Nohmi Bosai Ltd.

Katsuhide Tsubokawa

Masahiro Hagita

Masaki Takahashi

Masaru Nishina

Provided is a fire alarm system including: a transmitter/receiver unit () for supplying a pulse voltage to power/signal lines (SG); a current value setting unit () 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 () when the pulse voltage is output; and a current control unit () for controlling the transmitter/receiver unit () to output a current having a value equal to or smaller than the current limiting value set by the current value setting unit (). Accordingly, it is possible to prevent a malfunction from occurring in communications irrespective of a scale of the fire alarm system.

Fire alarm system

A fire control panel in which an address map window (), in which terminal device control switches () each indicating an address number (AD) of a terminal device are arranged in a matrix shape, is displayed on a display/operation unit (). In addition, each of the terminal device control switches () corresponding to a status stored in a terminal database (DB) is displayed in a display mode that differs depending on each status. Accordingly, it is possible to grasp status information on a large number of terminal devices at a glance through one screen.

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Tokyo, Japan

Katsuhide Tsubokawa