Study Of Code Converters Grey, Binary, Excess 3 is an SSI India product in the Digital Electronics category. Key specifications include SKU: PDE-E112. Binary to Excess-3 Code Converter. Excess-3 to Binary Code Converter TECHNICAL SPECIFICATIONS: Power Supplies. DC Power Supply +5V,150mA. Operated on Mains power 230V, 50Hz +10% TECHNICAL SPECIFICATIONS.