An individual PE device or a series of interconnected PE devices {e.g., sensor (e.g., microprocessor based pressure transmitter), programmable electronic logic solver (e.g., PLC, DCS, single loop controller), final element (e.g., microprocessor based valve)] in a plant for the purpose of control, protection or monitoring. (Includes various types of computers, programmable logic controllers, interconnect systems, instrument distributed control system controllers, and other associated equipment). A PE system also typically includes power supplies, peripherals, non-PE sensors and final elements (e.g., motors), data highways and other communication paths.
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