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Combined Load on Vista 20P

Subject: Combined Load on Vista 20P
From: "Mike" <reply@xxxxxxxxxxxxxx>
Date: Wed, 6 Apr 2005 06:43:44 -0400
Newsgroups: alt.security.alarms

Wondering if i need to be concerned with running 2 keypads 6150RF and 6160,
one external siren Ademco 748 on a 20P.
I see from the specs here that the alarm output is shown as 2 amps max.
http://www.ademco.com/pdf/Dv20psRE.pdf

It also shows a much lower UL rating whats up with that?
The 2 keypads together draw up to 255mA and the 748 siren draws 1200mA.
Do the keypads run off of the Aux power or do they have thier own supply?

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