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  1. PLCs, VFDs, Motors and Controls
    I've got an ac/dc power supply on a Plc that is a class one 24 volt power supply , my doors are to be powered by a class two power supply only , the fuses powering my doors would prevent my doors from ever exceeding class two va requirements . I have class two plenum cable pulled . The company...
  2. PLCs, VFDs, Motors and Controls
    I started a new job working in a paper mill and have been given the chance to learn ladder logic. Can anyone give me info on where I can find books and possible software to play around with?
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