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7 Components
7.1 Block diagram
9 Block diagram
Current measuring: Manganin shunt
Voltage measuring: Resistor divider
A/D: Analog to digital converter for the sampled voltage and
current
MCU: Micro Controller Unit
Communication interface: RS485-Interface
Data storage EV3: nonvolatile storage for energy register +A/-A and meter pa-
rameter in EEPROM.
Display EV3: LCD with 7 digits
LED Pulse output: Active energy +A and -A, 1000 Imp/kWh
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