How to Wire ON/OFF Delay Timer for AC & DC Loads – 230V & 24V

Wiring ON and OFF Delay Timer Using AC and DC Supplies – 24VDC & 230V AC

As we have already know the difference between ON Delay and OFF delay timer, to keep things simple despite the comparison between them, we will show how to wire an ON delay timer and OFF delay timer for both AC and DC (230V single phase and 24V DC).

Before delving into the wiring tutorial, let’s understand what ON/OFF delay timers are and where they are used.

An ON delay timer and an OFF delay timer are two types of timers used in various applications. An ON delay timer is designed to introduce a delay before activating a connected appliance or load. It allows for a specified period of time to pass before turning on the load.

This type of timer is commonly used when you need to activate an appliance after a specific time, ensuring that the appliance remains off during the specified delay period.

On the other hand, an OFF delay timer operates in reverse. It activates the load immediately and keeps it on for a predetermined duration. Once the set time elapses, the timer triggers and turns off the load. This type of timer is useful when you want to activate an appliance for a specific period and then automatically shut it down.

Both ON delay and OFF delay timers offer versatile control options, allowing for precise timing operations in various electrical systems and applications.

Components Needed

• MCB – 2-Poles
• RCD – 2-Poles
• ON/OFF Delay Timer – DRV-10
• ON OFF Push button
• Load (Light bulb, Washing Machine etc.)
• 230V Single Phase AC Supply
• 24V DC Supply
• Wires and Cables.

Wiring Diagrams

230V AC:

• Connect the neutral wire from the MCB and RCD to the lamp and A2 terminal of the timer.
• Connect the phase wire to the A1 terminal and common terminal (2) of the timer.
• Connect the phase wire to a normally open (NO) push button and wire it to the trigger (TR) terminal of the timer.

24V DC:

• Connect the neutral wire from the 24VDC supply unit to the lamp and A2 terminal of the timer.
• Connect the phase wire to the A3 terminal and common terminal (2) of the timer.
• Connect the phase wire to a NO push button and wire it to the trigger (TR) terminal of the timer.

ON Delay Timer Setting:

As mentioned on the timer, the ON delay time setting can be managed by rotating the lower ‘X’ knob to the left side (black figures).

To do so, rotate the lower knob on the left side and adjust it to any value in seconds or minutes (e.g., 9.9s, 99s, 9.9m, and 99m).

Suppose you have adjusted the value to 99s; it will show a number on the screen (for example, 0.7).

To increase or decrease the value, simply rotate and adjust the upper knob “t” to the left or right. You can adjust any number (for example, to set it to 10s, rotate the upper knob to the right until the screen shows the number 10). Keep in mind that the maximum value in this range is 99 seconds.

When the time is set for 10 seconds, the trigger indicator will blink, and the timer will start counting down from 10 seconds to lower values until it reaches zero.

When the screen shows “0”, the “RLY” indicator will blink and turn on, indicating that the relay is on and the bulb will start glowing (or any other connected load will be activated) after a delay of 10 seconds.

You can set any value in minutes or seconds for the ON delay timing setting by selecting the lower knob for seconds and minutes and the upper knob for the exact value in numbers. If you want to change the value from minutes to seconds or switch between ON Delay and OFF Delay settings, simply power off the supply and set the different time range and operation accordingly.

OFF Delay Timer Setting:

The process is the same as above, except you have to rotate the lower knob (X) to the right, showing the OFF Delay (aqua or light blue color).

The setting of time and seconds is the same as above for the ON delay time setting, except the operation is reversed.

Suppose you have set the OFF delay time to 20 seconds; both the “RLY” indicator and bulb will be on.

When you press the push button, the bulb will not turn off. Instead, the timer will start counting down from 20 to lower values.

When it reaches 0, the timer will trigger, and the bulb will stop glowing.

Applications:

• When to Use ON Delay Timer:

Use an ON delay timer when you need to activate an appliance after a specific time. The appliance will be off during the specified time.

• When to Use OFF Delay Timer:

Use an OFF delay timer when you need to activate an appliance for a specific time and then shut it down after the specified time.

Related Posts:

• Difference Between ON Delay and OFF Delay Timer
• Auto & Manual Control of 3-Phase Water Pump Motor using Float Switch
• Auto & Manual Control of 1-Phase Water Pump Motor using Float Switch