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This module is a 4-way 16A programmable switch controller which has 4 circuits of 16A. It is suitable for switching control of any type with load of light source and non light source. 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.