Automatic smoke switches connected directly to the train bus can be used to selectively monitor single objects, such as control cabinets, containers, WCs and bathroom units, or general passenger areas and the driver's cabin. In principle, smoke switches operate using basic alarm and fault signals. Unlike the Rail 138 or Rail 256 fire detection systems, automatic smoke switches generate alarm and fault signals locally based on the “stand-alone” principle. As a result, the secure alarm transmission must be made using the train’s own communication system or train bus system. An optional status display can be used to display multiple (or far-away) smoke switches at once and forward their information to the train control equipment (for instance).
Selective monitoring of individual objects, such as