The 24V 1-Channel Relay Module is designed for switching AC or DC loads using a low-power control signal. It can be integrated into microcontroller, automation, industrial control, and DIY electronics projects to control lights, appliances, motors, and other electrical devices.

The module features a Songle relay, LED status indication, screw terminals for convenient wiring, and support for high-level or low-level triggering.

An isolation slot separates the control and relay load areas of the PCB, helping provide physical separation between the low-voltage control circuitry and the switched load section.

Key Features

• Relay Channels: 1
• Module Supply Voltage: 24 V DC
• Genuine Songle relay
• Supports high-level and low-level trigger configurations
• Can switch AC or DC loads within the relay's rated specifications
• Relay status LED indicator
• Power indicator LED
• Normally Open (NO) contact
• Normally Closed (NC) contact
• Common (COM) terminal
• Screw terminals for convenient load wiring
• Jumper-configurable relay/control supply arrangement
• PCB isolation slot between control and load areas
• Compact module design
• Suitable for automation and microcontroller projects

Module Interface

• DC+ – Positive DC power supply
• DC- – Negative DC power supply / ground
• IN – Relay trigger signal input
• JD+ – Positive relay-coil/control supply
• JD- – Negative relay-coil/control supply

When DC+ and JD+ and DC- and JD- are connected using the supplied jumper configuration, the trigger/control side and relay side share the same power source.

Relay Output Terminals

The relay provides three standard switching contacts:

• COM (Common): Common relay connection
• NO (Normally Open): Disconnected from COM when the relay is inactive and connected when the relay is activated
• NC (Normally Closed): Connected to COM when the relay is inactive and disconnected when the relay is activated

This allows the module to be used for applications that require either normally-on or normally-off operation.

High/Low-Level Trigger

Depending on the module configuration, the relay can be activated using a HIGH or LOW input signal.

• High-Level Trigger: The relay activates when the IN terminal receives the required HIGH-level control signal.
• Low-Level Trigger: The relay activates when the IN terminal is pulled LOW relative to ground.

This flexibility makes the module suitable for integration with different controllers and control circuits.

LED Indicators

The onboard LEDs provide quick visual indication of module operation:

• Power Indicator: Shows that the module is powered
• Relay Status Indicator: Shows when the relay has been activated

Technical Specifications

• Module Type: Single-channel relay module
• Supply Voltage: 24 V DC
• Relay Brand: Songle
• Number of Channels: 1
• Trigger: High/Low-level configurable
• Output: NO / NC / COM relay contacts
• Load Type: AC or DC within relay contact ratings
• Module Dimensions: Approx. 50 × 33 × 24 mm
• Connection Type: Screw terminal and pin input
• Status Indication: LED

Typical Applications

• Home automation
• Lighting control
• Industrial automation
• Motor and pump switching
• Solenoid control
• Appliance control
• Alarm systems
• Remote switching systems
• PLC and controller projects
• Arduino and microcontroller projects
• DIY electronics

Important Safety Note

When switching 220V AC or other mains voltages, proper electrical insulation, enclosure, wiring practices, fusing, and safety precautions are required. Do not touch the relay load terminals or PCB while mains power is connected.

Always operate the relay within the voltage and current ratings printed on the installed relay.