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Question
what is the difference between Digital output DO signals /Commands for  
start/stop  and Solenoid valves ??
 Question Submitted By :: Instrumentation
I also faced this Question!!     Answer Posted By  
 
Answer
# 1
DIGITAL OUTPUTS SIGMALS MEANS NO OR NC CONTACTS & DO COMMANDS
MEANS CONTACT CHANGE OVER ALONG WITH VOLTAGE 24 V DC 0R 230 V
AC
 
Is This Answer Correct ?    0 Yes 0 No
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Other Instrumentation Interview Questions
 
  Question Asked @ Answers
 
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What is the working principal of Mass flow transmitter?   1
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As you are fresher in Instrumentation & control engineer.Then why should I select you?   1
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Where are use of pressure,level,flow switches?and what is input and output   3
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