| 摘要 |
PROBLEM TO BE SOLVED: To provide a fire alarm system capable of surely transmitting a signal by a circuit as simple as possible. SOLUTION: In this fire alarm system in which at least a fire alarm, terminal equipment 3 including a fire detector, and a fire receiver 1 for detecting a fire and handling when the fire occurs by operating the terminal equipment 3 are mutually connected by a signal line Lw for monitoring control and a fire display machine 2 for displaying based on a display control signal transmitted from the fire receiver 1 and the fire receiver 1 are mutually connected by a signal line Ld for controlling the display machine, an insignificant signal is transmitted and then a signal for control is transmitted when signals are transmitted and received between the fire receiver 1 and the fire display machine 2.
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