Welcome to our store! Better Display: The power monitor module can test current, voltage, active power, power factor, and so on, very practical. Physical Layer Protocol: The physical layer uses the communication interface from UART to TTL. The baud rate is 9600, with 8 data bits, 1 stop bit, and no checksum. Application Layer Protocol: The application layer uses RTU protocol for communication. Currently, only function codes such as 0x03 read holding register, 0x04 reading input register, 0x006 write single register, 0x41 calibration, and 0x42 power reset are supported. The function code 0x41 is for internal use only, the address can only be 0xF8. Default Setting: By default, add a 16-digit password after the function code 0x3721. The slave address range is 0x01~0xF7, and the address 0x00 is used as the broadcast address. The slave does not need to respond to the host and uses the address OxF8 as a universal address. This address can only be used in the environment of a single slave unit and can be used as a calibration address. CRC Verification: CRC verification uses a 16-bit format, takes two bytes, and generates a polynomial of X16+X15+X2+1. The polynomial value used for the calculation is 0xA001. The CRC check value is the result of all byte checks of the data frame, except for the CRC check value. Item Type: Power Meter Module Material: PCB Voltage Measurement Range: 80-260V Voltage Measurement Resolution: 0.1V Voltage Measurement Accuracy: 0.5 % Current Measurement Range: 0-100A Starting Current Measurement: 0.02A Current Measurement Resolution: 0.001A Current Measurement Accuracy: 0.5 % Active Power Measurement Range: 0-23kW Active Power Starting Power: 0.4W Active Power Measurement Resolution: 0.1W Active Power Measurement Display: Display 1 decimal place when < 1000W, for example 999.9W. When ≥ 1000W, only integers are displayed, for example 1000W. Power Factor Measurement Range: 0.00~1.00 Power Factor Measurement Resolution: 0.01 Power Factor Measurement Accuracy: 1 % Frequency Measurement Range: 45Hz~65Hz Frequency Measurement Resolution: 0.1Hz Frequency Measurement Accuracy: 0.5 % Active Energy Measurement Range: 0~9999.99 kWh Active Energy Measurement Resolution: 1Wh Active Energy Measurement Accuracy: 0.5 % Active Energy Measurement Display: When < 10kWh, the display unit is Wh and lkWh=1000Wh, for example 9999Wh. When ≥ 10kWh, the display unit is kWh, for example 9999.99 kWh. Electrical Energy Reset: Software Reset Power Over Limit Alarm: The active power threshold can be set, and when the measured active power exceeds the set threshold, the alarm status will be set. Package List: 1 x Power Meter Module 1 x User Manual 1 x CT Switch Customers are our top priority. If you find any problems with your product after receiving it, such as damage or incorrect quantity, please contact us immediately. We strive to provide you with the best after-sales service.