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? This module which provides 4 loops with the output of 5A per loop relay is used to control the main circuit switch of the ballast, and can also be used to control the common switch load. In addition, 4 control signals of 0~10V are provided to control the high-frequency electronic ballast using 0~10V control signal to adjust the fluorescent lamp. There are operation indicators and corresponding loop status indicators on the module panel and you can switch or dimming directly through each button. This module is installed with standard guide rail, and the wiring adopts high reliable plug and pull terminals to make it very easy for engineering installation and maintenance. Combined with local control button and loop status indicator, debugging is very simple and convenient.