Addressable Fire Alarm Systems
In larger, more complex buildings, Addressable fire alarm systems tend to be used. These systems offer the benefits of faster and more exact identification of the location of a fire and easier maintenance. Addressable systems also allow a single pair of wires to be used to connect a large number of devices to the system, providing cost savings in the wiring of large systems.
The wiring is looped, and connects to the control panel at each end. All detectors, call points, sounders and interface modules are wired directly to the loop, each having its own address. The control panel communicates with each device on the loop, and if a warning or fault condition is signalled, or if communications are lost with a detector, the alarm is triggered. The loop can be powered from each end so that if the loop is broken at any point, no devices are lost.