Space-saving installation due to a narrow design width of 6.2 mm. Signaling without additional auxiliary power thanks to a mechanical status display. An optional remote signaling module monitors up to 40 articles without additional wiring. Fast and tool-free installation of the surge protection devices is made possible by push-in connection technology. There is no interference with the signal during maintenance work thanks to impedance-neutral plugging and unplugging of the protective plugs. Error-free replacement of protective plugs is ensured by coding. Simple interruption of signal circuits for maintenance work is facilitated by vertical blade disconnection. Safe behavior in case of overload is provided by an integrated disconnection device.