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A separate two-core, fire-protected cable fofor the alarm’s sounders is required as they are wired on different circuits. If a detector is activated, the control panel identifies the circuit that contains the triggered device and so indicates the zone fromwhich the fire alarmhas originated, but the area then has to bemanually searched to pinpoint the individual device. In large buildings this couldmean that over 50 zones would be needed to correctly protect the property to the prevailing industry standards – proving a costly and time consuming exercise.
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generate unwanted a potential problems, it modern components devices they can only
Because themajority of conventional detectors are simple, two state be in either a normal or fire condition. Although and quality systemdesign can play a part in reducing is not uncommon fofor conventional systems to larms.
Addressable or “intelligent”fire alarmsystems overcome these limitations and are designed fofor large commercial premises andmore complex networked systems. T conventional fofour-wir
e systems, having increased flexibi hey aremore expensive andmore
speed of identification, and scope of control. ffe
ewnews.c.co.ws o.u.uk complicated than In addressable systems, different types of initiating de
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one ormore single loops around the premises, requiring less cabling than conventional systems, with each detector or call point having its own unique address. The fire control panel receives infoformation and status reports fromeach device and indicates its exact location if there is a fafault, contamination or activation via smoke or heat detection. As these control panels have becomemore sophisticated andmore powerful, they are capable of handling an increasing number of loops per panel and it is possible to network numerous panels together to increase the capacity. Because analogue addressable fire alarmsystems offe
of flexibility, intelligence, speed of identification and the extent of control, they are the prefeferred option fofor specifiers and contractors working on bigger andmore intricate proj conventional fire alarmsystems.
ojects as they overcome the limitations of Feb Fe ru ebruary202 el 020 electricalwh wholesaler |33
ffer a greater degree
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