Re: Dual-connecting PIR's?

["Frank Mc Alinden" <armagh@xxxxxxx>]

Hi Paul
               
Not familiar with the comfort panel but  i think you may be
able to...
Most alarm circuit inputs have one side connected to  ground and the
other
side connected to +v via eol (end of line) resistors....If this is the
case
with comfort then i would suggest the following..
    If you connect the each alarm input circuit ground
connection to the
common connection on the pir then when the pir detects movement it will
switch the ground onto the normally open contact which i would suggest
you
connect to the input Of Ian Birds relay board (designed to mount in
comfort
i believe) and use the dry contacts to trigger the ocelet......Im
assuming
Ians opto isolated board is neg switching on the input
side..........You
would need to use a spare core for the n/o contact...

Hope this makes sense

Frank
----- Original Message -----
From: "Paul Gordon" <paul_gordon@xxxxxxx>
To: <ukha_d@xxxxxxx>
Cc: <Comfort-technical@xxxxxxx>
Sent: Monday, January 20, 2003 9:07 PM
Subject: [ukha_d] Dual-connecting PIR's?


> Chaps,
>
> It it feasible to connect the SAME PIR to two controllers?
>
> I currently have PIR's all over the house, connected to Comfort. I
have
> Homeseer & Patricks Comfort plugin passing the PIR triggers into
Homeseer.
I
> also have the Homeseer Ocelot plugin passing the same triggers into
the
> Ocelot...
>
> The multiple hops to get the PIR triggers into the Ocelot introduces
too
> much delay for my liking, and is also rather too dependent on too
many
> software components as well... I'd like to bypass all that and connect
the
> PIR's directly to inputs on the Ocelot using a couple of spare cores
in
each
> PIR cable..
>
> I was thinking that I'd only connect the N.O. contacts to Ocelot
inputs.. -
> Comfort Supplies 12V to each PIR on one pair of cores, and has the
zone
> contacts on another pair.
>
> However, if I connect the N.O contacts to the Ocelot, would I then
be
> coupling the Ocelot and Comfort electrically? - do I need to ensure
that
the
> isolation  - perhaps a diode in the additional pair back to the
Ocelot?
>
> Also, Comfort has all it's PIR's set up in DEOL mode, will tapping
onto
the
> N.O. contacts affect the resistance and upset Comfort?
>
> As you might notice, electronics is not my forte!! - so please keep
any
> answers nice and simple!
>
> Many thanks.
>
> Paul G.
>
>
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