This module is mainly used to measure DC voltage, current, active power, frequency and power consumption, the module has no display function, the data is read through the RS485 interface. It is mainly used to measure DC voltage, current, active power, frequency and power consumption. Current measurement range is 50A, 100A, 200A, 300A depending on external shunt specification. There are 10 different kits to choose from to suit different needs. The physical layer uses UART to RS485 communication interface, baud rate is 9600, 8 data bits, 2 stop bits, no parity. The application layer uses ModbusRTU protocol to communicate, only supports function codes such as 0x03, 0x04,0x06, 0x41, 0x42, etc. Voltage threshold can be set, divided into high and low voltage threshold, when the measured voltage exceeds the threshold, it can trigger an alarm. Specification: Brand: PEACE! Model: PZEM-017 Tension: Measuring range: 0.05-300V (when the test voltage is ＜ 7V, please use the independent power mode) Resolution: 0.01V Measurement accuracy: 1% Current: Measurement range: 0.02-300A (can be matched with four kinds of shunts 50A, 100A, 200A, 300A) Resolution: 0.01A Measurement accuracy: 1% Power: Measuring range: 0.2-90 kW Resolution: 0.1W Measurement accuracy: 1% Energy consumption: Measuring range: 0-9999kWh Resolution: 1Wh Measurement accuracy: 1% Reset Energy: Use software to reset Over Voltage Alarm: Default high voltage threshold: 300V Default low voltage threshold: 7V Communication interface: RS485 interface Working temperature: -20~60℃ Product Size: Approx. 9 * 6 * 2.3cm / 3.5 * 2.4 * 0.9 inch Weight: Approx. 77g ~ 287g / 2.7oz ~ 10.1oz Register address Description Resolution 0x0000 1LSB voltage value corresponds to 0.01V 0x0001 1LSB current value corresponds to 0.01A 0x0002 Low power value 16 bits 1LSB corresponds to 0.1W 0x0003 High power value 16 bits 0x0004 Low energy value 16 bits 1LSB corresponds to 1Wh 0x0005 High energy value 16 bits 0x0006 High voltage alarm condition 0xFFFF is an alarm, 0x0000 is not an alarm 0x0007 Low voltage alarm condition 0xFFFF is an alarm, 0x0000 is not an alarm Register address Description Resolution 0x0000 High voltage alarm threshold (5 ~ 350V), default 300V 1LSB corresponds to 0.01V 0x0001 Low voltage alarm threshold （1 ~ 350V）, by default 7V 1LSB corresponds to 0.01V 0x0002 Modbus-RTU Address The range is 0x0001 ~ 0x00F7 0x0003 Current range 0x0000: 100A 0x0001: 50A 0x0002: 200A 0x0003: 300A Optional Kit # 1 1 x DC consumption meter # 2 1 x DC consumption meter 1 x RS485 to USB No. 3 cable 1 x DC consumption meter 1 x 50A # 4 shunt 1 x DC consumption meter 1 x 100A # 5 shunt 1 x DC consumption meter 1 x 200A shunt # 6 1 x DC consumption meter 1 x shunt 300A # 7 1 x DC consumption meter 1 x RS485 to USB cable 1 x 50A # 8 shunt 1 x DC consumption meter 1 x RS485 to USB cable 1 x 100A shunt # 9 1 x DC consumption meter 1 x RS485 to USB cable 1 x 200A shunt # 10 1 x DC consumption meter 1 x RS485 to USB cable 1 x 300A shunt Note: The RS485 interface is a passive output, it requires an external 5V power supply connection, and the external power supply should be ＞ 100mA. When the input test voltage is less than 7V, it must supply 5V independent working voltage through the USB port. DO NOT use the USB port provided by the computer as an independent power source, otherwise it may damage the computer.