Almost all electrical machines have their own control system. Motor controllers can differ depending on the functions that these devices perform. When an easy switch is used to connect a motor to an electric outlet, it is frequently a simple flip switch button or knob.

Simple switches are usually operated by hand; however, a sensor connected to contacts or relays can serve as an auto start/stop for the motor. Another switch may provide additional options for selecting specific motor connections. This can include the voltage control, multiple speed, and reverse rotation control during startup.
A smart device in the MCC consists of intelligent devices such as a current module, voltage module, and its controller, which collects motor operating data and transmits it to a PLC or process control system.

Overload, overcurrent, instantaneous overcurrent, locked rotor fault, and phase failure are all reported immediately to the PLC that is linked to the MCC intelligent device. As a result, the security is both quick and reliable.

Furthermore, the PLC can be used to remotely program all motor protection parameters. The computer keeps track of the energy, current, voltage, power, and operating hours.

The running hours data can be used to plan motor maintenance.