How to Use Wireless Relay 12v 4Ch: Examples, Pinouts, and Specs

The WenQia Wireless Relay 12V 4Ch is a versatile and robust relay module designed for remote control of multiple devices or circuits. Operating at 12 volts, this module features four independent channels, making it ideal for applications that require the control of multiple devices simultaneously. Common use cases include home automation, industrial control systems, and remote switching applications.

1. Power Supply Connection:

   • Connect the VCC pin to a 12V DC power supply.
   • Connect the GND pin to the ground of the power supply.

2. Control Signal Inputs:

   • Connect the IN1, IN2, IN3, and IN4 pins to the control signals from a microcontroller or other control device.

3. Relay Outputs:

   • Connect the devices or circuits to be controlled to the NO (Normally Open), COM (Common), and NC (Normally Closed) contacts of each relay.

• Ensure that the power supply voltage is stable and within the specified range (12V DC).
• Avoid exceeding the maximum load current and voltage ratings for each relay channel.
• Use proper isolation techniques when controlling high voltage or high current loads.
• Keep the wireless receiver and antenna away from sources of interference to maintain reliable communication.

/*
 * Example code to control the WenQia Wireless Relay 12V 4Ch using Arduino UNO.
 * This code demonstrates how to turn on and off each relay channel.
 */

const int relay1 = 2; // Control pin for Relay 1
const int relay2 = 3; // Control pin for Relay 2
const int relay3 = 4; // Control pin for Relay 3
const int relay4 = 5; // Control pin for Relay 4

void setup() {
  // Initialize the relay control pins as outputs
  pinMode(relay1, OUTPUT);
  pinMode(relay2, OUTPUT);
  pinMode(relay3, OUTPUT);
  pinMode(relay4, OUTPUT);
}

void loop() {
  // Turn on Relay 1
  digitalWrite(relay1, HIGH);
  delay(1000); // Wait for 1 second

  // Turn off Relay 1
  digitalWrite(relay1, LOW);
  delay(1000); // Wait for 1 second

  // Turn on Relay 2
  digitalWrite(relay2, HIGH);
  delay(1000); // Wait for 1 second

  // Turn off Relay 2
  digitalWrite(relay2, LOW);
  delay(1000); // Wait for 1 second

  // Turn on Relay 3
  digitalWrite(relay3, HIGH);
  delay(1000); // Wait for 1 second

  // Turn off Relay 3
  digitalWrite(relay3, LOW);
  delay(1000); // Wait for 1 second

  // Turn on Relay 4
  digitalWrite(relay4, HIGH);
  delay(1000); // Wait for 1 second

  // Turn off Relay 4
  digitalWrite(relay4, LOW);
  delay(1000); // Wait for 1 second
}

1. Relay Not Activating:

   • Ensure that the control signal voltage is within the required range.
   • Check the power supply voltage and connections.

2. Intermittent Operation:

   • Verify that the wireless receiver is not experiencing interference.
   • Ensure that the control signals are stable and not fluctuating.

3. Overheating:

   • Ensure that the load current does not exceed the maximum rating.
   • Provide adequate ventilation and cooling for high-power applications.

• Check Connections: Ensure all connections are secure and correctly wired.
• Verify Power Supply: Use a stable and adequate power supply to avoid voltage drops.
• Use Proper Isolation: For high voltage or high current loads, use proper isolation techniques to protect the relay module and control device.
• Test with Simple Loads: Start by testing the relay module with simple loads (e.g., LEDs) before connecting more complex devices.

By following these guidelines and best practices, users can effectively utilize the WenQia Wireless Relay 12V 4Ch in their projects and applications.