electrical circuit components, namely, electrical cordsets and receptacles, cables, cable connectors, jumper circuit connectors, electrical wire terminators, wiring junctions of metal, extension cords and extension cord junction tees for use with multiplexing control systems in industrial applications; computer hardware for open and closed bus networks; electrical and electronic components, namely, intelligent multi-port bus stations, multi-port junction boxes, data trunk cables with molded-on quick disconnects for interconnection of bus nodes, hubs, cable splitters, power monitoring hubs, line isolators, field wirable electrical and cable connectors, singular and multiple industrial inputs and outputs connected to a bus via a gateway coupler, gateways, routers, repeaters, amplifiers, power supply conditioning taps, power and data power surge protectors, field bus receptacles, field bus barriers; and diagnostic hardware for use in connection with bus networks; and electrical and electronic switches and controllers, proximity limit switches, electronic switching amplifiers, time delay electronic relays, amplifier relays, electronic rpm monitors, electronic fluid level monitors, plug-in electronic switching and amplifier modules, inductive electronic terminal connectors and electronic interface modules for electrical insulation of two or more potential voltage levels