RE: Comfort an Homevision inputs

["Dan Hoehnen" <dhoehnen@xxxxxxx>]

I have HV and Comfort in my house and will address at least part of the
power supply issue.  One of the main design criteria for my system is that
all systems should be independent.  That way, if one is not operational,
all
other systems still function normally.  Thus, I bought a separate 12 volt
power supply that is used for all 12 volt devices that are not security
system related (indoor PIR's, relays, etc.).  Thus, the status of Comfort
will not affect the indoor PIR's going to HV, for example.

Since I am a software developer, I am constantly changing my hardware
around
and may be without a system for a day or two.  Your needs may vary,
however.

The EOL resistor is usually not needed, but used to make a zone more
secure.
With it, the security system is able to detect both a short and an open in
the circuit.  This makes detecting faults better and it is harder for a
would-be intruder to bypass a sensor with a piece of wire.  Personally, I
don't use them on my indoor PIR's used for non-security applications.

There is a project just getting started to provide a new program for
programming Comfort.  It should allow for If/Then type programming with
English commands instead of numbers, so will be much easier to setup a
Comfort system once it is available.  Due to be a 4 month development
project if I remember right.

Dan

> I am just about to embark on wiring my new house for homevision
> and comfort
> and I have a query for those of you who have done this already.
> My problem
> is that I want to use the a mixture of inputs from homevision and
comfort
> for my PIR's and door contacts to do both my motion sensing for
automated
> lights and security system. Seeing as homevision does not have
> 9/12v dc to
> power my PIR's I will have to use the 12v outputs which comfort
> provides to
> power the PIR's. I reckon altogether I will have 24 separate inputs
> available (16 from hv and 8 from comfort) to mix and match. I
> think I will
> need about 13 PIR's first of all, and six door contacts.. Can I power
all
> of these PIR's from comfort ? While I can only use 8 inputs to
comfort, I
> could still use the power from comfort to supply the other 5
> PIR's ? Or is
> there a limit to the load on the 12v outputs from Comfort limiting the
> number of PIR's I can power. What I am trying to do is avoid having to
> purchase additional power supplies for this.
>
>   Secondly, can I common outputs from a single PIR to both comfort and
> homevision ?. Ideally, I would like to have door contacts wired
> to comfort
> for the security aspect of things, but it may be better to wire these
to
> hv, as they do not require power. Any ideas or advice on how anyone
mixed
> and matched these would be appreciated.
>
>  Finally, what is the idea of having a resistor on the end of
> contacts for
> PIR's etc, I thought a simple N/O N/C contact would be all that was
> required. Also, having been spoilt by homevision, anyone have any
> suggestions on good guides to programming comfort, the manuals are
pretty
> unfriendly, or maybe my mind is just getting lazy?
>
> Thanks,
>
> Eamon
>
>
>
>
>
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