This module is mainly used for measuring DC voltage, current, active power, frequency and energy consumption, the module is without display function, the data is read through the RS485 interface. <br> <br>Features: <br> <br>It is mainly used for measuring DC voltage, current, active power, frequency and energy consumption. <br>Comes with built in shunt, the current measure range is 0.01-10A. <br>Physical layer use UART to RS485 communication interface, baud rate is 9600, 8 data bits, 2 stop bit, no parity. <br>The application layer use the ModbusRTU protocol to communicate, it only supports function codes such as 0x03, 0x04,0x06, 0x41, 0x42, etc. <br>Voltage threshold can be set, divide into high voltage and low voltage threshold, when the measured voltage exceeds the threshold, it can alarm. <br> <br>Specification: <br>Brand: PEACEFAIR <br>Model: PZEM-003 <br>Voltage: <br> <br>Measuring Range: 0.05-300V (When the test voltage is ＜7V, please use the independent power supply mode) <br>Resolution: 0.01V <br>Measurement Accuracy: 1% <br>Current: <br> <br>Measuring Range: 0.01-10A <br>Resolution: 0.01A <br>Measurement Accuracy: 1% <br>Power: <br> <br>Measuring Range: 0.1-3kW <br>Resolution: 0.1W <br>Measurement Accuracy: 1% <br>Energy Consumption: <br> <br>Measuring Range: 0-9999kWh <br>Resolution: 1Wh <br>Measurement Accuracy: 1% <br>Reset Energy: Use Software to Reset <br>Over Voltage Alarm: <br> <br>Default High Voltage Threshold: 300V <br>Default Low Voltage Threshold: 7V <br>Communication Interface: RS485 Interface <br>Working Temperature: -20~60℃ <br>Product Size: Approx. 9*6*2.3cm/3.5*2.4*0.9inch <br>Weight: Approx. 72g~92g / 2.5oz~3.2oz <br>Description Resolution <br>Voltage value 1LSB correspond to 0.01V <br>Current value 1LSB correspond to 0.01A <br>Power value low 16 bits 1LSB correspond to 0.1W <br>Power value high 16 bits <br>Energy value low 16 bits 1LSB correspond to 1Wh <br>Energy value high 16 bits <br>High voltage alarm status 0xFFFF is alarm,0x0000 is not alarm <br>Low voltage alarm status 0xFFFF is alarm,0x0000 is not alarm <br> <br> <br> <br>Register address Description Resolution <br>0x0000 High voltage alarm threshold(5~350V), <br>default is 300V 1LSB correspond to 0.01V <br>0x0001 Low voltage alarm threshold（1~350V）, <br>default is 7V 1LSB correspond to 0.01V <br>0x0002 ModbusRTU address The range is <br>0x0001~0x00F7 <br> <br> <br> <br>Optional Kit <br>#1 1 x DC Consumption Meter <br>#2 1 x DC Consumption Meter <br>1 x RS485 to USB Cable <br> <br>Note: <br> <br>RS485 interface is passive output, need external connect 5V power supply and the external power supply should ＞100mA. <br>When the input test voltage is less than 7V, it must supply 5V independent work voltage through USB port. <br>Do NOT use the USB port bring by your PC to be the independent power supply, otherwise it may damage your PC.<br>1、It is mainly used for measuring DC voltage, current, active power, frequency and energy consumption <br>2、Comes with built in shunt, the current measure range is 0.01-10A <br>3、Physical layer use UART to RS485 communication interface, baud rate is 9600, 8 data bits, 2 stop bit, no parity <br>4、The application layer use the ModbusRTU protocol to communicate, it only supports function codes such as 0x03, 0x04,0x06, 0x41, 0x42, etc <br>5、Voltage threshold can be set, divide into high voltage and low voltage threshold, when the measured voltage exceeds the threshold, it can alarm