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Posted by petem on July 12, 2005, 10:36 pm
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if the panel loose a keypad it wil react with a trouble condition to the
central
if you remove power to the keypad(red wire) it will not react anymore...
the keypad become active after power up in a few second max...
and the trouble clear right away..
thats what i seen with any ademco/first alert panel that have keypad with
adress on the bus
Tu2dnVacibjQtk7fRVn-uA@giganews.com...
> What is the expected behavior of any Ademco keypad if you put a relay on
> one
> wire of the connection between the keypad and a 128BP panel and leave the
> relay disconnected? Does the keypad simply go dead, or does it display
> an
> error? If the relay is connected, how long will it take the keypad to
> sync
> up and be ready for use? Is there any potential harm to the panel itself
> if this relay is in use a few times a day?
>
> The idea we had was to install such a relay to the keypad and use our door
> access card system as a way to activate the keypad. The user comes in
> and
> presents his badge, which connects the relay and activates the keypad for
> maybe five minutes. The user then can use his access code to turn the
> alarm system off or on.
>
> The reason we want something like this is that the access codes have a way
> of becoming known over time by too wide an audience of people. Having a
> way to secure the keypad with both a physical token, as well as a unique
> user code, makes it all the harder for someone to do something trivial
> like
> just steal a code they happen to see someone use on the panel.
>
> --
> Will
> Internet: westes AT earthbroadcast.com
>
>
>
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