Apollo XP95 Weatherproof Multi-Tone Open-Area Sounder Visual Indicator is designed for use in outdoor open areas and can be connected to any Discovery or XP95 system. The sounder visual indicator complements Apollo’s intelligent and integrated base sounders as well as the multi-tone open-area sounder. The multi-tone open-area alarm devices are powered directly from the loop and need no external power supply. It operates at 18 to 28VDC and are polarity sensitive. Synchronisation of the tones ensures the integrity of the signal – tones from different sounders do not merge into one signal that could be mistaken for a different tone. A nominal sound output of 100dBA is achieved at a current consumption of 5mA in the case of the sounder and 9mA for the sounder beacon. The maximum number of sounders that may be connected to a particular loop should, however, be determined by a loop loading calculation using the Apollo loop calculator. Since the multi-tone open-area alarm device is intended for use in open areas, it is possible for more than one sounder to be audible at any given point in a building. For this reason, the operation of all the sounders may be synchronised by sending address 0 in exactly the same way as for the XP95 sounder control unit. Not only that, the multi-tone open-area alarm device can be assigned group addresses as well as individual addresses, so that the functional options of the sounder are identical with those of the sounder control unit. The multi-tone open-area alarm devices are fitted to the mounting surface with four screws. The weatherproof versions have an additional square backbox and there are three drill centre points for cable entry marked on the upper and lower face. The device will operate only with control equipment using the Apollo XP95 or Discovery protocol. The features of the multi-tone open-area alarm device is available only when the sounder is connected to a control panel with the appropriate software.