9 Electric and electronic connecting and installing apparatus and systems composed thereof, namely, cable entry supports, push-in terminals, screw terminals, terminal strips, printed circuit board plug-in connectors, heavy duty connectors, distributor housings, receptacle housings, connector housings, support-rail-mounted housings, cable ties, conductor and terminal labeling and marking machines, junction box terminals, as well as electronic components, namely, solid state relays, field bus connectors, and electronic modules, namely, analog and digital signal processors, low-voltage power supplies, signal amplifiers, data interface devices, as far as included in this class; electric fitting systems being composed of flat cables and round cables as well as cable forms for transmitting energy and data; installation components for electric apparatus included in this class, namely, protective housings with and without integrated electric distributor and electronic couplings; electric control and supply units, namely, sensor-actuator-interface distributors, current supplies, repeaters, gateways, wireless input output expansion units, interface units, field bus distributors; protective and coupling devices for energy distribution, namely, electric and electronic fuses, solenoids, switching devices, namely, Industrial Ethernet switches, media converters, electric relays and modules, namely, surge protectors for over voltage protection