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In most of electrical SCADA systems, RTU (Remote Terminal Unit) panels are very common in power transmission & distribution companies. There are several cards inside each RTU panel, some are binary input/output cards and the others are analogue input/output. I would ask about the function of like these cards? These are some images of that cards: enter image description here enter image description here

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Hi Adban, it is unclear what you're asking exactly. Could you be more specific about your question? – Vitaly Mijiritsky Nov 13 '11 at 9:38
Adban, thanks for updating the question. However, if you're asking about the purpose of these cards, then I'm afraid this isn't the right place. I suggest you try Electronics.Stackexchange. – Vitaly Mijiritsky Nov 13 '11 at 14:28

closed as off topic by Vitaly Mijiritsky Nov 13 '11 at 14:29

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