What is passive connection of instrument in different type
of I/O module



What is passive connection of instrument in different type of I/O module..

Answer / carl_ellis

What is passive connection of instrument in different type of I/O module?

What is passive connection of instrument in different type of I/O module?

The output of a field instrument or analyzer that makes a measurement and provides a conditioned, high level signal like 4-20mA is characterized as either active or passive.

An active output is powered internally by the instrument. These are 3 or 4 wire instruments with a separate power wire or wires.

A passive output requires a DC power supply in series with its output in order to excite or power the output. This done to
- limit field wiring to 2 wires
- reduce the likelihood of a ground loop due to difference in ground potential between the field instrument and the receiver.

So, a connection of a passive (2 wire, loop powered) device has to include connections to a DC power supply, observing correct polarity at the field device and the receiver's analog input.

Carl Ellis
Measure First

Is This Answer Correct ?    0 Yes 0 No

Post New Answer

More Instrumentation Interview Questions

Valve positioner and actuators in detail.

0 Answers   MIEPL,


Which type of diagphram use in costic line,DM water line,natural gas line,oil line?

0 Answers   Hindustan Zinc,


What is the role of P(Protional), I(Integral) and D (Derivative) in PID Controller?

9 Answers  


why used three wire in RTD.

8 Answers   BARC,


What are the reliability data ,like failure rate etc,for bently nevada systems & vibration probes.

1 Answers  






A length of steel pipe is used to carry sea water to a desalination plant. An adequate corrosion allowance must be specified and indicated in the piping specification, which affects the _________________________ of the pipe

0 Answers  


Meaning of the following a. IOP- Manimum; b. IOP- Maximu,;

0 Answers  


what is the meaning if the control valve CV is 27,in terms of selecting procedure?

2 Answers  


How a oxygen sensor & analyzer work at boiler or furnace, what’s the principle & science is beyond this, How O2 sensor scene & convert signal & move toward analyzer & analyzer show reading in percent?

1 Answers   GS Engineering Construction, KNIC,


any questions on motor and energy conversions machines?

0 Answers   ABB,


Lux meter is the measuring device to measure the lux level of lighting fixture. in industrial sector two types of lighting fixture is being used as street lighting purpose 1. HPSV (Sodium) and 2. HPMV (Mercury). HPMV having white light which is an combination of red, blue and yellow colour, while HPSV haivng Yellow lighting. in HPSV red & blue colour will be absent. during measurement of the lux level of HPSV and HPMV fixture. 1. Lux meter can measure the actual lux level of both fixture? 2. or it will show false reading for HPSV fixture light as it has only yellow light present. please give me answer

0 Answers   Ace Info,


hello sir/madam, I,Subramanian need 5yrs placement papers of officer trainee of Instrumentation technology.pls send to this mail id mani_nxtgen@yahoo.co.in please do the needful. with regards, subramanian.v

0 Answers  


Categories
  • Civil Engineering Interview Questions Civil Engineering (5085)
  • Mechanical Engineering Interview Questions Mechanical Engineering (4451)
  • Electrical Engineering Interview Questions Electrical Engineering (16632)
  • Electronics Communications Interview Questions Electronics Communications (3918)
  • Chemical Engineering Interview Questions Chemical Engineering (1095)
  • Aeronautical Engineering Interview Questions Aeronautical Engineering (239)
  • Bio Engineering Interview Questions Bio Engineering (96)
  • Metallurgy Interview Questions Metallurgy (361)
  • Industrial Engineering Interview Questions Industrial Engineering (259)
  • Instrumentation Interview Questions Instrumentation (3014)
  • Automobile Engineering Interview Questions Automobile Engineering (332)
  • Mechatronics Engineering Interview Questions Mechatronics Engineering (97)
  • Marine Engineering Interview Questions Marine Engineering (124)
  • Power Plant Engineering Interview Questions Power Plant Engineering (172)
  • Textile Engineering Interview Questions Textile Engineering (575)
  • Production Engineering Interview Questions Production Engineering (25)
  • Satellite Systems Engineering Interview Questions Satellite Systems Engineering (106)
  • Engineering AllOther Interview Questions Engineering AllOther (1379)