PLC vs VFD Control Panels

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PLC Control Panels

PLCs are industrial computers that connect and monitor input devices such as switches, sensors, pushbuttons, and relays. Based on the state of an input device, the PLC can execute programmed outputs such as sound an alarm, open or close a valve, or stop or start a motor.

A PLC control panel is simply an enclosure that houses the PLC and the necessary components to distribute power, carry out programmed outputs, and protect the electrical circuits. Additionally, a PLC control panel may contain an ethernet switch for connecting the PLC to a network, external computer, or HMI.

VFD Control Panels

VFDs are a type of motor controller used to control motor speed by varying the input of frequency and voltage. VFDs can also control motor ramp-up and ramp-down during the act of starting or stopping the motor. VFDs provide numerous advantages, including improved system efficiency, reduced energy consumption, matching the speed and torque of the motor to the process requirements, and reducing the mechanical stress on a machine.

A VFD control panel can consist of a single or multiple VFDs, as well as power distribution components, circuit protection and motor protection devices, line reactors or harmonic filters, motor starters, and a PLC.

Regardless of the type of VFD you are looking for, ECI can help with your next project. Contact us to learn more.