Breakglass Units

Breakglass units provide a way of disconnecting power to an electric lock to ensure that people can escape through the door in an emergency if the access control system has malfunctioned due to fire damage etc.

A modern development of the breakglass unit is the resettable breakglass - the "glass" does not break but simply "pops" down to activate.  A reset key is normally supplied with the unit.

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