Explain the difference between the types of input variables plc?

1 Answers  

---

what are the standards used for earthing instruments in the field?

1 Answers  

---

what are the steps I have to deal with?

0 Answers   ONGC,

---

What is the working principle of oxygen analyzers(zirconium oxide type) used in CFBC boilers?

3 Answers   Bajaj, Kohinoor, Wartsila,

---

what is the difference between Feedback controller and Feed forward controller. and when it is to be used.

3 Answers  

---

please send me some question papers of HPCL aptitude test ?? please send it to bipinb.28@gmail.com ...

0 Answers   HPCL,

---

what is unit and element of viberation?

1 Answers   Kentz, KOC,

---

How digital input and digital output 's are working in dcs

0 Answers   BBV, Indiabulls,

---

What is scale factor of proximitor & unit of the viabration.

2 Answers   Sabic,

---

can we connect instrument earth pit to electrical earth pit, if not why?

2 Answers  

---

how to relay switch sense the fault?

0 Answers   ME,

---

what is 24vdc live and dry supply

0 Answers  

---