Handset of automatic fire alarm system, parent machine of automatic fire alarm system, and automatic fire alarm system using them

摘要

PROBLEM TO BE SOLVED: To provide a slave unit capable of reducing the possibility of making an unexpected erroneous alarm.SOLUTION: A slave unit 1 in an automatic fire alarm system 100 includes a communication section 16, a determination section 171 and a control unit 172. The communication section 16 communicates with a master unit 2. Determining an occurrence of a fire, the determination section 171 enters into a standby state to issue a fire alarm, and when determining to establish an interlock, the determination section 171 enters into a standby state to issue a notification of establishing interlock. The control unit 172 notifies either one of the fire alarm or the interlock notification to the master unit 2 by changing the current flowing on a pair of wires 51 and 52. When receiving a permission from the master unit 2 in the standby state, the control unit 172 notifies a specific notification which includes at least one of the fire alarm and the interlock notification to the master unit 2.SELECTED DRAWING: Figure 1