摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a fire alarm system allowing an existing fire receiver to notify of malfunction. <P>SOLUTION: A fire alarm system 100, 200, or 300 comprises a sensor circuit 3 connected to a fire receiver 1, and a single or a plurality of fire sensors 2 connected to the sensor circuit 3 and outputting, by a switching operation, a fire signal to the sensor circuit 3. The fire sensor 2 includes: inspection means 12-14 for detecting its own malfunction by a self inspection; and output means 12-14, when there is malfunction on the basis of the results of the inspection means 12-14, outputting an abnormal signal to the sensor circuit 3. Disconnection generating means R, configured to disconnect the sensor circuit 3 when receiving the abnormal signal, is connected to the sensor circuit 3. The fire receiver 1 includes disconnection alarm issuing means 1 configured to issue a disconnection alarm when the sensor circuit 3 is disconnected. <P>COPYRIGHT: (C)2013,JPO&INPIT</p> |