JPS6486484A - Illumination control system - Google Patents

Abstract

PURPOSE:To have centralized control of lighting fixtures from a main control board and provide individual controllability classified by fixtures or their groups by furnishing a signal producing terminal unit, which products a dimming control signal on the basis of data transmitted from the main operation board, and No.2 signal producing device which adjusts the dimming control signal delivered by the terminal unit and supplies to the dimming lighting fixtures. CONSTITUTION:Dimming data is fed in a signal producing terminal unit 7 from a main operation board 1, and a dimming control signal is prepared on the basis of this data and passed to signal producing devices 11 etc., via a transmission line 9. Each signal producing device 11 changes the dimming level indicated with the dimming control signal from the signal producing terminal unit 7 in accordance with setting on a level setting switch, or puts into a dimmed lighting fixture 13 upon restriction down the dimming level specified through setting of a restriction level setting switch. In case lighting power is supplied from an on/off terminal unit 5, a switch 15, etc., in each dimming lighting fixture 13, dimming operation etc., for the lighting fixture is made in response to signal from the signal producing device 11.