Answer / aswin

Mostly we r using F type and G type cable in instrumentation.
F type is individual and overall shielded.G type is over shielded.
Namely divided two type.Signal cable and control cable.signal cable carry 24vdc plus 4-20ma(AI/AO) . But control cable for DI/DO.24V DC,230AC,220 DC.Cable tray root also diff for diff signal.

Single acting ON-OFF valve. it is air to open. when sov energized , valve will be open, so during that if air fail then what will be the condition of valve ( open or close ) ???

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