Wiring Instructions: Voltage power input can be 10~30V. When wiring the 485 signal cable, pay attention to the A/B polarity. The two wires must not be connected in reverse. The addresses between multiple devices on the bus must not conflict. The switch type device comes standard with 1 relay output, and the two outgoing wires (green and white) are normally open contacts. Alarm Reset Delay Setting D: If this value is set to 10 seconds, the device will output an alarm state only if rain and snow are detected for more than 10 seconds. If the detection duration is less than 10 seconds, the device will not trigger an alarm. When conditions return to normal, the same logic applies. Default: 1 second. Range: 0–60000 seconds. Sensitivity Setting: The sensitivity value is inversely proportional to the actual sensitivity. A higher setting value results in lower sensitivity, while a lower value increases sensitivity. However, setting the sensitivity too low may lead to false alarms. It is recommended to use the factory default value. Default: 800. Range: 500–3500. IP68 protection grade design allows long-term outdoor operation, easy to use, suitable for various harsh environments. Heating temperature should be controlled within 40°C (default) to prevent dry burning and extend service life. Sensor sensitivity is adjustable for flexible use. Alarm and reset delay settings help avoid frequent alarms on site. Optional automatic heating function supports snow detection and prevents icing and condensation in environments with prolonged temperatures below 0°C and high humidity. Widely applicable in greenhouses, aquaculture, construction, buildings, and other environments requiring qualitative rain and snow detection. Safe, reliable, sleek design, easy installation. Specifications: Condition: Item Type: Rain Snow Sensor Material: Polyester Plastics Color: As shown in picture Size: Approx. 9x6x4cm / 3.5x2.4x1.6in Weight: Approx. 161g / 5.7oz Power Supply: 10–30V DC Normal Working Power: 0.4W Storage Environment: -40°C to 80°C Working Power When Heating: 2.4W Output Signal: 485, Relay Parameter Configuration: Software settings Default Modbus Address: 01 Support Function Code: 03, 06 Heating Start Ambient Temperature: Default 0°C