ISA-5.3-1983: Graphic Symbols For Distributed Control/Shared Display Instrumentation, Logic And Computer Systems

The purpose of this standard is to establish documentation for that class of instrumentation consisting of computers, programmable controllers, minicomputers and micro-processor based systems that have shared control, shared display or other interface features. Symbols are provided for interfacing field instrumentation, control room instrumentation and other hardware to the above.

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