Local control system for domestic appliances and alarm devices

Details Local control system for domestic appliances and alarm devices Local control system for domestic appliances and alarm devices

G - Physics

08

C

340/79

G08C 19/00 (2006.01) G08B 26/00 (2006.01) G08C 19/02 (2006.01) H04Q 9/00 (2006.01) H04Q 9/14 (2006.01)

Patent

CA 1279117

A B S T R A C T A local control system for macines, apparatus, alarm devices, sensors and similar system loads (11) in a home comprises a central unit (10) and a two-wire bus line (13) interconnecting the central unit and the system loads. The re- spective system load (11) is connected to the bus line (13) via a terminal unit (12). In dependence on a voltage signal emitted by the central unit (10) and being unique for each respective terminal unit said terminal unit connects the system load (11) to the line (13) or disconnects the load. The central unit detects changes in status of the bus line current and determines out of the said changes the status of the system load (11). For example, the status may be a receipt of the connection of an alarm loop, an indication of the breaking of an alarm loop or an indication of the measurement value of a connected sensor.

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