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intruder alarm switchin off lights
#1
OFF TOPIC! PLEASE FORGIVE ME!

I've been asked to look at using intruder alarms (galaxy panels) to switch off lights on sites when the alarm is set to save energy and money. Has anyone got any experience of this I could steal 'piggyback' from? I presume you use a RIO as an output to turn off the lights via a mains voltage relay? Does anyone know of a relay with an override facility if the intruder alarm fails or during testing etc? Any specific recommendations or products to avoid?

I'm also possibly looking at timed sensors to turn off other lights after 'x' minutes e.g. single lights where a intruder relay is not cost efficient. Can these just be used to replace existing light switches? With adjustable timers inside? Does anyone have any experience of these or products they can recommend?

Any help is appreciated!
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#2
Hi Alonso

To knock out all the lights when setting the alarm the lighting circuits would need to go through a bank of relays, normally located at the main distribution board. It would then act exactly the same as a 'Last man out switch' (LMO). Also the circuits need to be wired in such a way that the supply to any emergency lighting is maintained throughout. As you can imagine this could involve quite a bit of additional work depending on how the lights are currently wired. You may as well just have an LMO installed adjacent to the alarm keypad and forget about interconnecting.
If the site is mainly offices it may be worth considering putting motion sensors in each room and corridors and link out the ordinary switches.
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#3
If the intruder alarm system wasn't set (someone forgot, or a fault prevented setting) could a potential intruder work this out because the lighting was still on?
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#4
(14-08-2019, 04:59 PM)rtfm Wrote: If the intruder alarm system wasn't set (someone forgot, or a fault prevented setting) could a potential intruder work this out because the lighting was still on?

Yep. If they knew about it.
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#5
This setup is very common now in supermarkets, especially convenience stores. Micklou has mentioned the important considerations - but yes essentially just an automated LMO switch

Also has some positive security considerations, lights go on when alarm triggers means easy identification of the building and great CCTV footage not relying on IR
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#6
(15-08-2019, 12:58 AM)YCarlos Wrote: This setup is very common now in supermarkets, especially convenience stores. Micklou has mentioned the important considerations - but yes essentially just an automated LMO switch

Also has some positive security considerations, lights go on when alarm triggers means easy identification of the building and great CCTV footage not relying on IR
Didn’t think of that. Good point
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