Apparatus and instruments for conducting, switching, transforming, storing, regulating and controlling electricity; electrical/electronic connection systems and snap-on electronic components (as far as included in this class), namely plug-in card holders, relay sockets, electronic circuits with and without optional housings, plug-in electronic units and printed circuit boards including parts thereof; measuring instruments; electrical/electronic control and regulating apparatus; power supply devices as electronic components; voltage/current and current/voltage converters; sensor systems for machine tools, namely consisting of sensor-actuator interfaces, sensor-actuator distributors, connecting lines and connecting cables for electrical purposes, and field bus components; terminal blocks for electronic/electrical purposes; terminal parts for electrical purposes, namely terminal blocks, terminal strips, connectors and snap-on electronic components; electrical installation material, namely cable ducts and cable trays; accessories for the above-mentioned terminals and terminal parts, namely mounting rails, protective housings, test plugs, sockets, cross-connectors; electrical contact elements for printed circuit boards; ethernet adapters; ethernet switches; ethernet cables; ethernet amplifiers; ethernet controllers; ethernet cards; ethernet hardware; ethernet transceivers; ethernet controllers; signal transmission devices; signal transmission control devices; data transmission apparatus and data storage apparatus; electrical apparatus and electronic components for remote data transmission and remote diagnostics; software and apps related to any of the foregoing goods.