WHD20R-22 Din Rail Mounted Temperature & Humidity Controller
General
WHD series smart temperature and humidity controller is suitable for adjustment and control of temperature and humidity in equipments of high voltage switchgear, terminal box, ring network panel, box transformer substation etc. It can effectively protect relevant equipment from faults resulting from excessive low or high temperature, creepage or flashover etc.from humidity or condensation.
Functions
Technical Datasheet
| Technical Parameter | Value | |
| Measuring Range | Temperature | -40.0℃~99.9℃ |
| Humidity | 0%RH~99%RH | |
| Precision | Temperature | ±1℃ |
| Humidity | ±5%RH | |
| Transmitting Output | DC 4-20mA or DC 0~20mA | |
| Set range of controlling parameter | Heating for Temperature rising | -40.0℃~40.0℃ |
| Blowing for temperature decreasing | 0.0℃~99.9℃ | |
| Humidity control | 20%RH~90%RH | |
| Output Contact Capacity | 5A/AC250V | |
| Start/stop gap | 5 | |
| Communication port | RS485,MODBUS(RTU) treaty | |
| Auxiliary Power | Voltage | AC/DC 85-265V |
| Consumption | Basic power consumption(≤0.8w)+relay power consumption(each channel≤0.7w) | |
| Insulation Resistanced | ≥100MΩ | |
| Power-frequency withstand voltage | power with shell,touchable metal parts/power with other terminal group 2kV/1 min(AC.RMS) | |
| Average work time without stoppage | ≥50000 hours | |
| Working condition(controller) | Temperature | -20℃~+60℃ |
| Humidity | ≤95%RH,without condensation and corrosive gas | |
| Altitude | ≤2500m | |
Dimension
Wiring
Typical Connection
FAQ
Q: Connect users between the sensor and the controller,Can it be matched?How long is the length in meters?
A: The user can wire,but it is required to use a 4-core shielded wire,and a 2.5-meter shielded wire is attached to the factory.The longest distance between the sesor and the controller is 20 meters.
Q: Can WHD Switch control manually and automatically?
A: Yes,but be sure to explain to the customer service before placing an order,it is an unnormal operation.
Q: User have their own sensor,can they buy a controller?
A: No,the sensor and controller need to be used together,2 device can not sold seperately.
Package
ATTENTION !
The above packing and weight data are only refer to model WHD20R-22.
For other models or optional functions, please contact the salesman for details, thank you for your cooperation!
