Â Consider the following inputs and outputs associated with a DCS system. It is interesting to...

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Electrical Engineering

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Consider the following inputs and outputs associated with a DCS system. It is interesting to note that EXACTLY the same could be applicable to a SCADA system (although the SCADA system could use either a dedicated RTU or else a PLC).
Break the following signals up (either going to, or away from the RTU-type devices) and indicate which are:
i) digital inputs, ii) digital outputs, iii) analog inputs and iv) analog outputs:
18.1 ( 1 mark) START signal
18.2
( 1 mark)
Speed control signal of a VSD (going to the VSD â€“ Please think in terms of a SPEED UP button and a SLOW DOWN button).
18.3( 1 mark) An I/P (current to pressure) transducer for a butterfly valve (going to the valve).
18.4( 1 mark) Solenoid Valve (operating something in the field).
18.5( 1 mark) A light.
18.6( 1 mark) An electric motorâ€™s contactor (which will be used to start a motor in the field)
18.7( 1 mark) An RTD temperature probe.
Note â€“ This question is mandatory. It should be answered and students are expected to get this question completely right to be assessed as competent with a score for this module.

Answer & Explanation Solved by verified expert

4.2 Ratings (674 Votes)

Solution The following signals can be categorized as either digital input output or Analog Inputoutput based on the type of signal applied 181 START signal is a digital input to the DCS See Answer

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