Two
Wire Fire Alarm Systems
Traditionally
fire alarm systems have been know as conventional / non-addressable and
analogue addressable type fire alarm systems. However in recent years a
new type of fire alarm system has been introduced into the market. These
systems are known as two wire systems.
What are Two Wire Fire Alarm Systems?
Two
Wire Fire Alarm Systems are zoned similarly to a conventional fire alarm system
in that the panels are sized by the amount of zones they can accomodate.
Typically two wire fire alarm system panels are available in 2 zone,
4 zone and 8 zones, again similar to modern conventional fire alarm
systems. A traditional conventional fire alarm system will have separate
detection zone radial circuits which accommodate the detectors and call points
on the system and separate sounder and beacons radial circuits. The
difference with a two-wire fire alarm system is that they can accomodate
detectors, call points, sounder and beacons all on the zone radial circuit.
The benifits of Two Wire Fire Alarm Systems
The
main benefit of two wire fire alarm systems is the reduced installation
costs. With the detectors, call points, sounders and beacons all being on
the same radial circuit there is now no need to wire seperate sounder radial
circuits. This can reduce the installation costs dramatically and also
reduce the installation time.
Another
benefit of Two Wire Fire Alarm Systems is that many of the manufacturers have
detectors with integral sounders. This again means that the system can
offer detection and sounders in a single installation point on the same radial
zone circuit, again reducing installation costs.