The Beckhoff I/O system encompasses a large number of signals and functions. The extensive range of products is rounded off by the system terminals with further functionalities: Power feed terminals for fieldbus and E-bus power supply; surge filter terminals to protect the I/O station against cable-bound surge voltages; overcurrent protection terminals for reliable protection against 24 V DC overcurrents; potential distribution terminals for the distribution of load or field potentials as well as power supply terminals for generating output voltages from 5 V to 30 V DC with the ASi power supply terminal.