Electric latch retraction is a function standard with fire exit doors. The lock latch moves into place when power is lost and secures the door. Emergency “panic” hardware still ensures safe egress from the inside, and these devices are always “fail-secure.” Fail-secure means that if the power is temporarily interrupted or fails, the door remains locked and the building is secured. “Fail-Safe” means that the locks will unlock when the power fails, and the door also opens from outside.

Fail-secure locks are typically used for computer rooms or other sensitive areas. These doors are usually used with a mechanical override, such as a regular key. Fail-secure locks are used for stairway doors or other fire-related doors. Keycode, key FOB, and access card systems provide a higher level of security. Employees are issued personally-identifiable numbers to access restricted areas. Periodic updates for key FOB systems automatically update codes to enhance security. Electronic access cards are similarly very secure and provide instant access to authorized areas.