["PZEM-017 for DC 0-300V Voltmeter Ammeter RS485 interface Modbus Voltage Current Power Energy Meter Electric Watt Meter Communication Module Box with 0-300V 300A Shunt USB Cable\n\nDescription:\nThis document describes the specification of the PZEM-017 for DC communication module, the module is mainly used for measuring for DC voltage, current, active power, frequency and energy consumption, the module is without display function, the data is read through the RS485 interface.\n\nFeatures:\nThe module is mainly used for measuring for DC voltage, current, active power, frequency and energy consumption.\nThe module is without display function and the data is read through the RS485 interface.\n\nSpecification:\nModel number: PZEM-017\nTypes: PZEM-017 Module+300A Shunt+RS485 USB Cable / PZEM-017 Module+50A Shunt+RS485 USB Cable / Only PZEM-017 Module\nWorking voltage: 0.05 ~300VDC\nTest voltage: 0.05 ~300VDC\nRated power: 0.02A-300A/0.2-90kW\nMeasurement accuracy: 1.0 grade\nfor Shell material: Reinforced nylon\nDimensions: 90x60.5x23mm/3.54x2.38x0.91inch\nColor: Black\nQuantity: 1 Set\n\nFunction and Display format:\n1 Voltage:\n1.1 Measuring range:0.05-300V. (when the test voltage is ＜7V, please use the independent power supply mode) \n1.2 Resolution:0.01V\n1.3 Measurement accuracy:1%\n2 Current:\n2.1 Measuring range:0.01-10A(PZEM-003);0.02-300A(PZEM-017;can be matched with 50、100、200、300A four kinds of shunt).\n2.2 Resolution:0.01A\n2.3 Measurement accuracy:1%\n3 Power:\n3.1 Measuring range:0.2-90kW(PZEM-017)\n3.2 Resolution: 0.1W\n3.3 Measurement accuracy:1%\n4 Energy Consumption:\n4.1 Measuring range: 0-9999kWh\n4.2 Resolution: 1Wh\n4.3 Measurement accuracy:1%\nReset energy: use software to reset.\n\nOver Voltage alarm:\nVoltage threshold can be set, divide into high voltage and low voltage threshold, when the measured voltage exceeds the threshold, it can alarm\nThe default high voltage threshold is 300V, the default low voltage threshold is 7V.\nCommunication interface: RS485 interface.\n\nCommunication protocol\nPhysical layer protocol\nPhysical layer use UART to RS485 communication interface.\nBaud rate is 9600, 8 data bits, 2 stop bit, no parity.\n\nOther instructions\n1 .RS485 interface is passive output, need external connect 5V power supply and the the external power supply should ＞100mA.\n2 .When the input test voltage is less than 7V, it must supply 5V independent work voltage through MICRO USB port；\nNote: Do not use the USB port bring by your PC to be the independent power supply, otherwise it may damage your PC !\n\nPackage includes:\n1 Set PZEM-017 for DC Communication Module\n(Choose 50A or 300A specifications, will send shunt and RS485 USB cable)"]