| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an illumination system in which ON/OFF control of a lighting device is possible even in a state where power supply of the lighting device is turned OFF, by utilizing the line of a single-phase three-wire power line into which a power switch is not inserted. <P>SOLUTION: In the illumination system having a plurality of lighting devices which are connected to a 200 V single-phase three-wire power line and lighted or unlighted, a power switch 2 and a relay 3 which turns each lighting device body ON/OFF are inserted in series into one line of the single-phase three-wire power line, and a power supply for control circuit which controls the relay 3 is constituted between another line of the single-phase three-wire power line and the earth. Since the power supply for control circuit is arranged so that the power supply input of a command transmitting/receiving unit 13 and a control circuit 14 is constituted of an OR circuit of the power supply output of a power supply circuit 16 and the power supply output of an AC-DC converter 11, ON/OFF control of a lighting device is possible even in a state where power supply of the lighting device is turned OFF. <P>COPYRIGHT: (C)2012,JPO&INPIT |
