home alarm systems?

not agood idea to fit sound bomb because of drain on panel current supply
instead fit 16 ohn speaker which will give setting tones
and will give full volume in alarm
most panels will power two speakers from the audio output
as regards pir and contacts wire them in series that is
whichever colour you use to alarm terminals use same colour from second alarm terminal of first detector to the second detector then back to panel with second wire colour of your choice
on the pir it would be a good idea to fit a pir with a latch
facility
the latch is powered from the set positive terminal on control panel and when a detector is triggered if the detector is showing a red light this is the detector that triggered the panel if no light is showing then it is door contacts that have triggered the alarm

mal
December 2010