The robust switching-mode power units with IP54 protection rating are installed exactly where the protective extra-low voltage is needed, rather than in the switch cabinet, allowing for much shorter cable lengths. The space-saving switching-mode power units in 24 V or 48 V have a 50 percent higher peak output and feature integrated brake chopper, automated power limit and adjustable cable protection. They can also produce an integrated analysis of the status, either via LED or a signal cable to the programmable logic controller (PLC). A switch that can be secured against being turned back on allows maintenance work to be carried out on individual sections of the conveyor while other sections are still in operation.