Answer / niranjan

Fieldbus (or field bus) is the name of a family of industrial computer network protocols used for real-time distributed control, now standardized as IEC 61158.
PROFIBUS (Process Field Bus) is a standard for field bus communication in automation technology.
The Profibus in his Process versión (Profibus PA) is two wire (Twisted pair) for data and power.
fieldbus foundation is only for process (Mainly for instruments), Profibus is for process and automation (instruments, drives, I/O, motor controllers to PLC, PLC to PLC etc.).

Any body have know try work calculation ???

0 Answers  

---

which type of zones used for boiler? & why ?

0 Answers  

---

selection criteria of control valve? and selection criteria of actuator explain in brief?

0 Answers  

---

why is an oxygen sensor used in a boiler stack

2 Answers   HCL,

---

Explain about 4 wire instrument concept & tell about its wiring fron sensor in Field to PLC panel.Explain with an example?

3 Answers   IOCL,

---

Why 4-20 amps is being used in instruments? Why cant we use any other range instead of 4-20 amps? Why only 4 amps is taken as lower limit and why 20 amps is taken as the higher limit?

0 Answers  

---

How u measure the massflow in orifice flow measurement techniques

0 Answers   Johnson Matthey,

---

WHAT IS THE DIFF BETWEEN FREQUENCY AND INTENSITY?HOW IT WORKS IN FLAME SCANNER ?

1 Answers  

---

What is the use of keyphasor in turbine.

7 Answers   Hindustan Zinc, R&D,

---

why we use 250 ohms across HART CALIBRATOR DURING CALIBRATION OF TRANSMITTER

4 Answers  

---

suggest a sensor to measure rapidly varying temperature?

1 Answers  

---

why 4-20 mA signal is preferred over a 0-10V signal

17 Answers   Sofcon,

---