Peacefair DC 0-300V 100A Current Voltage Tester RS485 Modbus Power Energy Meter Digital Wattmeter Car voltmeter with 100A shunt
This document describes the specification of the PZEM-003/017 DC communication module, the 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. PZEM-017: Measuring Range 50A、100A、200A、300A (the current range is depend on the external shunt specification )
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1. Working voltage: 0.05 ~300VDC 2. Test voltage: 0.05 ~300VDC 3. Rated power: 0.02A-300A/0.2-90kW 4. Measurement accuracy: 1.0 grade
Function and Display format
1 Voltage 1.1 Measuring range:0.05-300V. (when the test voltage is <7V, please use the independent power supply mode) 1.2 Resolution:0.01V. 1.3 Measurement accuracy:1%.
2 Current 2.1 Measuring range:0.01-10A(PZEM-003);0.02-300A(PZEM-017;can be matched with 50、100、200、300A four kinds of shunt). 2.2 Resolution:0.01A 2.3 Measurement accuracy:1%
Over Voltage alarm Voltage threshold can be set, divide into high voltage and low voltage threshold, when the measured voltage exceeds the threshold, it can alarm The default high voltage threshold is 300V, the default low voltage threshold is 7V.
Communication interface RS485 interface.
Communication protocol Physical layer protocol
Physical layer use UART to RS485 communication interface. Baud rate is 9600, 8 data bits, 2 stop bit, no parity.
Other instructions 1 RS485 interface is passive output, need external connect 5V power supply and the the external power supply should >100mA. 2 When the input test voltage is less than 7V, it must supply 5V independent work voltage through MICRO USB port; Note: Do not use the USB port bring by your PC to be the independent power supply, otherwise it may damage your PC !