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Posted by JoeRaisin on May 1, 2006, 9:28 pm
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The reversing relay changes the polarity of the power causing all smokes
to sound. I know that for the 2WTA-B we use an RRS-Mod since that smoke
gets its coded sound from the relay.
We don't install too many 4wires but I think one relay would do it.
As far as using the smokes as an aux... there needs to a definite
difference in sound between a fire alarm and a burglar alarm since, in
the middle of the night, the two events require quite different responses.
You wouldn't want your 13 year old daughter climbing out her window
during a burglary only to come face to face with a desperate perp trying
to make an escape - likewise, you wouldn't want her hiding in her closet
during a fire.
Stanley Barthfarkle wrote:
> I'm assuming the reversing relay is for interconnecting the sounders, in
> which case you'll need 6 conductors at each detector rather than 4. As far
> as conductor size, with 18 interconnected sounders, you should consult with
> the manufacturer for the wire size required for your total wire length and
> number of detectors. 18 guage fire rated wire is spec for the detectors- I
> don't know what is spec for your sounders. You're on the right track with
> EOL resistors and power supervision modules at each detector.
>
> For what it's worth, if you could find Multiplex addressable detectors
> (instead of 4-wire) that work with your system, it would be SO much easier
> to configure and install, and probably cheaper. That way, you retain the
> ability to know exactly which smoke tripped, but eliminate a great deal of
> extra home-run wiring, relays, zone expanders, and power supv modules, and
> probably the need to physically interconnect the sounders. Multiplex wiring
> is a wonderful thing for any large alarm installation, for both fire and
> burg devices.
>
> No, you shouldn't use the smoke sounders as aux signaling devices- use your
> smoke sounders as they are intended- fire alarm only. For a house that big,
> I would use an supervised Aux power supply, triggered from the alarm panel
> output, driving 1 or 2 "talking" siren drivers, which in turn drive 2 to 4
> siren-speakers each in appropriate places throughout the home.
>
> Here's a link to a good "talking" siren driver-
>
http://cgi.ebay.com/NIB-Ademco-745-Talking-Voice-Siren-Driver-all-alarms_W0QQitemZ6039383704QQcategoryZ41969QQssPageNameZWD1VQQrdZ1QQcmdZViewItem
>
> And some siren-speakers-
>
http://cgi.ebay.com/New-in-box-Ademco-746-Siren-Speaker-Surface-Mount_W0QQitemZ6011821000QQcategoryZ41969QQtcZphotoQQcmdZViewItem
> OR
>
http://cgi.ebay.com/NIB-Aritech-Moose-MPI-35f-siren-speaker-flush-mount_W0QQitemZ6040903009QQcategoryZ20589QQtcZphotoQQcmdZViewItem
>
>
>
>
>
>>I'm getting ready to wire my smokes and I'm not clear on how to get
>>them all to sound when one goes off. Here's what I'm planning; please
>>help me understand how to hook up the reversing relay. (Note model
>>numbers in parenthesis are System Sensor)
>>
>>18 System Sensor i3 series 4-wire smoke detectors with sounders
>>(4WTA-B) each on a separate zone connected to a OmniProII panel. Each
>>smoke will require its own EOL relay (EOLR-1).
>>
>>As I read the manuals, it appears that I'll need a reversing relay
>>(RRS-MOD) for each zone, for a total of 18. Is that correct? How do
>>the reversing relays get chained together? Or should these connect to
>>the alarm output? For that matter, can the smoke alarms be used as an
>>auxillary alarm for a break-in or is that a no-no?
>>
>>Thanks!
>>
>
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