Overvoltage protection and voltage stabilization for Motion Control terminals

This application example describes how Motion Control applications with the output stages for servo, DC and stepper motors by Beckhoff are optimized by the utilization of buffer capacitors. The buffer capacitor terminals EL9570 for EtherCAT and KL9570 for K-Bus stabilize the voltage supply by absorbing the fed back energy and dumping the energy that the buffer capacitor cannot protect against into an external braking resistor. The buffer capacitor terminal protects the DC power supply and other motor terminals that may be sharing the same DC power source. The buffer capacitor terminal extends the area of application for Beckhoff Motion Control terminals to also include applications with short start/stop ramp times and large inertia. Additional installation space in control cabinets is saved due to the solution’s compact design as a double-sized standard terminal block.