Process Interlocks and Trips
Protective tripping systems provide a defence against excursions beyond the safe operating limits by detecting a excursions beyond set points related to the safe operating limits (i.e. the onset of
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Basics of Permissive and Interlock Circuits
A practical application of switch and relay logic is in control systems where several process conditions have to be met before a piece of equipment is allowed to start. Permissive