RE: Newbie questions about PIRs and motion detection

["Kenneth Watt" <kennwatt@xxxxxxx>]

No sorry Dan you got me wrong there, I have no Hawkeyes but I do have
the pet-immune detectors that are hard wired. I never fancied the
wireless stuff much as it's too unreliable for me.

I just use a wall wart set to 12V DC to power up the PIR's and run that
in alarm cable or CAT5 along with the signal wires, works fine.

K.

> -----Original Message-----
> From: Dan Khan (Work) [mailto:dhk@xxxxxxx]
> Sent: 12 January 2002 18:07
> To: ukha_d@xxxxxxx
> Subject: Re: [ukha_d] Newbie questions about PIRs and motion detection
>
> Excellent - Thanks once again for the speedy response.
>
> So, if I understand correctly - you have both Wireless hawkeye sensors
> that
> seem to be okay with (small) pets, and normal hard-wired sensors that
wire
> back to HV.
>
> I don't yet have a HV so am wondering if this is my case for buying
one...
>
> Are your wall warts all plugged in centrally and the power distributed
> from
> them using the alarm cable to each PIR?  How are you distributing your
> power
> to the 8 PIRs and what voltage is the wall wart set to?
>
> Are you suggesting that it is okay to run the 12V along the same piece
of
> CAT5 as the PIR signals?
>
> Thanks for the help.
>
> -Dan
>
> ----- Original Message -----
> From: "Kenneth Watt" <kennwatt@xxxxxxx>
> To: <ukha_d@xxxxxxx>
> Sent: Saturday, January 12, 2002 5:50 PM
> Subject: RE: [ukha_d] Newbie questions about PIRs and motion detection
>
>
> >
> >
> > > -----Original Message-----
> > > From: Dan Khan (Work) [mailto:dhk@xxxxxxx]
> > > Sent: 12 January 2002 17:46
> > > To: ukha_d@xxxxxxx
> > > Subject: [ukha_d] Newbie questions about PIRs and motion
detection
> > >
> > > I am considering putting in some PIRs for motion sensing in
a
> > automation
> > > and
> > > security context.  I am most definitely a PIR and security
thicky.
> > >
> > > I cannot find any pet-immune wireless PIRs such as the MS13e
Hawkeye
> > and
> > > thus may have to consider a hard-wired solution to avoid my
6 cats
> > > triggering false detects.
> > >
> > [Kenneth Watt]
> >
> > I have three of them Dan and they work well with small dogs so
cats
> > should be fine.
> >
> > > I see there is a pet-immune PIR on letsautomate - how are
these
things
> > > normally wired up?  Can I attach a piece of CAT5 from it
back to a
> > central
> > > location, then connect it up to a controller (either alarm,
or
> > homevision,
> > > or similar?).  The PIRs seem to work on DC voltage 9-16V -
how is
the
> > > power
> > > normally routed to the PIR?
> > [Kenneth Watt]
> >
> > Power fed from a wall wart set to 12V DC in my case, then the
relay
of
> > the PIR connected to HV.
> >
> > Does an extra power cable have to be run to
> > > hold the power or can the power and signals be routed down
the
same
> > piece
> > > of
> > > CAT5?
> > [Kenneth Watt]
> >
> > Easier just to use alarm cable, although CAT5 is fine and leaves
you
a
> > pair of wires spare, just in case!
> >
> >
> >   Where would the power come from to power all these PIRs (say I
> > > installed one in each room so prob 13-15 locations)?  Is
there any
way
> > > that
> > > I can trigger an X10 event when the PIR is triggered then
reset?
> > [Kenneth Watt]
> >
> > Very easily. Power can be supplied from a couple of wall warts or
> > suchlike, you could even use a wall wart with a higher amperage
and
> > power them all from one. But, IME, this is not necessary as they
do
not
> > consume a lot of power, I have eight powered at the moment from
one
bog
> > standard wall wart.
> >
> > >
> > > Is it recommended to route all PIR cabling back to a central
box
> > (similar
> > > to
> > > those Krone connecting blocks that James Hoye installed
mentioned
a
> > few
> > > months back) and then connect the central controller to this
using
> > "patch
> > > leads".
> > [Kenneth Watt]
> >
> > IMO, no, I did not find this was needed although it may be
neater.
> >
> > >
> > > Is installing the hard-wired PIRs a DIY job or something a
bit
more
> > > serious...
> > [Kenneth Watt]
> >
> > Doddle! Very easy to hook up to HV, just the cable runs that can
p**s
> > you off ;-)
> >
> > K.
> >
> > HTH
> >
> >
> >
> >
> >
> >
> > For more information: http://www.automatedhome.co.uk
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> >
> >
>
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