Re: Stitch two glass breaks together?

["Crash Gordon" <webmaster@xxxxxxxxxxxxxxxxxxxxx>]

Depends on the acoustic glassbreak, some  have to face the window, some
pickup in 360 degree pattern.

Yes you can series the relays (NOT the power) of glassbreaks, you won't know
which one tripped though unless they have a selectable latching jumper -
this is only important if you have falsing problems and need to know which
of the two is falsing.

I'm not that familiar with Napco panels but if the keypad power is the same
as the aux power terminals in the panel, you could run your glassbreaks off
of the keypad in the kitchen and the zone(s) off the keypad expansion loops
as well. (this should be verified with one of the Napco guys here first).

Two wire glassbreaks...usually piezo's or have small batteries in them and
have to attach to the glass...ie...they don't have the coverage that a
acoustic would.


"Total nerd" <geekboy0001@xxxxxxxxx> wrote in message
news:1129592689.594004.188460@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
|I have a kitchen with big casement Anderson's in two areas -- one on
| the West wall and one on the North wall.  I understand you need to
| "point" a glass break acoustic sensor at the window, correct?  That
| means I need two, one pointing North and one pointing West.  I also
| have an English keypad with a 4-zone expander built into it next to the
| kitchen door.  Can I get two 2-wire acoustic sensors and daisy chain
| them together like magnetic sensors, or does it not work like that?
| And, can they be hooked into the zone expander in the napco keypad, or
| do they need to be plugged into the panel?
| On a related question -- how important is the acoustic sensor to be
| poiting exactly at the window in question?  I have another room with a
| row of windows long enough to take up the whole 25' wall.  If I point a
| sensor directly at the wall, it will only really "point" to two of
| them.  If, however, I mount it on the same wall as the motion sensor,
| it will "look down" the room, flanking all the windows.  Will it still
| work properly?  Is it just a microphone and pointing it at a window is
| not as impotant as it seems?
| thanks
|