专利名称：Circuit arrangement for the transmission of
measured values to a central station,especially for a fire signalling system
发明人：KLETT, WERNER, ING.-GRAD.,BAUMANN,
HANS-PETER, DIPL.-ING.
申请号：EP82104317.1申请日：19820517公开号：EP0066737A1公开日：19821215
专利附图：
摘要：In the invention, a plurality of fire sensors are allocated in parallel on a two-wire
line via which at the same time the supply voltage for the fire sensors is provided. Themeasured value is formed by connecting, under the control of a local pulse generator, ameasured value shunt to the two-wire line in order to generate measured value pulses.Each measured value generator (3, 4) is provided with a pulse generator (11, 12)programmed to emit an individual pulse code. The pulse code serves in the centralstation as an address which can be evaluated behind a first threshold value switch (21). Atthe end of the two-wire line (1, 2) facing away from the central station (6), there is amonitoring shunt (16, 17) which is permanently connected through by pulses by means ofa pulse generator (15) also arranged at this end and , specifically, in order to generatemonitoring pulses (15) which can be evaluated in the central station (6) behind a secondthreshold value switch (22). The amplitude of the monitoring pulses (15) and thethreshold value, exceeded by them, of the second threshold value switch (22) issubstantially smaller than the amplitude of the pulse code and the threshold value,exceeded by the latter, of the first threshold value switch (21).
申请人：HEKATRON GMBH
地址：Betbergerstrasse 12 D-79295 Sulzburg DE
国籍：DE
代理机构：Bardehle, Heinz, Dipl.-Ing.
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