Wind Speed Monitoring Sensor with 0.8m Cable 3 Blade High Accuracy Anemometer Sensor Wind Speed Sensor DC 5V Item Type: Wind Speed Monitoring Sensor Material: ABS Product Size: Approx. 158x180x70mm / 6.2x7.1x2.8in Supply Voltage: DC5V Communicating Type: RS485 (Default for Modbus Protocol) Measuring Range: Wind Speed 0‑45m/s Extension Line Length At Connection: 0.8 Meters/2.6ft Accuracy: ± (0.5+0.02V) M/s (V Represents The Real Time Wind Speed Value) Resolution: 0.1m/s Start Up Wind Speed: ≤0.8m/s Maximum Power Consumption: 0.48W Load Capacity: DC12V Power Supply, Current Type Output Impedance ≤ 350Ω DC24V Power Supply, Current Type Output Impedance ≤ 900Ω, Voltage Type Output Impedance ≥ 1KΩ Operating Environment: Temperature ‑35℃ to 60℃, Humidity ≤100.0% RH Without Condensation Protecting Grade: IP64 Widely Used In: Greenhouse, Environmental Protecting, Ships, Docks, Breeding, Advertising Gates, Meteorology, Marine, Environment, Airports, Ports, Laboratories, Industry and Agriculture and Transportation and Other Environments of Wind Speed Measurement. Note about the sensor communicating protocol: First, if you are using a single sensor connected to the computer to read data directly, it is recommended e the company's private protocol (see page 3), you can visualize the data in ASCII code (hex send, non hex receive); Second, if you are a multi sensor interconnection with PLC, configuration or programmable collector, it is recommended e the standard for ModBus RTU protocol. Third, if there is no special requirements, the sensor parameters in the device address default 1, baud rate = 9600, the protocol for ModBus RTU. Standard for ModBus RTU protocol: Serial Port Format: Data bit 8 bits, stop bit 1 bit, parity bit None, default baud rate 9600bps, serial debugging software set to hex send and receive, two communicating intervals of at least 500ms or more, CRC in the specification for the parity bit, 2 bytes. The device address is 1 by default. For Modbus CRC checksum steps : 1. Preset the 16 bit register to hexadecimal FFFF, call this register as CRC register; 2. Isolate the first 8 bit data with the lower bit of the CRC register and put the result in the CRC register; 3. Check the lowest bit by shifting the contents of the register one bit to the right (towards the lower bit) and filling the highest bit with a 0; 4. If the lowest bit is 0: repeat step 3 (shift again) if the lowest bit is 1: the CRC register is iso orthogonal to the polynomial A001 (1010 0000 0000 0001); 5. Repeat steps 3 and 4 until it is shifted right 8 times so that the entire 8 bit data is all processed; 6. Repeating steps 2 through 5 for the next 8 bit data; 7. The last CRC register obtained is the CRC code (the CRC code obtained is low before high after). Wiring method (wire sequence respectively): Red: Power positive Black: A+ Yellow: B- Green: Power negative Distribution Diameter: 63mm/2.5in Installation hole diameter: 3.2mm/0.13in Aerial plug diameter: 15mm/0.6in (it is recommended to reserve 25mm/1.0in for easy wiring, first wiring, then install the fixed sensor) Troubleshooting: 1. The wind blade does not rotate properly and has a large hysteresis. There is foreign matter or jammed in the bearing due to long term use. Please send the sensor back to the company for processing; 2. Instrument display value is not correct when RS485 output. Possible wiring problems or communicating serial port failure to obtain the correct data. Please check whether the wiring is correct and firm, whether the serial port is occupied, and whether the serial port setting is correct.