Features:The current measure range is 50A, 100A, 200A, 300A depend on the external shunt specification.There are 10 different kits to choose, enough to meet your various need.Physical layer use UART to RS485 communication interface, baud rate is 9600, 8 data bits, 2 stop bit, no parity.The application layer use the ModbusRTU protocol to communicate, it only supports function codes such as 0x03, 0x04,0x06, 0x41, 0x42, etc.Specification:Brand: PEACEFAIRModel: PZEM-017Resolution: 0.01VMeasurement Accuracy: 1%Current:Measuring Range: 0.02-300A (Can be matched with 50A, 100A, 200A, 300A four kinds of shunt)Resolution: 0.01AMeasurement Accuracy: 1%Power:Measuring Range: 0.2-90kWResolution: 0.1WMeasurement Accuracy: 1%Energy Consumption:Measuring Range: 0-9999kWhResolution: 1WhMeasurement Accuracy: 1%Reset Energy: Use Software to ResetCommunication Interface: RS485 InterfaceWorking Temperature: -20~60Product Size: Approx. 9*6*2.3cm/3.5*2.4*0.9inchWeight: Approx. 77g~287g / 2.7oz~10.1ozRegister addressDescriptionResolution0x0000Voltage value1LSB correspond to 0.01V0x0001Current value1LSB correspond to 0.01A0x0002Power value low 16 bits1LSB correspond to 0.1W0x0003Power value high 16 bits0x0004Energy value low 16 bits1LSB correspond to 1Wh0x0005Energy value high 16 bits0x0006High voltage alarm status0xFFFF is alarm,0x0000 is not alarm0x0007Low voltage alarm status0xFFFF is alarm,0x0000 is not alarmRegister addressDescriptionResolution0x0000High voltage alarmthreshold(5~350V),default is 7V1LSB correspond to 0.01V0x0002Modbus-RTU addressThe range is 0x0001~0x00F70x0003The current range0x0000: 100A0x0001: 50A0x0002: 200A0x0003: 300AOptionalKit#11 x DC Consumption Meter#21 x DC Consumption Meter1 x RS485 to USB Cable#31 x DC Consumption Meter1 x 50A Shunt#41 x DC Consumption Meter1 x 100A Shunt#51 x DC Consumption Meter1 x 200A Shunt#61 x DC Consumption Meter1 x 300A Shunt#71 x DC Consumption Meter1 x RS485 to USB Cable1 x 50A Shunt#81 x DC Consumption Meter1 x RS485 to USB Cable1 x 100A Shunt#91 x DC Consumption Meter1 x RS485 to USB Cable1 x 200A Shunt#101 x DC Consumption Meter1 x RS485 to USB Cable1 x 300A ShuntNote:RS485 interface is passive output, need external connect 5V power supply and the external power supply should 100mA.Do NOT use the USBport bring by your PC to be the independent power supply, otherwise it may damage your PC.