With ON-delay operation, the Timer receives an input and then an output signal is output by switching the Timer contacts after a set time delay. This name is used because there is a delay between when the input signal is received (i.e., turns ON) and when the output signal is output.

What is on delay and off delay timer?

After the input is turned on there is a delay before the output is turned on. After the input is turned off there is a delay before the output is turned off.

How does on delay and off delay timer work?

Operation of On Delay/True Off Delay Function

Upon application of input voltage, the time delay (t1) begins. At the end of the time delay (t1), the output is energized. When the input voltage is removed, the output remains energized for the time delay (t2). At the end of the time delay (t2), the output is de-energized.