NETWORK 90

Process Control Instrumentation-Namely, Operator Interface Units-Namely, Digital Control Stations, 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 Systems, which Provide Both Modulating and Sequential Control, Data Acquisition, Operator Interface, and Computer Interface for Industrial and Utility Applications