White Papers: Electric Strike Operation & Application
January 8, 2008
Strike - A metal plate located in the door jamb that is pierced or recessed to receive a projected bolt or latch, sometimes called a keeper.
Electric Strike - An Electric Strike is a jamb mounted electrical device activated by a push switch, keypad or card access control device that controls the locked or deadlocked mode of the movable keeper. When the keeper is locked and the door is closed, the lock's extended latchbolt is captured, keeping the door locked. When electrically activated, the keeper is permitted to pivot, thereby releasing the door lock's extended latchbolt and permitting the door to be pushed open without turning the knob or lever to retract the latch.
Several different electric strike designs are available to work with specific types of mechanical locks, including, cylindrical locksets, mortise locksets, deadbolts, and exit devices. Electric strikes are occasionally equipped with a buzzer to indicate when the keeper is released and the door may be open.
Failsecure Mode – A failsecure electric strike is locked when de-energized and unlocked when energized by the access control or other type of switching device. Failsecure electric strikes will lock or stay locked during a building power outage. A power supply with battery backup is required to provide unlocking capability during a power loss.
Failsafe Mode – A failsafe electric strike is locked when energized and unlocked when de-energized by the access control or other type of switching device or power loss.
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