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Power Monitoring  Module TTL For AC Voltage Current Power Frequency With CT, Support For Modbus-RTU Standard Protocol

<ul><li>This AC parameter module is mainly used to measure AC voltage, current, active power, frequency, power factor and active energy</li><li>The module has no display function and the data is read through the TTL interface</li><li>Support for Modbus-RTU standard protocol, including host computer software</li><li>Comes with TTL to USB data cable and external CT</li><li>The module works for operating systems</li></ul>

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Specification: Item Type: Module 1. Voltage: Measurement Range: AC 80-260V Resolution: 0.1 V Accuracy:0.5% 2. Current: Measurement Range:0-100A Resolution: 0.001 A Accuracy: 0.5% 3. Active Power Measurement Range:0-2.3 KW Min. Measuring Power: 0.4W Resolution: 0.1W 4. Power Factor Measurement Range: 0.00-1.00 Resolution: 0.01 Accuracy:1% 5. Frequency Range:45 Hz-65 Hz Resolution: 0.1 Hz Accuracy: 0.5% 6. Active Electrical Energy Metering Range:0-9999.99 kWh Resolution: 1Wh Accuracy: 0.5% Protocol: 1. Physical layer protocol: Physical layer adopts UART to TTL interface Baud rate:9600,8 bit data bit,1 bit stop bit, no check 2. Application layer protocol The application layer supports for Modbus-RTU protocol for and currently only supports function codes such as 0x03 read-hold register, 0x04 read-input register, 0x06 write single register, 0x41 calibration, 0x42 power . The 0x41 function code is limited to internal use the address can only be 0xF8, used for factory calibration and back-to-factory maintenance, add a password of 16 bits after the function code, the password default is 0x3721. The address range of the slave computer is 0x01 ~ 0xF7, and the address 0x00 is used as the broadcast address. The slave computer does not need to reply to the host, and the address 0xF8 is used as the general address. The address can only be used in a single-slave environment and can be used for calibration and other operations. 3. Read the results of the measurement The command format for the host to read the result of the measurement is 8 bytes in total: Slave computer address + 0x04 + register address high byte + register address low byte + register number high byte + register number low byte + CRC check high byte + CRC check low byte. Reply of slave computer to the following command format is divided into two types: Correct reply: Slave computer address + 0x04 + bytes + registers 1 data high byte + registers 1 data low byte +...+ CRC check high byte + CRC check low byte. Wrong reply: Slave computer address + 0x84 + code + CRC check high byte + CRC check low byte. The code is read as follows the same below: 0x01, illegal function; 0x02, illegal address; 0x03, illegal data; 0x04, slave error. The register layout of the measured results is shown in the following table: Register address Description Resolution 0x000 Voltage value measurement 1LSB corresponds to 0.1V 0x001 Current Measurement Value Low 16 Bits 1LSB corresponds to 0.01A 0x0002 Current Measurement Value High 16 Bits 0x0003 Power Measurement Value Low 16 Bits 1LSB corresponds to 0.1W 0x0004 Power Measurement Value High 16 Bits 0x0005 Energy Measurement Value Low 16 Bits 1LSB corresponds to 1Wh 0x0006 Energy Measurement Value High 16 Bits 0x0007 Frequency Measurement Value 1LSB corresponds to 0.1Hz 0x0008 Power Factor Measurement Value 1LSB corresponds to 0.01 0x0009 Alarm State 0xFFFF alarm，0x0000 no alarm 4. Read and modify the slave parametersIt supports reading and modifying the address and power alarm settings of the slave machine 5. power 6. Calibration 7. CRC check Package List: 1 x Module<div>1 x Data Cable</div><div>1 x CT</div><div>1 x User Manual</div>

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