Prepayment Overload control RS485, PLC, wireless GPRS. Zigbee network optional With or without card Remote, AMI ,AMR 1. FUNCTIONS AND FEATURES1.1 Accurately measure active energy, no need for calibration of long term.1.2 LCD Display1.3 Support Infrared, RS485 communication., 1.4 Relay on/off control function.1.5 Friendly credit.2. MAIN PARAMETER Rated Frequency50HzWorking Voltage Range 0.7Un-1. ...