Space-saving installation due to a slim design of 6.2 mm. Signal indication without additional auxiliary power thanks to a mechanical status display. An optional remote signaling module monitors up to 40 items without additional wiring. No signal disruption during maintenance work due to impedance-neutral plugging and unplugging of the protective plugs. Error-free replacement of protective plugs is ensured by coding. A simple interruption of signal circuits for maintenance is facilitated by vertical knife separation. Safe operation in case of overload is guaranteed by an integrated disconnector. Worldwide use in hazardous areas is supported by ATEX and IECEx approvals.