| 摘要 |
PROBLEM TO BE SOLVED: To confirm by a slave device installed outside a dwelling house whether a security device is energized or not. SOLUTION: When the security device 2 is energized to monitor the presence or absence of the input of security signals S1 from a security sensor 3 and a master device 1 is energized, an energization indication lamp 41 of the slave device 4 is lit based on either of a standby voltage DC1 and a communication voltage DC2 applied across a signal line L1 and a common line L2 or an alarm sound signal S3 (voltage thereof) outputted from an alarm sound signal generating circuit 23 by controlling the CPU 21 of the security device detecting the input of the security signals. When the security device is not energized, the communication indication lamp of the slave device goes off irrespective of whether the master device is energized or not. COPYRIGHT: (C)2003,JPO
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