... RS485 communication: current, voltage, active power, frequency, kWh. Pmac901 Single Phase Energy Meter with following Features:1. LCD display kWh data2. Read data ... , kWh.3. 35mm DIN rail instaling, standard DIN ED50024. Active energy accuracy up to class 15. 6+1 digits LCD display ... and opposing energy8. One RS485 port, support MODBUS protocol Single phase Energy Meter / KWH Meter