Nitto Kohki-Delvo DLC16S-WUB DLV02/12/16 Series Controller, 240VNitto Kohki Delvo DLC16S WUB DLV02 12 16 Series Controller, 240V A Series Controller is an electronic device used to regulate and manage the flow of current in a series circuit. It ensures optimal performance of connected components by maintaining a consistent voltage or current level, protecting against overloading, and managing power distribution.