The function of the cooling fan signal line

Self-starting function:

When the cooling fan is locked and cannot run, its working current will be cut off automatically, and the cooling fan will run in a low current state, so as to protect the cooling fan from being burned due to high current, and the cooling fan will automatically output a Signal to start the fan when the fan is not locked, the cooling fan will be restarted and run normally.

PWM speed regulation function:

The PWM function can use frequency and high and low voltage levels to control the speed of the cooling fan. The fan speed can be linearly controlled by adjusting the "duty cycle", which can achieve energy-saving and noise-reduction effects.

FG speed measurement function:

This is to output a square wave signal. The main function of this function is to output a square wave signal from the inside of the fan, and the frequency of the signal represents the speed of the fan. That is to say, the speed of the cooling fan can be read by reading the FG signal.

RD alarm function:

This is an open collector function, which is the same hardware function as the FG mentioned above. When the cooling fan is running, the signal pin outputs a low level, and when the rotor is blocked, it outputs a high level. By monitoring the level of the RD signal To judge whether the cooling fan is running normally or locked.

Temperature control function:

When this function is applied, the speed of the cooling fan is controlled by the temperature, and different temperatures can correspond to different speeds. The ambient temperature of the fan is monitored through the thermistor, and the speed of the cooling fan is adjusted appropriately according to the temperature. , to achieve the purpose of energy saving and noise reduction.

Waterproof level:

The waterproof and dustproof level of the cooling fan can be customized according to user needs. Highest waterproof grade IP68.