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Electric Motor Control Q&A
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Electric Motor Control Q&A
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Electric Motor Control Q&AWhat are the four components of a ladder diagram?
LAP.04 -• Power Supply
• Conductors
• Input Devices
• Output Devices
What are the six basic rules that determine how a ladder diagram is drawn?
LAP.04 -• All Components Labeled
• All Conductors Numbered
• All Lines Numbered
• Control Devices Only
• Only One Load Per Line
• Output Devices Located on Right
Describe how to determine the operation of a circuit given a ladder diagram.
LAP.04 -Left to Right, Top to Bottom.
The best method for reading a ladder diagram is to start at the upper left of
the diagram at the first input on the first line, then work your way across that
line before moving down to the first input on the next line.
Explain how to wire switches to form an AND logic circuit and provide a real-
world application.
LAP.04 -• An AND logic circuit can be made by placing two or more
Normally Open (N.O.) switches wired in series.
• Two-Hand Circuit
Explain how to wire switches to form an OR logic circuit and provide a real-
world application.
LAP.04 -• An OR logic circuit can be formed by two or more Normally Open
(N.O.) switches wired in Parallel.
• Remote start switch for a machine.
Explain how to wire switches to form a NOT logic circuit and provide a real-
world application.
LAP.04 -• NOT logic can be formed by the use of a single Normally Closed
(N.C.) switch.
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