Apollo XPander Combined Sounder & Optical Smoke Detector - XPA-CB-14016-APO

The XPander Combined Sounder and Detector is wireless and designed to provide one point detection and notification.

Operation

Photo-electric detection of light scattered by smoke particles over a wide range of angles. The optical arrangement comprises an infra-red emitter with a prism and a photo-diode at 90° to the light beam with a wide field of view. The detector’s microprocessor uses algorithms to process the sensor readings.

XPander sounders are ceiling mounted and use a bi-directional monitored radio platform to communicate. They feature 4 tone pairs, including the Apollo tone, and a self test which causes a fault signal to be sent if the sounders fail to operate.

Device Addressing

The address of a sounder or a combined sounder/visual indicator is set at the commissioning stage by means of a DIL switch. The sounder address is plus one of the address set. The sounders and combined 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 five-year life includes weekly tests and a half-hour sounding in a fire condition.

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.

Frequency

The frequency used by XPander is 868MHz which is the harmonised European radio frequency.

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