Lighting Control

Discussion in 'The Projects Forum' started by RRS, Feb 12, 2014.

  1. RRS

    Thread Starter New Member

    Feb 12, 2014
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    0
    New to this site and although I searched for an answer, I apologize if one is here as I could not find an answer.

    I have an Intermatic ET90115CE programmable timer for parking lot lights control. I have been searching for a timer that I can use for shutting down the lights earlier than the scheduled time.

    The signal or relay would need to be a 1/2 - 1 second on or closed contact pulse, then return to an off or open contact state. This would allow the ET90115CE to resume it's normal programmed schedule.

    What I would like to do is have a circuit that when activated gives me a preset time of approximately 10-30 minutes to get to my vehicle before the lights go off.

    The reason for wanting this is the lights are set to go off each night at 10:30PM, but once in a while we might leave earlier than the time scheduled. Thus saving us a good amount on our electricity usage.

    Any help or suggestions would be appreciated.
     
  2. inwo

    Well-Known Member

    Nov 7, 2013
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    Nobody?

    As usual, I'm confused.

    You want the timer you have to work as-is?

    Plus:
    Have a button to push that turns lights on for ** seconds overriding timer?

    Then what is the "1/2 - 1 second on or closed contact pulse"?:confused:

    And this "
    earlier than the scheduled time"? Can't you reprogram?
     
  3. RRS

    Thread Starter New Member

    Feb 12, 2014
    3
    0
    Sorry for the confusion, and thanks for the reply.

    I would like the timer to work as it is programmed to do.

    The control box of the timer has a manual override button (momentary), press once and it will turn lights off, press again and it will turn lights on. This is where I would connect a relay.

    Ideally, a single momentary switch that when pressed would activate a timer that after 10-15 minutes or so would send a pulse signal to a relay. The reason I mentioned 1/2 to 1 second was because if the manual override momentary button is pressed and not released the switch will not work until it is released.

    The ET90115CE is in the basement and I want to mount this switch upstairs next to the security panel. That way we can set the security alarm then press the button for the lights to turn off after a delay, giving someone time to walk to their car before the lights go off.

    Oh, and the ET90115 cannot be programmed to do this function.
     
  4. inwo

    Well-Known Member

    Nov 7, 2013
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    You want to connect a relay contact across the override button that when activated, would "pulse it", then 30 minutes later pulse it again?
     
  5. RRS

    Thread Starter New Member

    Feb 12, 2014
    3
    0
    I would like the relay to pulse the override button contacts 10-20 minutes after the switch by the door is pressed.
     
  6. inwo

    Well-Known Member

    Nov 7, 2013
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    What would start the process?

    The button is pressed.
    The light timer is overridden.
    The new timer starts.
    After "time" button contacts are pulsed. = (override ended)

    Hows that?

    Can the switch by the door be changed? Important!
    What is available to power timer?
    120vac at the switch? At the timer?
     
    Last edited: Feb 12, 2014
  7. inwo

    Well-Known Member

    Nov 7, 2013
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    No matter what your answer, I haven't come up with a simple solution.:(

    It's going to be a smart timer.

    Like suggested on post two here.http://forum.allaboutcircuits.com/showthread.php?t=94501

    If it were me:
    I would add a 30 minute spring timer and a heavy enough relay, to either power the light circuit directly, or pull in the lighting contactors, by paralleling the existing control circuit, from intermatic timer.
     
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