73807164
Jun 16, 1989
Feb 27, 1990
[PROCESS CONTROL INSTRUMENTATION - NAMELY, OPERATOR INTERFACE UNITS - NAMELY, DIGITAL CONTROLLERS, CONFIGURATION AND TUNING MODULES, OPERATOR CONSOLES;PROCESS CONTROL UNITS -, namely, CONTROLLER MODULES, LOGIC MASTER MODULES, DIGITAL SLAVE MODULES, ANALOG SLAVE MODULES, ANALOG MASTER MODULES, ANALOG OUTPUT MODULES, CONTROLLER INTERFACE MODULES; ] TERMINATION UNITS FOR COMPUTER INTERFACE AND PROCESS INPUT AND OUTPUT WIRING; [ AND POWER MODULES FOR BOTH MODULATING AND SEQUENTIAL CONTROL, DATA ACQUISITION, OPERATOR INTERFACE, AND COMPUTER INTERFACE FOR INDUSTRIAL AND UTILITY APPLICATIONS; STAND ALONE CONTROLLERS, COMMUNICATIONS INTERFACES, SMART TRANSMITTERS OR MONITORS AND CONFIGURATION ENGINEERING MODULES; LIQUID ANALYSIS EQUIPMENT FOR MONITORING PH, CONDUCTIVITY, SPECIFIC ION, AND OXIDATION REDUCTION POTENTIAL; AND FLAME SCANNERS ]
Electrical and Scientific Apparatus