the SL8305 three-phase variable frequency fan controller is suitable for the application of controlling the speed of the fan. It can carry 1 to 2 fans with a total power of not more than 2.2KW. the control mode can be controlled by pressure, 010V proportional signal, and communication. In addition, there is a fan overload protection point input On-board digital tube, display status and fault information.

There is a two-digit digital tube on the control board, as shown in the figure below: