what is type of protocol used in instrument field to
marshalling cabinet cabel. what is the differenance between
bus cabel and instrument cabel?
Answer Posted / anas
Typically in the industry, below signal type is used as communication protocol between field devices and marshalling/system cabinet.
Analog signal = 4-20mA, HART protocol for advance application
Digital signal = 0-24V
Alternatively, there is also PROFIBUS and FIELDBUS.
In terms of cabling, instrument cable is a typical 1-2mm copper multicore cable while bus cable refers to application involving PROFIBUS and FIELDBUS.
Is This Answer Correct ? | 0 Yes | 0 No |
Post New Answer View All Answers
Can anyone send most commonley asked Instrumentation questions and answers in cement industry please?
can you provide me full detail about instrumentation in ONGC??
What are de-saturators?
it is possible to check the fail safe condition in pressure transmitter. if possible how?
kindly sent some demo question and answer
what is use of communication wire in multipare cable(oil and gas field), why this communication wire not used in single pair cable?
what is the responsibility of an instrument commissioning supervisor
Hook up resistance decade box to temp.transmitter.
how u choose thermowell lenght n pnumatic C/v size?
how to turbine speed measurement?
Can anyone convert a 5/2 way or 3/2 way valve into an ISO valve?
, Instrument Index, P&ID review, I/O schedule, datasheet, DCS / Analyzers specifications, loop diagrams, hook-up drawings.
Explain bernoulli’s theorem. State its application.
I want to apply for the universities in US,but i got the GRE score of (650+300=950)TOEFL 69/120.Is this score sufficient for applying universities please i am married i need to go to US because my husband didn't get H1 yet.please send me suggestion
Q1: Consider part of a control loop, which excludes the transmitter, consisting of a process, a controller and a control valve which may be represented by two dead times of 0.5 min each and three exponential lags of 0.8 min., 1.0 min. and 1.5 min. respectively. We wish to express this system as an overall first order plus dead time (FOPLD) model ie gain, time constant and process dead time. (We will see later that this is often done, to simplify controller tuning). For this exercise, gain is considered to be 1.0. (A) If the transmitter is a flow transmitter whose behaviour can be described by a dead time of 0.2 min. and an exponential lag of 0.5 min. in terms of the overall dead time and overall first order lag how can the system behaviour be approximated ? Overall dead time = Overall time constant = (B) If the transmitter is a temperature transmitter with a temperature sensor in a protecting well whose behaviour can be described by a dead time of 0.7 min. and an exponential lag of 15 min. how can the overall system behaviour be approximated now? Overall dead time = Overall time constant =