Nothing to do with cars question

Deleted account DD · 17-01-2010, 19:56

Hopefully therell be someone on the forum who knows this one

PIR sensors on burglar alarms, are they normally open circuit and close on activation or are they normally closed circuit and open on activation

I need to rplace a couple in our house, its that long since I've had to buy any I cant remember which way round and I know you can get both

17-01-2010, 19:56	#1
Deleted account DD Senior Member Join Date: Sep 2008 Posts: 4,705	Nothing to do with cars question Hopefully therell be someone on the forum who knows this one PIR sensors on burglar alarms, are they normally open circuit and close on activation or are they normally closed circuit and open on activation I need to rplace a couple in our house, its that long since I've had to buy any I cant remember which way round and I know you can get both