Electronic lock
Operating the lock can be as simple as using a switch, for example an apartment intercom door release, or as complex as a biometric based access control system.
This has caused fire marshals to impose strict rules on the use of mag locks and access control practice in general.
Additionally, NFPA 101 (Standard for Life Safety and Security), as well as the ADA (Americans with Disability Act) require "no prior knowledge" and "one simple movement" to allow "free egress".
Other problems include a lag time (delay), because the collapsing magnetic field holding the door shut does not release instantaneously.
Additionally, power outages could affect mag locks installed on fire listed doors, which are required to remain latched at all times except when personnel are passing through.
[further explanation needed] The first mechanical recodable card lock was invented in 1976 by Tor Sørnes, who had worked for VingCard since the 1950s.
The first card lock order was shipped in 1979 to Westin Peachtree Plaza Hotel, Atlanta, US.
In the US, since there is no current Certified Personnel Program to allow field installation of electric strikes into fire listed door openings, listing agency field evaluations would most likely require the door and frame to be de-listed and replaced.
A drawback of electrified exit hardware is their complexity, which requires skill to install and maintenance to assure proper function.
When the verification is passed, the key will power the coil in the passive electronic lock.
The internal structure of the lock contains a cylinder, which has a contact (lock slot) that is in contact with the key, and a part of it is an electronic control device to store and verify the received identification code and respond (whether it is unlocked).
The key contains a power supply device, usually a rechargeable battery or a replaceable battery in the key, used to drive the system to work; it also includes an electronic storage and control device for storing the identification code of the lock.
[2] Using this type of key and lock control system does not need to change user habits.
For example, some locks can access stored credentials on a personal digital assistant (PDA) or smartphone, by using infrared, Bluetooth, or NFC data transfer methods.
As biometrics become more and more prominent as a recognized means of positive identification, their use in security systems increases.
The technology has been approved since before the 1970s, but has become much more prevalent in recent years due to its usages in things like global supply chain management and pet microchipping.
