E
Earth Ground
The grounding of a device using a copper conductor connected to a copper clay rod in the earth.
Egress
A programming option that allows individual access doors to be assigned to detect anti-passback violations. See Anti-Passback.
Electric Door Strike
An electric door locking device (usually solenoid-operated) that unlocks the door when electrical power is applied to it. A fail-safe configuration operates in reverse; it is normally locked when power is applied and unlocked when power is interrupted.
Electromagnet
A coil of wire, usually wound on an iron core, that produces a strong magnetic field when current is sent through the coil.
Electromagnetic
Pertaining to the relationship between current flow and magnetic fields.
Electromagnetic Interference (EMI)
Impairment of the reception of a wanted electromagnetic signal by an electromagnetic disturbance which can be caused by lightning, radio transmitters, power line noise, and other electrical devices.
Electronic Access Control (EAC)
An electronic system comprising a credential, a reader and a door controller that is managed with a Wiegand interface to communicate data for access control.
Electronics Industry Association (EIA)
An electronics industry trade association that formulates technical standards, disseminates marketing data, and maintains contact with government agencies.
Emergency Release
An optional lock feature that allows you to override the lock and retract the bolt in an emergency. It can be operated either mechanically or electrically.
Emergency Zone (EM)
A zone type used for reporting medical or other non-panic emergencies to the monitoring center receiver.
Encryption
Secure data communications. DMP offers NIST approved and UL Listed AES encrypted communication.
End-of-Line Device (EOL)
A device, such as a resistor (EOLR), placed at the end of a Class B wire zone to maintain supervision.
End-of-Line Power Supervision Relay
A device used to supervise power (usually for four-wire smoke detectors) and installed within the last device on the zone.
Entry Check-in Protection
Patented DMP feature that ensures the system still works even if the panel is destroyed. It’s a proactive safeguard against a burglar’s fast tactic to disable the security system before it can send an emergency signal.
When an exit zone (usually a door) is opened, the panel sends a check in directly to the receiver at the monitoring center. If the alarm message is not disarmed in the designated delay timeframe, the trouble signal is sent directly to the monitoring center. There are no intermediary servers or network operation centers, and no retransmission or reinterpretation of the information over the Internet. This ensures faster response and eliminates concerns about signals not being properly relayed or intermediate communication links failing.
Entry Delay
The length of time programmed into the system when the user can enter the premises through an exit zone (usually a front door) and disarm the system.
Entry Output
A specified output on a panel that is turned on at the start of the Entry Delay time. The output is turned off when the area is disarmed or the entry delay time expires.
Entry Zone
A zone type that allows the user a short amount of time to enter and exit while the system is armed without setting off an alarm.
Erasable Programmable Read-Only Memory (EPROM)
Pronounced ee-prom.
A special type of memory that retains its contents until it is exposed to ultraviolet light. The ultraviolet light clears its contents, making it possible to reprogram the memory. To write to and erase an EPROM, the user needs a special device called a PROM programmer or PROM burner.
Ethernet
The most widely used local area network (LAN) technology. Defined as the 802.3 standard by the IEEE, the Ethernet access method is used to connect computers or other network devices, such as a control panel, in a company or home network, as well connect to a single computer to a modem for Internet access.
Events
System activity that generates messages to the reporting device.
Events Manager
A programming option that specifies when non-alarm reports are sent to the receiver. Selecting this option does not affect Zone Alarm, Zone Trouble, Zone Restoral, Supervisory or Serviceman reports. Closing reports are not delayed if the Closing Wait option is enabled.
Exit Alarm
An alarm that occurs when a zone is still faulted at the end of the Exit Delay time. This usually occurs when the door where the user exited does not close all the way before the programmed exit time expired.
Exit Button
A button serving as an electrical switch that releases a lock on an exit door when depressed. This is called a Request to Exit (REX) button.
Exit Delay Time
The length of time programmed into the system when the user can exit the premises through an exit zone (usually a front door) and disarm the system.
Exit Error Keypad Alert and Reporting
Automatic function of the panel that prevents a false alarm from occurring if an exit door does not properly close after the system is armed.
For example, a user closes all doors and windows, arms the system, and then leaves by the front door. However, the door doesn’t latch and opens slightly, causing the front door zone to show as a fault to the system. At the end of the exit delay, one of two sequences occurs:
For Exit Zones Defined by Entry Delay 1, the following sequences actions occur:
The bell sounds for the length of time set in Bell Cutoff programming.
The Entry Delay operation starts requiring code entry to disarm.
if not disarmed, a zone alarm and an exit error are sent to the receiver.
For Exit Zones Defined by Entry Delay 2-4, the following sequences actions occur:
The zone is force armed and a zone force arm message is sent to the receiver.
An Exit Error is sent to the receiver.
The bell sounds for the length of time set in Bell Cutoff programing.
This allows the monitoring center to acknowledge an arming error without dispatching the police on a false alarm.
Exit Output
A specified panel output that is turned on any time an Exit Delay time starts in any area of the system. The output is turned off when the Exit Delay time expires or when the arming has been stopped.
Exit Zone (EX)
A zone type usually assigned to a perimeter door that allows users a programmable amount of time to enter and exit while the system is armed without setting off an alarm.
Extended Binary Coded Decimal Interchange Code (EBCDIC)
A coding system that uses eight bits of data to represent alphanumeric characters and control sequences. This is used by IBM mainframes.