What is the detail function of I/O card in DCS ? Why we
dont use the I/O directly with controller?
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- Kekran Mekran, TCE, I also Faced
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Answer Posted / delta_v
Remember that from field instruments the signal sent are only process data (example temperature, pressure); these data can't be read by the controller, hence it will become useless.
That is why IO cards are used to convert these to a readable signal which is 4-20mA.
"You cannot measure, what you cannot control"
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