An electromagnetic lock, magnetic lock, or maglock is a locking device that consists of an electromagnet and an armature plate.
there are two main types of electric locking devices. locking devices can be either "fail-safe" or "fail secure".
a fail-secure locking device remains locked when power is lost. fail-safe locking devices are opened when de-energized.
direct pull electromagnetic locks are inherently fail-safe. typically the electromagnet portion of the lock is attached to the door frame and a mating armature plate is attached to the door.
the two components are in contact when the door is closed. when the electromagnet is energized, passing through the electromagnet creates a magnetic flux that causes the armature plate to attract
the electromagnet, creating a locking action. because the mating area of the electromagnet and armature is relatively large, the force created by the magnetic flux is strong enough to keep the
door locked even under stress.
electronic door lock