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    Ladder Logic, PLC Basics

    HI, thanks for the offer to answer a question: When controlling motion of a slow moving (less than 50 cm/sec), track guided car, with a mass that might crush a finger, but not a hand. How should the sensors that detect objects in the way be wired, and how should the logic be diagrammed? Say...
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    NEC code year for the April EE PE exam?

    Does anyone know the NEC code year for the April EE PE exam? tia.
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