PURPOSE: To reduce current consumption by supplying only a current required for the operation of a fire alarm when a fire is detected, and supplying the current required for the light emission of a confirmation lamp intermittently to the fire alarm when it is operated.
CONSTITUTION: A microcomputer MPU and constant current circuits CC1-CC3 or the like are provided at a repeater T, and an operation confirming lamp LED, an SCR, and a fire phenomenon detecting part FS or the like are provided to the fire alarm DE. When a detecting part FS detects smoke with prescribed density and the SCR is turned on, the MPU supplies the current to hold the on-operation of the SCR by operating the CC1, and supplies a large current to the confirming lamp LED by operating the circuit CC3 only for prescribed time.
| JP2010049625 | WIRELESS ALARM SYSTEM |
TSUMIJI AKIO
HIDETOKU TAKAHARU
