Hello, I am new to this forum so I would like to say HI .
My current circuit consists of 3 24VDC relays that control 3 pumps. I want to add a timer safety circuit which checks to see if the pumps are on for an hour.
If the pumps are on continiously for an hour, the timer circuit should switch off the relays until the reset button is pressed.
I found this:
http://www.reuk.co.uk/Timer-Circuits-With-4060B.htm
but it energies the relay after the timer has pulsed . I wish to do the opposite and switch off the relay when the timer has pulsed and also reset the timer when the pump has switched off in normal operation.
I don't know if that makes sense but any help would be greatly appreciated.
My current circuit consists of 3 24VDC relays that control 3 pumps. I want to add a timer safety circuit which checks to see if the pumps are on for an hour.
If the pumps are on continiously for an hour, the timer circuit should switch off the relays until the reset button is pressed.
I found this:
http://www.reuk.co.uk/Timer-Circuits-With-4060B.htm
but it energies the relay after the timer has pulsed . I wish to do the opposite and switch off the relay when the timer has pulsed and also reset the timer when the pump has switched off in normal operation.
I don't know if that makes sense but any help would be greatly appreciated.