4-Channel 12V Relay Board Module

Power

• Operating Voltage: The relay board operates on a 12V DC power supply.
• Current Consumption:  around 70mA to 100mA for the entire board when all relays are activated, depending on the specific model and load.

Input and Output

• Input:
  • Control Signals: The relay inputs (IN1, IN2, IN3, IN4) receive low-voltage control signals (5V DC) from a microcontroller or other control system.
• Output:
  • Relay Contacts: The relay contacts (COM, NO, NC) switch high-voltage or high-current loads based on the control signals.
  • Load Control: Provides the ability to control various high-power devices such as lights, motors, or appliances.

Physical Characteristics

• Board Dimensions:  around 100mm x 60mm, compact enough to fit in most control panels or enclosures.
• Mounting: Includes mounting holes for secure attachment to a panel or enclosure.
• Relays: Each relay is a standard electromechanical relay with pins for easy connection.
• LED Indicators: Includes small LEDs next to each relay to indicate the operational status (ON or OFF).

Technical Specifications

• Relay Type: Electromechanical relays with NO and NC contacts.
• Isolation: Electrical isolation between control circuits and relay outputs to ensure safety.
• Switching Capacity:
  • AC Load: 250V AC, 10A maximum per relay.
  • DC Load: 30V DC, 10A maximum per relay.
• Control Signal Voltage: Designed to be controlled by 5V DC signals from a microcontroller.
• Response Time: Relay switching time is  in the range of milliseconds.

Additional Features

• Optocouplers: Some models include optocouplers for better isolation and reliability.
• LED Indicators: Provides visual feedback on the status of each relay channel.
• Compatible with Microcontrollers: Easily integrates with microcontrollers like Arduino, Raspberry Pi, and others that provide 5V control signals.
• Safety Features: Includes fuses or other protective components in some models to prevent damage from overcurrent or short circuits.

How to Use

• Connect the Power Supply:
  • Connect the VCC pin to a 12V DC power supply.
  • Connect the GND pin to the ground of the power supply.
• Wiring the Control Inputs:
  • Connect the control input pins (IN1, IN2, IN3, IN4) to the digital output pins of a microcontroller or control system.
• Attach the Load:
  • Connect your load device to the NO or NC terminal of the relay, depending on your desired switching configuration.
  • Ensure the load connections are properly insulated and secure to prevent electrical hazards.
• Upload Control Code:
  • Write and upload a control program to your microcontroller to manage the relay states based on your application needs.
  • The program should include logic to turn relays on and off by sending appropriate signals to the IN pins.
• Testing:
  • Power up the relay board and verify that each relay operates correctly when controlled by the microcontroller.
  • Check the LED indicators to confirm that relays are switching states as expected.

The 4-Channel 12V Relay Board Module provides an effective solution for controlling multiple high-power devices with a low-voltage control signal. Its high load capacity, ease of use, and integration with microcontrollers make it suitable for a wide range of automation and control applications.