JPS6486479A - Illumination control system - Google Patents

Abstract

PURPOSE:To eliminate necessity for walking to restitute switch by manual operation and enhance convenience of a lighting control system by furnishing a switch on the power supply system of a lighting fixture and an automatic restitute means for the switch in the lighting control system for centralized control of a number of lighting fixtures from a main operation board through a plurality of terminal units. CONSTITUTION:In case a switch 61 is on, the source voltage is supplied to dimming lighting fixtures, so that dimming lighting fixtures 4 are dimming controlled on the basis of the dimming data sent from a main operation board 1 via terminal units 2. In case the switch 61 is off, on the other hand, no source voltage is supplied to the lighting fixtures 4, which are thus in extinguished condition at all times. In case a dweller etc., judges that there is no need for dim lighting under control from the main operation board 1, compulsory extinction can be made by turning off the switch 61 in this manner. Thereafter a restitute means 62 such as a timer turns on the switch 61 on certain conditions. This restitute function is conveniently used, for ex., where lighting is made in the daytime under control from the main control board 1 and the lighting fixtures are not in use at night.