Help with Multifunction Timing Relay

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Steven Rupp

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Chicago, IL
I have a customer that has gates at their property. When the button is depressed to operate the gates the lights on the outside of the building must go on for 15 minutes. I understand how to operate the relay using a push button, but the control circuit will be a 110 supply for a duration of less than a second. I'm pretty sure this is a Off-Delay NOTO situation, but don't understand how to operate the relay using the control circuit I have.
 
This is my favorite time delay relay. You would set it up as a "single shot". The relay contact will close as soon as the push button is operated and the contact will remain closed for what ever time you set the relay for. With this set up the time delay will be what ever you set it for no matter how many times the button if pushed. If you push the button near the end of the time delay you will not have the full 15 minutes. If you need the 15 minutes from the last time the button is pushed you would set it up as a "retriggerable single shot". With this realy the time delay can be set from 0.1 seconds to 1705 hours.
Don
 
Smart $ said:
You're probably going to need another relay, general purpose, energized with the gate pushbutton and the pushbutton circuit of the TDR connected across the NO contacts of the GP relay...
Click to expand...

As there may be many points of control to operate that gate I would probably 'tap' the motor / actuator feed with a GP relay to operate the TDR contacts.

I might add a photo cell to keep the light off in the daylight.
 
iwire said:
As there may be many points of control to operate that gate I would probably 'tap' the motor / actuator feed with a GP relay to operate the TDR contacts.

I might add a photo cell to keep the light off in the daylight.
Click to expand...

Thanks for the help. I had a feeling I would have to do this. I also like the photo cell idea.
 
iwire said:
As there may be many points of control to operate that gate I would probably 'tap' the motor / actuator feed with a GP relay to operate the TDR contacts.

I might add a photo cell to keep the light off in the daylight.
Click to expand...
Just guessing, as I've never been involved with gate operators... There's probably a contactor or two in the controller, and latch circuits on them to hold them in during the travel times of the gate. Latch circuits are probably broke with limits or sensors. The latch circuits probably keep 120V on the non-powered side of the open/close pushbuttons while the gate is in motion. Tapping any point with 120V while gate opens, neutral otherwise, will do. Might even be room to put the CR in the controller enclosure.

Good point re: photo cell.
 
The last one I bought was about $65. I only buy the 11 pin version because it can do 22 timing functions and the 8 pin version can only do 9 functions. It is the only one that I use because that way I only have to stock one relay. it can do any timing function that you can think of.
Don
 
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