Feature

●【Measure Whether】Rain and snow sensor is a qualitative measuring device, which is used to measure whether it rains or snows outdoors or in the nature.
●【Safe and Sensitive】The rain and snow sensor is safe, reliable, beautiful and easy to install. The sensitivity of the sensor is adjustable for more flexible use.
●【AC Measurement Technology】The unique AC measurement technology prevents the oxidation reaction of the sensing plate and ensures long term sensitivity.
●【Automatic Heating】The automatic heating function can be used for snow detection to prevent freezing and condensation when the temperature is lower than 0 ℃ for a long time and the humidity is high.
●【Heating Temperature Range】The temperature during heating shall be strictly controlled within 40 ° C (default value) to prevent excessive oxidation caused by dry burning and prolong the service life.


Description

Specification:
Item Type: Rain and Snow Transmitter
Material: Plastic
Color: Gray
Weight: Approx. 153g / 5.4oz
Power Supply: 10~30V DC
Normal Working Power: 0.4W
Storage Environment: -40℃~80℃
Output Signal: 485
Relay Parameter Configuration: Software Setting
Default Address: 01
Support Function Code: 03, 06
Maximum Heating Temperature: 40 ℃ (Default)
Load Capacity Output Relay: 250V AC 1A, 30V DC 1A
Product Size: Approx. 89x64x38mm / 3.5x2.5x1.5in

Description of Alarm Reset Delay Setting
Default value: 1 second
Range: 0~60000 seconds
Sensitivity Setting Description
The sensitivity value is inversely proportional to the actual sensitivity. That is, the larger the setting value is, the less sensitive the equipment is to detect, and the smaller the sensitivity value is, the more sensitive the equipment is to detect. However, it should be noted that the sensitivity value is too small, which is easy to cause false alarms. It is recommended to use the factory default value.
Default value: 800
Range: 500-3500
Data frame format definition
RTU communication protocol is adopted, and the format is as follows:
Time of initial structure ≥ 4 bytes
Address code=1 byte
Function code=1 byte
Data area=N bytes
Error check=16 bit CRC code
Time to end structure ≥ 4 bytes
Address code: the address of the transmitter, which is unique in the communication network (factory default 0x01).
Function code: the instruction function indication sent by the host. This transmitter only uses function codes 0x03 and 0x06.
Data area: The data area is specific communication data. Note that the high byte of 16bits data comes first!
CRC code: two byte check code.

Package List:
5 x Expansion Plugs
5 x Tapping Screws
1 x Sensor 
1 x Manual