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Why is the cardreader controller and electronic interface connected to building power?

April 26, 2017building cardreader connected controller electronic interface power

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Why is the cardreader controller and electronic interface connected to building power?

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Connecting to building power eliminates the need to require the cardreader controller to be solely powered by batteries. This provides tremendous cost savings in labor and materials (batteries). The building power also keeps the batteries’ trickle charged, adding to their long life span.