| 摘要 |
PURPOSE:To reduce a current consumption by turning an optical coupler in the waiting state of a reduced current consumption when detection of an object to be detected is not necessary. CONSTITUTION:A judging means 26 reads in a data signal transmitted from an outside controller, and judges whether or not an identification code transmitted from the outside controller is coincident with the identification code of its own stored in an address memory 21, and when they disagree, the optical coupler is turned into the waiting state. On the other hand, when they are coincident with each other, the power sources of both a light emitting element 10 and a light receiving element 11 are turned on, the presence or absence of the object to be detected is detected by the received light quantity of the light receiving element 11, and the detected result is outputted through an operating means 27 to the outside controller. After that, the power sources of the light emitting element 10 and the light receiving element 11 are turned off, and the optical coupling device is returned back to the waiting sate. Thus, the power source of the optical coupler is turned off if unnecessary, so that the the current consumption can be reduced. |
