Electric Door Lock
A remotely operated electric locking device. See Electric Strike, Electromagnetic Lock.

Electric Strike
An electric door lock that requires power to be applied to unlock a door.

Electromagnetic
A general term referring to the electric and magnetic fields associated with the movement of electrons through conductors.

Electromagnetic Lock
An electric door lock that uses an electromagnet to hold a door closed. See Magnetic Lock.

Embossed Card
An access control card that uses a raised pattern as a means of encoding data.

EMI
See Electromagentic Interference.

Encoding
The process of writing data to a card.

Entrance Delay
See Door Held Open Time.

EPROM
An acronym for Erasable Programmable Read Only Memory.

Event
An occurrence at a controller (such as unlocking a door, requesting to exit, forcing a door open) that generates a message stored by the controller.

Exit Alarm
A device that indicates (either audibly or silently) that a secure door has been forced opened.

Exit Lock
A push-bar door lock that spans the width of the door, used for emergency exit. An Exit Lock may be connected to an Exit Alarm.

Exit Reader
A reader used to control exiting from a secure area.

Exit Switch
A switch that is used to initiate a Request to Exit. See Request to Exit.