Product Details
Product features:
1. High precision and fast response
2. The newly upgraded row pin pulse version is more suitable for integrated use of PCB, which is convenient for measuring power and calibration error
3. Physical layer protocol: The physical layer uses UART to TTL communication interface. Baud rate is 9600, 8 data bits, 1 stop bit, no check,
4. Application layer protocol: The application layer uses Modbus-RTU protocol for communication. At present, it only supports 0x03 (read hold register), 0x04 (read input register), 0x06 (write single register), 0x41 (calibration), 0x42 (power reset) and other function codes. The 0x41 function code is only for internal use (the address can only be 0xF8). It is used for factory calibration and return to the factory for maintenance and other occasions. The password with 16 digits added after the function code is 0x3721 by default. The address range of the slave is 0x01~0xF7, and the address 0x00 is used as the broadcast address. The slave does not need to reply to the host, and the address OxF8 is used as the general address. This address can only be used in the environment of a single slave, and can be used as the calibration address
5. CRC verification: CRC verification uses 16bits format, takes two bytes, and generates a polynomial of X16+X15+X2+1. The polynomial value used for calculation is 0xA001. The value of CRC verification is all byte verification results of a frame of data except the CRC verification value.
6. Calibration function
7. Electric energy reset function
8. Read and modify slave parameters
Product parameters:
Product model: PZEM-004T-100A-D-P
Measuring range: 100A
Voltage: 80~260V
Current: 0~100A
Active power: 0~2.3KW
Power factor: 0.00~1.00
Frequency: 45Hz~65Hz
Active electric energy (electric energy reset software reset): 0~9999.99kWh
Power overrun alarm: the active power threshold can be set. When the measured active power exceeds the set threshold, the alarm status will be set
Pulse output: 1600 imp/kwh
Communication interface: TTL interface
Power supply: single-phase power frequency grid power supply supplies power to the main circuit through resistance and capacitance voltage reduction. TTL output communication interface is isolated from the optocoupler of the main circuit, which is passive output. External 5V power supply is required for communication
Working temperature: - 20 ℃~+60 ℃
Special notes:
The TTL interface of this module is a passive interface, and 5V power supply must be provided externally, that is, all four ports must be connected (5V, RX, TX, GND) during communication, otherwise communication cannot be conducted. Working temperature: - 20 ℃~+60 ℃
Package list:
PZEM-004T-100A-D-P module * 1
PZEM-004T-100A-D-P module * 1+close CT * 1
PZEM-004T-100A-D-P module * 1+open CT * 1
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