How to Use Trigger Delay Relay 6-30V: Examples, Pinouts, and Specs

The Trigger Delay Relay 6-30V is a versatile electronic component designed to activate a relay after a user-defined delay when triggered. Operating within a voltage range of 6 to 30 volts, this relay module is ideal for timing applications in various circuits. It is commonly used in automation systems, DIY electronics projects, and industrial control systems where precise timing is required.

• Automation Systems: Delayed activation of motors, lights, or other devices.
• DIY Electronics Projects: Creating timed circuits for hobbyist applications.
• Industrial Control: Sequential activation of machinery or processes.
• Security Systems: Delayed triggering of alarms or locks.
• Home Automation: Timed control of appliances or lighting systems.

Below are the key technical details and pin configurations for the Trigger Delay Relay 6-30V module:

1. Power the Module: Connect the VCC pin to a DC power source (6V to 30V) and the GND pin to ground.
2. Set the Delay Time: Use the onboard potentiometer or buttons (if available) to adjust the delay time. Refer to the module's markings or manual for specific adjustment instructions.
3. Connect the Trigger Input: Attach the IN pin to a trigger signal source (e.g., a microcontroller, switch, or sensor). Ensure the trigger voltage is within the range of 3.3V to 24V DC.
4. Connect the Load: Wire the load to the relay output pins (NO, NC, and COM) based on your desired configuration:
   • Use NO and COM for a circuit that activates after the delay.
   • Use NC and COM for a circuit that deactivates after the delay.
5. Test the Circuit: Apply the trigger signal and observe the relay's behavior. The relay will activate after the specified delay.

• Voltage Compatibility: Ensure the power supply voltage is within the 6V to 30V range to avoid damage to the module.
• Trigger Signal: Verify that the trigger signal voltage is between 3.3V and 24V DC.
• Load Ratings: Do not exceed the relay's maximum load current (10A @ 250V AC or 10A @ 30V DC).
• Isolation: Use optocouplers or other isolation techniques if the relay is connected to high-voltage circuits.
• Debouncing: If using a mechanical switch as the trigger, consider adding a debounce circuit to prevent false triggering.

Below is an example of how to use the Trigger Delay Relay 6-30V with an Arduino UNO to control a light after a delay:

// Example: Trigger Delay Relay with Arduino UNO
// This code triggers the relay after a 5-second delay when a button is pressed.

const int triggerPin = 7;  // Pin connected to the relay's IN pin
const int buttonPin = 2;   // Pin connected to the button
int buttonState = 0;       // Variable to store the button state

void setup() {
  pinMode(triggerPin, OUTPUT);  // Set the relay pin as an output
  pinMode(buttonPin, INPUT_PULLUP);  // Set the button pin as an input with pull-up
  digitalWrite(triggerPin, LOW);  // Ensure the relay is off initially
}

void loop() {
  buttonState = digitalRead(buttonPin);  // Read the button state

  if (buttonState == LOW) {  // Check if the button is pressed
    delay(5000);  // Wait for 5 seconds (delay time)
    digitalWrite(triggerPin, HIGH);  // Activate the relay
    delay(1000);  // Keep the relay on for 1 second
    digitalWrite(triggerPin, LOW);  // Deactivate the relay
  }
}

1. Relay Does Not Activate

   • Cause: Insufficient power supply voltage or current.
   • Solution: Verify that the power supply provides 6V to 30V DC and sufficient current.

2. Incorrect Delay Time

   • Cause: Misconfigured delay settings.
   • Solution: Adjust the potentiometer or buttons to set the correct delay time.

3. Trigger Signal Not Detected

   • Cause: Trigger voltage is outside the acceptable range.
   • Solution: Ensure the trigger signal voltage is between 3.3V and 24V DC.

4. Load Not Functioning Properly

   • Cause: Incorrect wiring of the relay output pins.
   • Solution: Double-check the connections to the NO, NC, and COM pins.

Q: Can I use this relay with an AC load?
A: Yes, the relay supports AC loads up to 250V at 10A. Ensure proper isolation and safety precautions.

Q: How do I reset the delay time?
A: Adjust the onboard potentiometer or buttons to reset the delay time. Refer to the module's manual for detailed instructions.

Q: Can I use this relay with a Raspberry Pi?
A: Yes, the relay can be triggered by a Raspberry Pi GPIO pin. Use a 3.3V logic level for the trigger input.

Q: Is the relay suitable for inductive loads?
A: Yes, but it is recommended to use a flyback diode or snubber circuit to protect the relay from voltage spikes.