PZEM-004T 100A AC 80-260V Digital Voltmeter Ammeter Wattmeter Digital Multifunctional Test Pulse Communication TTL Serial Module PZEM-004 AC Digital Multifunction Watt Power Volt Amp Current Test Meter Module For Arduino Ammeter Voltmeter 0-100A 80-260V Features: 1. High precision and fast response 2. The new upgraded pin pulse version is more suitable for PCB integration, convenient for power measurement and calibration error 3. Physical layer protocol: The physical layer uses the UART to TTL communication interface. Baud rate 9600,8 data bits, 1 stop bit, no check, 4. Application layer protocol: The application layer uses Modbus-RTU protocol for communication. Currently, only function codes such as 0x03(read hold register), 0x04 (read input register), 0x06 (write a single register), 0x41(calibration), and 0x42 (power zero clearing) are supported. The 0x41 function code is only used internally (the address can only be 0xF8). It is used for factory calibration and returned to factory maintenance. A 16-bit password is added after the function code. The address range of the slave machine is 0x01 to 0xF7. Address 0x00 is used as a broadcast address and the slave machine does not need to reply to the host. Address OxF8 is used as a general address 5.CRC check: CRC check adopts 16bits format and occupies two bytes. The generated polynomial is X16+X15+X2+1. The polynomial value used for calculation is 0xA001. 6. Calibration function 7. Zero clearing function of electric energy 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 to 65Hz Active power (power zero clearing software) : 0~9999.99kWh Power over-limit alarm: the active power threshold can be set. When the measured active power exceeds the set threshold, the alarm state is set Pulse output: 1600imp/kwh Communication interface: TTL interface Power supply: The single-phase power supply in the power grid supplies power to the main circuit through resistance and capacitance step-down. The TTL output communication interface is isolated from the main circuit optically and is a passive output. 5V power supply is required for communication Operating temperature: -20~+60 Special note: The TTL interface of this module is a passive interface and needs 5V external power supply, that is, all four ports (5V, RX, TX, and GND) must be connected during communication; otherwise, communication fails. Operating temperature :-20~+60 Package List: (As you choose) Carton packing PZEM-004T-100A-D-P module *1 PZEM-004T-100A-D-P module *1+ Closed CT*1 PZEM-004T-100A-D-P Module *1+ Open CT*1 _x000D_