... communication: current, voltage, active power, frequency, kWh. Pmac901 Single Phase Energy Meter with following Features:1. LCD display kWh ... voltage, active power, frequency, kWh.3. 35mm DIN rail instaling, standard DIN ED50024. Active energy accuracy up to class ... and opposing energy8. One RS485 port, support MODBUS protocol Single Phase Din Rail Kwh Meter ( Energy Meter, Static Meter, Electric Meter ...