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what is the difference between cold loop and hot loop

Answers were Sorted based on User's Feedback

what is the difference between cold loop and hot loop..

Answer / nirmal

cold loop means you still have no any power source
connected on the loop

hot loop means power supply is present on the loop

Is This Answer Correct ?    22 Yes 1 No

what is the difference between cold loop and hot loop..

Answer / raja

SIS instrument LOOP is hot LOOP.
Other normal instrument all is Cold loop

SIS Mean Safety Intergartive System

Is This Answer Correct ?    9 Yes 7 No

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