XPander sounders can be wall or ceiling mounted and use a bi-directional monitored radio platform to communicate. They feature 32 selectable tones, including the Apollo tone, and a self test which causes a fault signal to be sent if the sounders fail to operate. The self-test feature is activated by a DIL Switch.

Individual parts may be ordered separately.

Electrical Description

The sounders and sounder/visual indicators are powered by two packs of batteries, one with three “AA” and one with three “C” size alkaline batteries which provide a working life of typically 3-5 years. The three-year life includes weekly tests and a half-hour sounding in a fire condition.

The Sounder Visual Indicators incorporate audio and visual signalling within one unit.

Sound output: 100dB(A)

Radio Communications

Fire detection systems are life-saving systems and must, therefore, be highly reliable in use. Radio communications have been developed to a point where high reliability can be guaranteed, provided that the rules for the design of radio systems and installation are carefully observed.

Radio communication technology in the detection has matured to the point where a standard has been drawn up as part of the EN54 family of standards for components of a fire detection system. The standard is EN54 Part 25.