EQUIPMENT FOR MEASURING, CONTROLLING AND REGULATING INDUSTRIAL PROCESSES, NAMELY PROCESS INTERFACE UNITS, DATA TRANSMISSION UNITS IN LOCAL AREA NETWORK, ASYNCHRONOUS LINK UNITS, MICROCOMPUTER UNITS AND PROGRAMS THEREFOR, OPERATOR INTERFACE EQUIPMENT COMPRISING CRT DISPLAYS, KEYBOARDS AND CONTROLLERS THEREFOR, POWER SUPPLY UNITS FOR ALL OF THE ABOVE EQUIPMENT, AND CABINETS, RACKS AND SUBRACKS FOR THE INSTALLATION OF PLUG-IN UNITS AND CONNECTING CABLES