Features: 1It's wall-mounted designed will bring you much convenience and is very space-saving. 2The rain and snow protection grade is up to IP65 with good air permeability and display function, which can display the current temperature and humidity in real time. 3It is used in agricultural greenhouses, flower cultivation greenhouses, agricultural fields, electronic equipment production lines and other occasion requiring illumination monitoring. 4The output signal type is RS485, which can communicate up to 2000 meters/ 2187yd. 5Using special 485 circuit, 10-30v wide voltage range power supply, can keep the communication stable. Condition: 100% Brand New Item Type: Sensor Material: PVC Protection Grade: IP65 Size: Approx.13 x 11.7 x 4.2cm / 5.1 x 4.6 x 1.7in Weight: Approx. 177g / 6.3oz Wiring Method: Wide voltage power input 10~30V can be. When wiring 485 signal line, note that the two lines A\\B cannot be connected in reverse, and there should be no conflict between multiple devices. Main technical parameters DC Power Supply (Default)DC 10-30V Maximum Power Consumption0.4W Transmitter circuit operating temperature and humidity-40~ 60, 0%RH~80%RH Probe Working Temperature -40~ 120, Default-40~ 80 Probe Working Humidity0%RH-100%RH Temperature Display Resolution0.1 Humidity Display Resolution0.1%RH Temperature and humidity renovate time1s Output SignalRS485 (Modbus protocol) InstallationWall mounted A AccuracyHumidity2%RH(5%RH~95%RH,25) Temperature 0.4(25) B Precision (Default)Humidity3%RH(5%RH~95%RH,25) Temperature 0.5(25) Long-Term StabilityHumidity1%RH/y Temperature 0.1/y Response TimeHumidity4s (1m/s Wind Speed) Temperature 15s(1m/s Wind Speed) Wiring Cable ColorSpecification Power SupplyBrownPower Supply Positive (10~30V DC) BlackPower Supply Negative CommunicationYellow485-A Blue485-B Communication parameters Coding8-bit binary Data bits8 bit Parity check bitNon Stop Bit1 Error CheckCRC (Redundant cyclic code) Baud Rate2400bit/s, 4800bit/s, 9600 bit/s Can be set, Factory default is 4800bit/s Common problems and solutions: The equipment could not be connected to a PLC or computer, there are possible reasons: 1. The computer has multiple COM ports, the selected port is not correct 2. Address error or devices with duplicate address (factory default is 1). 3. Baud rate, calibration method, data bit and stop bit error. 4. 485 is disconnected, or line A and B are connected in reverse 5. Equipment wiring is too long, or too much should be nearby power supply, plus 485 enhancer, at the same time an increase of 120 terminal resistance. 6. USB to 485 driver is not installed or damaged. 7. Equipment damage. Package Included: 1 x Sensor&nbsp1 Bag Accessory (2 x Screw, 2 x Nut)