The Instrument Loop Diagram (ILD)gives the details of the instrument connections / wiring from the field instrument side to the control room side (i.e. system Input/Output (I/O) system card details. For example, instrument loop diagrams from ANSI/ISA S5.4-1991 Instrument Loop Diagrams Standard, can be referred.
ILD Shows the following:
1) The field instrument to the control system (or vice versa)
2) The signal from the control panel to the control system (or vice versa)
3) The signal from the MCC to the control system (or vice versa)
4) The signal from one control system to another
#InstrumentLoopDiagram #LoopDrawing #ILD #Loop
This document shall be used mainly to prepare I&C engineering deliverable/or documents. In other words this documents covers the summary of specific requirements listed for ready reference as Selection or Sizing guide while performing Detail Engineering Activities.
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