what is need of 4 to 20miliampear & 0 to 20miliampear
so many controllers output is of 4 to 20 ma whearas some of them has 0 to 20 ma output why
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arunfbd2012the digital signals work on standard 0-5v , so having a 4-20ma and a 250 ohm resistance we can output a 0-5v range from the controllers.
But if 0-20ma is used, where 0ma for minimum value and if there is a failure in the transmitter wire,say it is grounded then the value read is 0ma again, so to identify this failure Industries now mostly stick to 4-20ma . -
Harshad Italiya
Can you please let me know where you read this ? I mean in datasheet or anywhere else? As I know this 0 might be referred to Input only pin of Controller.ajay mogleso many controllers output is of 4 to 20 ma whearas some of them has 0 to 20 ma output why -
arunfbd2012visit#-Link-Snipped-#
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