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hello everyone myself
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batw in this course I will discuss about
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signals these are the foundation for the
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BCS electrical electronic
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Engineers are anyone dealing with these
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4 to 20 millium current
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signals see in Industries we have many
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instruments they may be input
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instruments or output
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instruments these will measure the
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meters and update these signals to the
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room that means these will send the
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signals to the controllers like PLC
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controllers what these instruments do
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is they will measure the respective
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parameter and they have to send this
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measured parameter value to the control
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room in any industry it may be a power
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industry manufacturing
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instruments for measure M
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purpose and for control
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here the first one from the left side
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this is flow transmitter
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ft okay this instrument measures the
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pipeline and then it has to send the
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plc similarly the second instrument this
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is TT that means temperature
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transmitter this instrument measures the
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temperature and it has to send the
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PLC and the third one also temperature
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transmitter like this in Industries we
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instruments there may be different type
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instruments under each
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category for example in flow
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transmitters we have different
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principles and models
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available like that every category
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pressure temperature flow Etc they may
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have different types of
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instruments what's their role is they
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have to measure the respective process p
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parameter and they have to update the
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PLC and these we will call it as input
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example the PLC or operator has to
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control the flow rate of a
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pipeline then we need control
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walls if you see here this is a big
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wall the control wall controls the flow
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pipeline depends on the PLC
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command the Vol will operate it may be
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fully closed or fully open or partially
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open depend depends on the command it
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PLC so the PLC has to receive the inputs
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transmitters and it will process the
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logic and then sends the final command
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to the control Vol okay there may be
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of final control element like control
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walls variable frequency drives motor
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so in any case whenever there is a
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involved then the PLC has to deal with
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signals it may be analog input or analog
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output the 4 to 20 million is a industry
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signals there are other signals also
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available but these signals
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are very bold and everywhere available
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in this course we will learn about these
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disadvantages why we selected this
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particular range for example why it is
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started from 4 and why it is ended at
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20 in the next video I will discuss
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workstations like operator workstation
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or engineering workstation related
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Graphics I will meet you in the next
