Specification: Item Type: Rain and Snow Sensor Material: Plastic Weight: Approx. 153g/5.40oz Size: 89x64x38mm/3.50x2.52x1.50in Power Supply: 10-30V DC Normal Working Power：0.4W Storage Environment：-40℃-80℃ Output Signal: 485 Parameter Configuration: Software setting Default Address: 01 Support Function Code: 03, 06 Maximum Heating Temperature: 40℃ Output Relay With Load Capacity: 250VAC 1A, 30VDC 1A Product Model: RS YUX N01 H Product Type: 485 mode, automatic heating Wire Sequence: VCC(brown) GND(black) A(yellow) B(blue) Ambient Temperature For Heating Start: <15°C (default) Maximum Heating Temperature: 40℃(default) Working Power When Heating：2.4W Package List: 4 x Expansion Plug 4 x Self Tapping Screw1 x Sensor1 x Instruction Note: Features Main Function: The rain and snow sensor is a qualitative measuring device for measuring whether it rains or snows outdoors or in nature. The measurement of rain and snow, the response time is less than or equal to 0.5S. Protection Function: IP68 protection grade design, can work outdoors for a long time. Alarm and reset delay can be set to avoid frequent on site alarms. It is safe and reliable, beautiful in appearance and easy to install. Automatic Heating: Optional automatic heating function can be used for snow detection to prevent freezing and condensation in situations where the temperature is lower than 0 degrees for a long time and high humidity. High Sensitivity: The unique AC measurement technology prevents oxidation reacting of the induction plate and ensures longterm sensitivity. The sensitivity of the sensor is adjustable, making it more flexible to use. Strict Temperature Control: The temperature during heating is strictly controlled within 40 ℃ (default) to prevent over oxidation caused by dry burning and prolong the service life.