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3. A single-pole normally closed toggle Stop switch is to be wired into Input card 1:1/0, and a normally open momentary Start pushbutton is to be wired into Input card I:1/4. It is a 120Vac input...
QUESTION 1 a. Why is a stop button wired closed, and a start button wired open? b. The inputs to a PLC are a normally closed stop button and a normally open start button. The (2 marks) contacts used in the ladder logic to represent them are both normally open. Why are they both the same? (2 marks) (2 marks) c. Explain the terms contacts and coils with respect to the PLC. d. Explain the terms memory map, assembly language,...