harmonic meter 1.CCC CE approved 2.AC input and AC output 3.low price with high quality Harmonic ... , MODBUS-RTU protocol, Baud rate:2400-19200Switching Input4-channels switching input, dry contact modeRelay Output3-channels relay output; AC250V/5A, DC30V ... than 100MΩWithstanding VoltageInput and power supply more than 2kV, input and output more than 1kV, power supply and output more ...