Answer / gagandeep garg

While transmitting the signal the concept of active and
live zero is used.Generally 1V to 5V is standerd signal
range.voltmeter will read 1v when input to the system is
minimum (active zero)and voltmeter will read 0V when wire
is disconnected.Hence troubleshouting becomes easy.

Answer / abdul shukur

Defective Instrument Voltage regulator

Answer / rawjaw

Hello ogagandeep.. Can we
say that it indicates ckt open?

If you SOURCE your outputs from a PLC, would you have to make the output HIGH, or LOW, in order to switch an output ON?

1 Answers  

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what is the difference between AUTOMATION AND INSTRUMENTATION?

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tell about various protocols used in different plcs

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How can we cheak the ENCODER ?

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in DCS or PLC we can not put all ai or di,there is calculation through which we can accomodate certain no of digital and analog signal.I need to know that calculation

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