WHD20R-22 din rail mounted temperature & humidity controller uses sensors to detect the temperature and humidity values in the cabinet, and adjusts the temperature and humidity values by controlling the external fans and heaters, which can effectively prevent equipment failure caused by low temperature and high temperature, as well as creepage and flashover accidents caused by moisture and condensation.
| 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/stopgap | 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 Resistance | ≥100MΩ | |
| Power-frequency withstand voltage | power with shell, touchable metal parts/power with another 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 | |
Each sensor corresponds to two control output contacts (passive), which are respectively connected to a heater and a fan. The heater is used to heat up or dehumidify, and the fan is used to cool down;
Auxiliary functions can include RS485 communication function and alarm output function, both of which can be selected at the same time;
It adopts din rail installation, which is easy to install.
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