How To Use Maglocks With Battery Power Legally

Author: Brian Rhodes, Published on Jun 02, 2014

When the power goes off, maglocks leave your doors unlocked... right?

Unless backup power is used, the answer is true. Contrary to popular belief, backing up maglocks is not against national codes - if done properly. In this note, we take a look at what the code actually says about power backups for maglocks, where they might be illegal, and how to do it right when allowed.

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Comments (1)

Something missing from the diagram above is that for a door in the path of egress using a maglock, it must have both a NFPA approved PIR and REX button in line with the maglock power. Simply the input from firealarm at the power supply is not enough. The REX is required to release for a minimum of 30 seconds while the PIR release is not required to be maintained. The PIR and REX can have additional outputs wired to the security panel to shunt the DPS triggerd forced alarm, but per code they must be able to physically break power.

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