Brushless motor controllers usually have only two positive and negative leads. The general red line is the motor positive pole, the black line is the motor negative plate; if the positive pole negative pole switch wiring, will only make the motor reversal, generally does not damage the electric machinery. But the rotor of the brush motor controller is the coil, so carbon brush should be installed.

The Hall components of the brushless motor have five lead wires, which are the common power cathode of the hall element, the negative pole of the common power supply, the A phase Hall output, the B phase Hall output, and the C phase Hall output. Because the brushless motor is a three phase motor with the magnetic cylinder as the rotor, without carbon brush, but needs to install Holzer sensor to identify the phase, so the brushless controller has three electrical and five Holzer sensing circuit lines connected with the motor.