1. ATTENTION returning members. If you are coming here from the old forum for the first time, you will need to reset you password. However, we had an email problem getting password reset links set out to a lot of the email addresses. That problem is temporarily rectified but IF you still have an issue, email me direct at info@thebuildingcodeforum.com and I will give you a temporary password.
    Dismiss Notice
  2. Welcome to the new and improved Building Code Forum. We appreciate you being here and hope that you are getting the information that you need concerning all codes of the building trades. This is a free forum to the public due to the generosity of the Sawhorses, Corporate Supporters and Supporters who have upgraded their accounts. If you would like to have improved access to the forum please upgrade to Sawhorse by clicking here: Upgrades
    Dismiss Notice

Motion sensor on alarm panel

Discussion in 'Residential Electrical Codes' started by Gordon H., May 12, 2018.

  1. Gordon H.

    Gordon H. Registered User

    Joined:
    Mar 11, 2018
    Messages:
    18
    Likes Received:
    1
    I'm installing a Honeywell motion sensor on a DSC alarm panel.
    Should the sensor's power be wired to a constant 12V source on the panel or one that turns on only when the alarm system is activated at the keypad?
    Thanks!
     
  2. cda

    cda Sawhorse

    Joined:
    Oct 19, 2009
    Messages:
    14,755
    Likes Received:
    847
    Any manufacture instructions??


    Seems like you only need power when the system is active???
     
  3. cda

    cda Sawhorse

    Joined:
    Oct 19, 2009
    Messages:
    14,755
    Likes Received:
    847
    Call dsc and ask??
     
  4. Gordon H.

    Gordon H. Registered User

    Joined:
    Mar 11, 2018
    Messages:
    18
    Likes Received:
    1
    The instructions only state using a 12V source.
    My thoughts are the unit should only be powered up when it is needed (i.e. when the alarm is armed at the panel) and powering the motion sensor from a constant source could reduce the life of the sensor, however I have also read that these sensors go through a 'power up sequence' - that might create a fault on the alarm system if the unit is only powered up when the system gets armed at the panel.
    I'd ask DSC but I don't have 3 or 4 days to wait for a response.
     
  5. cda

    cda Sawhorse

    Joined:
    Oct 19, 2009
    Messages:
    14,755
    Likes Received:
    847
    Well do what I would do

    A bench test run

    Hook it up to the panel activate the panel see if you get a fault

    If you do than power it constantly

    I am thinking powering it just upon panel activation should work.
     
  6. Msradell

    Msradell Sawhorse

    Joined:
    Jul 23, 2011
    Messages:
    759
    Likes Received:
    60
    In the very assistance I've had motion detectors always have had constant power, not power that turns off when the system isn't armed. It probably doesn't make a whole lot different unless there's a startup sequence as mentioned earlier but I've never had one fail that was left on constantly. Many electronic devices get more stress by being turned on and off than they do by being left on constantly.
     

Share This Page