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The Sigma Smart+Shield Alarm models for Panic Bars and Push Bars require some extra components in order to correctly monitor the emergency exit hardware, especially if you want to enable their pre-alarm feature. The key components are two robust pieces of red plastic as well as appropriate magnetic plates and reed contacts, included with your purchase, which are collectively named the Trigger Angle. These components connect to the exposed green switch plate on the alarm and rest either in front of or behind your exit hardware, monitoring for any pressure applied to them.
Both versions of the Trigger Angle are available to purchase as replacements.
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