... of DC breaker and outputing contact signal in photovoltaic power system. And they all have interfaces with air velocity transducer, ... Power frequency withstand voltagePower supply, PV input, relay output, communication, solar cell voltage input AC 2.5kV/1min (to note)Sensor ... Local LED displays the current of each input channel, turning off automatically;6. Option 2 RS485 port, Modbus-RTU protocol; ...