Alarm Related Terms

Explain alarm installation setting terms meaning. Technology of alarm detectors.
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vedard
Posts: 225
Joined: Wed Mar 05, 2014 8:17 am

Alarm Related Terms

Post by vedard » Mon Feb 20, 2017 2:40 pm

The security alarm device is designed and produced according to National Electrical Code (NEC), ANSI/TIA/EIA standards of residential security and commercial security. There are some important terms we should know and understand to help us properly using the security alarm system.
Bus: An electrical conductor or set of conductors that serve as a common connection for electrical circuits.
Data bus: Conductors or cable that is employed to transfer data and control signals.
Central station: An alarm monitoring facility which receives and acts upon signals transmitted to them by subscribers alarm systems.
Chime: An audible signal with a rhythmic tone used to annunciate a change in status of an alarm system, such as the opening of a door.
Communicator format: The established communications protocol, designated by control panel programming, that will be used for communications between the alarm system's digital communicator and the receiver at a monitoring facility.
Contact ID: A relatively fast DTMF communications format developed by Ademo used by alarm system digital communicators for information exchange with a remote monitoring facility.
EOL: Abbreviation for end of line.
DTMF: Abbreviation for dual tone multi-frequency.
Dual Tone multi-frequency: (DTMF) Two simultaneous audio frequencies used to control telephone switching equipment, such as dialing, and other control circuitry.
Duress code:
(1) A code, password or pass phrase used by an individual when that person is being forced to gain access to protected area or system.
(2) An special access code, which initiates a silent alarm, used when a person is being forced to disarm an alarm system.
End of line relay: A device used to supervise or monitor power supplied to powered sensors on an normally open loop or zone, such as 4-wire smoke detectors.
End of line resistor: A termination resistor placed a the end of a supervised zone or loop.
End of line supervision: A method of monitoring the integrity of a zone or loop that usually employs a termination resistor or a specified value.
Event log: A file containing a limited history of certain actions or mode changes that have occurred on an alarm system.
Fire loop: A protective circuit or zone which supports fire detection or fire alarm initiation devices, such as smoke detectors, pull stations, etc.
Force arm: A feature supported by some control panels that automatically bypasses any open or faulted zones which enables arming of the alarm system.

vedard
Posts: 225
Joined: Wed Mar 05, 2014 8:17 am

Re: Alarm Related Terms

Post by vedard » Wed May 23, 2018 1:09 pm

Today's Alarm System is innovated with best and latest technology. The smart home security is with capabilities of home automation and remote operation.

But Alarm Basics is keeping the same and it is the core of home security system. The principle of home security system is designing the system to detect dangers and notify people at first time to save property and lives.

We need to understand the Alarm Basics. We need to know the security system components and their function. Only after this, we can know what we need to have for our home security.

Alarm Control Panel sometimes is named alarm communicator. Its basic function is receiving signals from initiation devices (contacts, motion detectors, smoke detectors etc.) and activates appropriate notification devices (dialer, horns, strobes). Besides that, the alarm control panel is working to monitor system wiring, status of all system devices and primary power. It processes programmed instructions and reactions. So, the alarm control panel is the heart of home security system. Backup battery is required to keep the security system working for at least 8 hours during AC power failure time.

Keypad is an useful security component but always ignored by home security DIYers. Cause alarm control panel is always hidden for security reason, keypad is used to control and monitor the system instead. With LCD keypad, the system status such as alarm event, zone status can be queried. Keypad can arm, disarm, bypass alarm zones.

Input Devices are detectors used to monitor specific conditions and report status changes to the control panel. They are "Eyes and Ears" of the system. According to responsibility, they are classified as intrusion detectors, perimeter detectors, environment detectors and fire detections.

Output Device is visual, audible or both signal warning device. They are alarm bells, sirens and strobes and activated by alarm control panel or detectors, remotes. For example, MD-214R is a wireless siren strobe can be triggered by maximum 48 detectors or remotes without panel. The same for HB-JHD-2 solar powered siren strobe which can equip max.32 devices. Siren Strobe Alarm Signal gives on premises warning to scare theft and notify neighbors, police patrol.

Both input and output devices can have wireless types. There is wireless transmitter module in the input, output device. On equal, there is wireless receiver module in alarm control panel to pick up the signal. Professional alarm systems manufacturers adopt technology to encrypt the signal especially for burglar alarm. So, when you buy wireless burglar alarm device, make sure to pick up same brand devices and same frequency, for example 433MHz.

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