Access Control System Glossary Term E,Chennai India - ATSS


Easy egress: A means of exiting where the person wishing to leave simply turns the doorknob to exit.

Earth Ground: An electrical connection point that brings all electrically neutral lines to the earth's surface potential (essentially zero potential). A good earth ground helps to protect electrical devices from damage caused by transients such as power surges and lightening strikes, and drains electrical interference from data, communication, and power lines that support these electrical devices. See Ground.

Egress: Exit, depart, leave (opposite of ingress).

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.

Electric Door Strike: An electric door locking device, usually solenoid operated, that will unlock a door when electric power is either applied, or removed, depending upon the configuration.

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

Electromagnetic Interference (EMI): Excess electromagnetic energy radiated by an electrical device that may affect the operation of other electrical devices.

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 Electromagnetic Interference

Encoding: The process of writing data to a card.

Entrance Delay: See Door Held Open Time.

Enclosure: A box or cabinet usually constructed of metal, which houses system components, such as circuit boards and other electronic and electrochemical controls and circuitry.

EPROM: An acronym for Erasable Programmable Read Only Memory. A programmed memory (often in a chip) that can not only be read, but can be repeatedly erased under high-intensity ultraviolet light and reprogrammed.

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.

Executive Privilege: An option which allows a cardholder unlimited access to all operational access points. Access may be without the system referring to any other access parameters, or there may be a PIN-code requirement that has been enabled.

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. A push button, switch mat, proximity detector, or other device which starts a timer in the reader interface electronics when someone is leaving through a controlled entry or exit. The timer bypass (shunts) the door-open detector for a selected period of time.