Answer / rajkumar

4-20 ma

Answer / shakeel221

4~20 mA, 1~5 v,

Answer / mithlesh

All Instruments uses 4-20 mA output signal to indicate the process variables in all mean called direct or inferential.

Answer / masters

voltage maybe

in DCS or PLC we can not put all ai or di,there is calculation through which we can accomodate certain no of digital and analog signal.I need to know that calculation

1 Answers  

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where can i find a flameproof hmi unit?

1 Answers  

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Can anyone convert a 5/2 way or 3/2 way valve into an ISO valve?

0 Answers  

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pls any1 sugges me book for plc,dcs & scada..

1 Answers  

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why the positioner output is 3-15psi

5 Answers  

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What is surge in compressors? How to detect and control it?

1 Answers   DEWA,

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Q- Ordinary Water Tap is which kind of controller ? P , PI or PID i chose the option of ON - OFF type controller but ambiguity is that for different positioning of tap we get different flow

1 Answers  

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why gray colour is choosing to all instrument panel.why not choosing other colour?

1 Answers   Reliance,

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1. For Steam drum level signal, why do we compensate with drum pressure signal? 2.For main steam Flow signal is comensated with main steam temperature signal and main steam pressure signal why?

0 Answers  

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Pls.could any one Clarify the following with an example. 1.At What condition Close on Rise and Close on Fall Pressure Switch contacts are used. 2.If Pressure is abnormal as per set pressure,if connecting Terminal of pressure switch breaks,how the voltage extends to Relay base. 3.Are these contacts come under fail safe philasaphy.

1 Answers  

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What is the diffrence between ff tx and non ff tx

0 Answers   Jindal, Rosemount,

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our kks tagging is crossing more than 12 character please suggest how to take tags in the DCS

0 Answers  

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