| 摘要 |
PROBLEM TO BE SOLVED: To provide an alarm system capable of outputting an alarm sound even if failure occurs in a prescribed alarm when a plurality of alarms are made to communicate and operate.SOLUTION: An alarm system X for giving an alarm by detecting abnormality in an external environment comprises a master unit 10a and at least one slave unit 10b capable of communicating with the master unit 10a. At prescribed timing, the slave unit 10b transmits a failure determination signal S4 indicating whether slave unit side alarm means 15b is defective or not and a slave unit side alarm signal S1b to the master unit 10a. When the slave unit side alarm means 15b is defective, master unit side alarm means 15a outputs a slave side alarm sound signal S2b as an alarm sound.SELECTED DRAWING: Figure 1 |
