... ,15(90)A,20(100)A,5(40)A DDS13521B smart electric meterFunctions and Features ( Electric meter )1. 35mm standard DIN ... standard DIN EN50022. May select 5+1 digits register by step type display3. Impulse output when no power, complying with standard ... +1 LCD display.Ii can display total energy consumption by step type impulse register,it has following features: Good reliability,small ...