Key attributes

Motor Compatibility

• Power Rating: The control box is designed to be compatible with fans of different power ratings. For small - scale applications, it can control fans with a power of a few hundred watts, while for industrial or large - scale ventilation systems, it can handle fans with power ratings up to several kilowatts.
• Motor Type: It can be used with different types of motors, such as induction motors and permanent - magnet motors. The control box should be able to provide the appropriate electrical signals and control logic to ensure proper operation of the motor at both speeds.

Two - Speed Operation

• Speed Settings: The control box allows the fan to operate at two distinct speeds. The low - speed setting is usually around 30% - 60% of the high - speed setting. For example, if the high - speed is 1500 RPM (revolutions per minute), the low - speed may be set at 600 - 900 RPM.
• Speed Regulation Accuracy: The accuracy of speed regulation is an important parameter. It is typically within ± 1% - ± 3% of the set speed. This ensures that the fan operates at a stable speed at both the low - speed and high - speed settings.

Intelligent Control Parameters

Sensor Integration

• Temperature Sensors: If the control box is equipped with temperature sensors, the temperature measurement range is usually from - 20°C to 80°C, with an accuracy of ± 0.5°C - ± 1°C. The control box can use the temperature data to automatically switch between the two fan speeds. For example, when the temperature exceeds a pre - set high threshold, it switches the fan to high - speed; when the temperature drops below a low threshold, it switches to low - speed.
• Humidity Sensors: For control boxes with humidity sensors, the humidity measurement range is typically from 0% - 100% relative humidity, with an accuracy of ± 3% - ± 5%. Similar to temperature control, the fan speed can be adjusted based on the humidity level.

Programmability

• Set - point Adjustment: Users can adjust various set - points, such as the temperature or humidity thresholds for speed switching, the duration of operation at each speed, and the time intervals for automatic control. The set - points can usually be adjusted with a resolution of 0.1°C for temperature and 1% for humidity.
• Control Logic Programming: Some advanced two - speed intelligent fan control boxes support programming of more complex control logic. This may include multi - stage speed control based on multiple environmental parameters, or time - based scheduling of fan operation.

Self - Diagnosis and Fault Detection

• Fault Detection Range: The control box can detect a variety of faults, including motor over - current, over - temperature, sensor malfunctions, and abnormal electrical connections.
• Alarm Output: When a fault is detected, the control box can provide an alarm output. This can be in the form of a visual indicator (such as an LED light) on the control box panel or an electrical signal that can be sent to a remote monitoring system.