what is the difference between 2 wire and 3 wire RTD- application wise,cost effectivity?

2 Answers  

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what master plc do?

2 Answers   ISRO, Yokogawa,

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What is the difference between dry contact and wet contact?

2 Answers  

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Hi friends, from Aug 4th onwards iam getting spikes for analog inputs in our DCS for a period of 800ms. I throughly checked every thing, finally i found that the DI, DO's from MCC panels shields are terminated in the Signal Earth where Analog Input signals shields are terminated. Is there any problem with this type of termination?. i checked the induction voltage from MCC and getting around 25VAC, please suggest me in this concern. Our plant is 8months old only. DCS is Siemens Make Simatic PCS7, and the transmitters are Yokogawa make.

1 Answers  

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1.what is the role of proportional comtroller in pid controller?2.How do u calibrate the control valve?

3 Answers   Bently, IOCL,

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what is Potential free contact? where it is used?

3 Answers   Engineers India Limited,

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How to connect field devices to PLC and DCS using a FIELD BUS, DP,MOD BUS(please tell me any extra interfce or adopters need in this case if we use remote i/o s)

3 Answers  

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what are the programming languages used in dcs

7 Answers  

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Explain the difference between the types of input variables plc?

1 Answers  

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how to calculate interface capelary level transmetar lower S.G.0.54 and uper S.G. 0.26 and h=490 mm

3 Answers  

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what does it mean an active front end in vfd plz explain it briefly

0 Answers  

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what do you mean by cathodic protection?

1 Answers   Saipem,

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