Fire alarm system
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United States of America Patent
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-
Feb 2, 2016
Grant Date -
Jan 9, 2014
app pub date -
Jul 5, 2013
filing date -
Jul 5, 2012
priority date (Note) -
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status (Latency Note)
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Abstract
Provided is a fire alarm system including: a transmitter/receiver unit (4) for supplying a pulse voltage to power/signal lines (SG); a current value setting unit (5) for setting, as a current limiting value, an upper limit of a current output to the power/signal lines (SG) from the transmitter/receiver unit (4) when the pulse voltage is output; and a current control unit (6) for controlling the transmitter/receiver unit (4) to output a current having a value equal to or smaller than the current limiting value set by the current value setting unit (5). Accordingly, it is possible to prevent a malfunction from occurring in communications irrespective of a scale of the fire alarm system.
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