	ESP32C3
Programmable RGB LED	SK6812
Load Current	10A
Input Control Voltage	3-32VDC
Load Voltage	24~480VAC
Input Control Current	5mA~20mA
Breakdown Leakage Current	≤5mA
On-state Buck	≤1.6V
Operating current safety series	resistive load: 50% Inductive load: 50%
Electrical lifetime	≥1 million times
Indicator Light	Red
Net Weight	112.6g
Gross Weight	137.8g
Product Size	80 * 45 * 31mm
Package Size	147 * 90 * 40mm

Resources

• Product Wiki
• Communication protocol
• Arduino Example:
  • M5Unit-ACSSR I2C Relay Control
  • M5Unit-ACSSR I2C addr Config
  • M5Unit-ACSSR Modbus Relay Control
  • M5Unit-ACSSR Modbus Slave ID Config
• Libraries:
  • ArduinoModbus
  • Arduino485
  • M5Unit-ACSSR

Pinout

M5Core (PORT A)	GPIO22	GPIO21	5V	GND
UNIT ACSSR	SCL	SDA	5V	GND
ESP32-C3 (internal)	GPIO0	GPIO1	GPIO2	GPIO3	GPIO4	GPIO5	GPIO6
UNIT ACSSR	SCL	SDA	RGB LED	BTN	RELAY CTL	RS485-TX	RS485-RX