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Types of Interlocks

S Bharadwaj Reddy
Interlocking is primarily a safety measure, though, the process interlocks used to control the loops or sequence. Interlock Philosophy Interlocking is a method used to maintain safe operating state of...

Basics of Trips, Interlocks, Permissives & Sequences

S Bharadwaj Reddy
This post provides information about basics of Trip, Interlock, Permissive and Sequences which are regularly used in instrumentation control systems like ESD, DCS, PLC etc. Trip: The term Trip refers to an action that...

Process Interlocks and Trips

S Bharadwaj Reddy
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...

Basics of Permissive and Interlock Circuits

S Bharadwaj Reddy
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...

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