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Bus topology for PIRs etc.
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garym999
Comfort Installers


Joined: Saturday Aug 19th, 2006
Location: United Kingdom
Posts: 196
Status:  Offline
 Posted: Thursday Sep 7th, 2006 05:12 pm
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Comfort can become quite a monster when fully wired with loads of zones, inputs, outputs etc. Also if the upfront planning has not been well thought through can be difficult to expand.

Would it be possible to implement some sort of bus wiring such that one loop of wire around a floor could have all the PIRs etc. Attached to it? I know of a few systems where you insert an ID module in the PIR and the wire via three wires, Power, Data and Ground.

On the back of my previous post for Enviromental interface..."Dallas One Wire" might fit the bill.

slychiu
Administrator


Joined: Saturday Apr 29th, 2006
Location: Singapore
Posts: 1029
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 Posted: Friday Sep 8th, 2006 05:40 am
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Fair comment. A tremendous amount of wires are needed for a large Comfort installation. We intend to look at other alternatives in the future. The ID system implemented by a British alarm manufacturer seems to be a proprietary system

garym999
Comfort Installers


Joined: Saturday Aug 19th, 2006
Location: United Kingdom
Posts: 196
Status:  Offline
 Posted: Friday Sep 8th, 2006 07:33 am
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On that basis 1W may work well globally as they do have chips with a that just 64 bit unique ID embeded in them


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