LLS & PIR in area

Discussion in 'C-Bus Wired Hardware' started by brodsky, Oct 10, 2008.

  1. brodsky

    brodsky

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    Hi guys,

    I'm busy with an installation where I want to use a 5031PE light level sensor and PIR in the same area to do some daylight harvesting.

    The scenario; LLS takes care of maintaining lux level as set, and PIR detects occupancy.

    The question; If there is no movement for let's say 30 minutes & PIR is set to switch off GA, will the LLS switch the lightback on again or do I have to use logic to override the LLS until the PIR detects occupancy again?
    This is an office environment.

    I can test this on a bench but it would help if someone has the answer already.

    Thanks
    Brodsky
     
    brodsky, Oct 10, 2008
    #1
  2. brodsky

    Newman

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    If the PIR turns the group address off then the LL Sensor will turn it back on again, as it tries to maintain the target light level.

    What I would do is configure the PIR to control 2 Group Addresses and make the second group address disable the LL Sensor when the PIR turns the Groups off and re-enable it when the PIR turns the Groups on again.
     
    Newman, Oct 13, 2008
    #2
  3. brodsky

    brodsky

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    Thanks Newman,

    It makes perfect sense.
    Will do that.

    Brodsky
     
    brodsky, Oct 13, 2008
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