DDSY23S Single-phase Split-type Keypad Prepayment Energy Meter is an active energy meter adopting digital media to exchange information. After the user loads the purchased energy to the meter, it charges with energy amount as basic unit. The meter is equipped with digital keypad interface to measure active energy and realize prepayment control functions. Its Measurement & Control Unit (MCU) includes Measurement Unit, Real-time Clock Unit, Load Switch and other auxiliary devices, and its Display Unit (UIU) includes Digital Keypad Interface and Display Screen. Function: When the balance energy value is zero or in overdraft, the disconnection signal is generated for controlling the automatic cutting off of load. The meter will measure automatically when input the new purchased energy. Self-detection and self-diagnose function Event record function (including cover opening event, tamper event and power failure event) Measuring normally when energy reversing Demand calculation Detection & control for user’s power load Applicable conditions: Ambient temperature -25℃ ~ +70℃，Storage temperature -40℃ ~ +70℃ Maximum relative humidity ≤95%； Operating voltage range: 0.70Un ～1.30Un: the meter can work normally within this voltage range Model Accuracy Class Nominal voltage Nominal Current DDSY23S-MCU 1.0 220V,230V,240V 5(80)A Technical Parameters Rated Frequency:50Hz No-load Running Current 5mA Impulse Constant ：1600imp/kWh LCD display: 6 integers + 2 decimals Starting current (0.4%Ib) 20mA Weight ： Conditionally Power consumption Power consumption of voltage circuit: ≤2W 10VA Power consumption of current circuit : ≤4VA Size: 140mm×92mm×40mm