Glossary For Fire Alarm

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MAGNETIC DOOR CONTACTS: This is an INPUT DEVICE that is normally used to detect the opening of a protected door or window. On sliding doors or windows, another contact can be installed that will allow an opening for fresh air circulation that is too small for an intruder to fit through (usually four to six inches).

MANUAL STATION (also known as a PULL STATION or MANUAL PULL STATION): A wall mounted device that is normally located close to an EXIT DOOR that, when activated, will cause the FIRE ALARM SYSTEM to sound in the premises.

MEANS OF EGRESS: A continuous path of travel provided by a doorway, hallway, corridor, exterior passageway, balcony, lobby, stair, ramp, or other egress facility or combination thereof, for the escape of persons from any point in a building, room, or contained open space to a public thoroughfare or other acceptable open space (means of egress includes exits and access to exits).

MONITORED ALARM SYSTEM: An ALARM SYSTEM that has been programmed to transmit signals to a CENTRAL STATION or other SECURITY or FIRE CONTROL CENTRE.

MOTION SENSORS: This refers to a family of INPUT DEVICES designed to detect movement within a specific field of view or detection pattern. Most MOTION SENSORS use one of two detection technologies: passive infrared, or microwave. Some sensors have been specifically designed to allow movement of pets (small animals) without triggering an alarm. These are commonly referred to as PET RESISTANT or PET IMMUNE. There are still some older motion detectors in service that use ultrasonic technology to sense movement within their range, but their use has been largely discontinued. A special motion sensor is often installed above an exit door to trigger an electronic release and open the exit door on the approach of an OCCUPANT.

MUNICIPAL TIE (DIRECT WIRE CONNECTION): Refers to a method of transmitting fire alarm information from a premises directly to a responding authority's dedicated receiving centre (usually located in the main fire hall). Some municipalities retain the infrastructure to provide this service at a very low monthly cost. See also DIRECT LINE. Can also be a part of a Municipal Call Box system. A special module is installed into a fire alarm panel that is supervised by the receiving equipment for "line fault", "common trouble", "supervisory" and "alarm".

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