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Provides symbols for binary operating functions. Intended to symbolize the binary operating functions of a system in a manner that can be applied to any class of hardware, whether electronic, electrical, fluidic, pneumatic, hydraulic, mechanical, manual, optical, or other. The purpose of this Standard is to provide a method of logic diagramming of binary interlock and sequencing systems for the startup, operation, alarm, and shutdown of equipment and processes in the chemical, petroleum, power generation, air conditioning, metal refining, and numerous other industries.The Standard is intended to facilitate the understanding of the operation of binary systems, and to improve communications among technical, management, design, operating, and maintenance personnel concerned with the systems.
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