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Security Fundamentals & Crypto · Intermediate

Electromagnetic Lock

Lock that uses an electromagnet to hold a door closed, releasing when power is removed.

Definition

Maglocks are inherently fail-safe because they unlock when power is lost, which supports life safety for egress doors. They are integrated with access control systems, request-to-exit sensors, and fire alarms. Electric strikes can be configured as fail-safe or fail-secure.

Example

A fire alarm cuts power to maglocks so occupants can exit through secured doors.

Exam tip

Maglock = fail-safe by design; check fire codes for egress doors.

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