Wind Speed Sensor Professional High Accuracy 3 Cups Wind Speed Sensor Anemometer for Industry Agriculture 9‑30V Item Type: Wind Speed Sensor Material: ABS Size: Approx. 158x180x70mm / 6.22x7.09x2.76in Weight: Approx. 272g/9.6oz Power Supply Voltage: DC9-30V Telecommunication Type: for RS485 (Default for Modbus Protocol) Measuring Range: 0～70m/s (Pulse, 485, 232 Output) Extension Line Length at Connection: Approx. 0.8m/2.6ft Accuracy: ± (0.5 + 0.02V) m / s (V Represents the Real Time Wind Speed Value) Resolution: 0.1m/s Starting 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℃～60℃, Humidity ≤100 Percent RH Without Condensation Protection Grade: IP64 Widely Used In: Greenhouse, Eco Friendly, Weather observatory, Ships, Docks, Breeding, Advertising Gates, Meteorology, Marine, Environment, Airports, Ports, Laboratories, Agriculture and Transportation and Other Environments of the Wind Speed Measurement. About the sensor telecommunication protocol description : 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 requirement, the default device address in the sensor parameters is 1, baud rate = 9600, protocol for ModBus RTU. Standard for ModBus RTU telecommunication protocols :) Serial 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 telecommunication intervals of at least 500ms or more, CRC in the manual is the parity bit, 2 bytes. The default device address is 1. for Modbus CRC checking 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 final CRC register obtained is the CRC code (the CRC code obtained is low before high). Wiring Method (Wire Sequence Respectively) Wire Color: Output Signal (Rs485) Red: Power Positive Black: A+ Yellow: B- Green: Power Negative Distribution Diameter: Approx. 63mm/2.48in Installation Hole Diameter: Approx. 3.2mm/0.13in Diameter of Aerial Plug: Approx. 15mm/0.59in (It Is Recommended to Reserve 25mm/0.98in for Wiring, First Wiring, Then Installing Fixed Sensors) 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. Analog signal or for RS232, for RS485 output when the meter display value is not correct. It may be due to wiring problems or telecommunication 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.