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Automation : PLC And the Ladder Diagrams

This article demonstrates ladder logic in PLC.

PLCs hardwired in panelboard (Curtesy of Richmond Engineering Works)

The ladder diagram has and continues to be the traditional way of representing electrical sequences of operations. These diagrams represent the interconnection of field devices in such a way that the activation, or turning ON, of one device will turn ON another device according to a predetermined sequence of events.

Figure 1 – Simple electrical ladder diagram

Full article at EEP.


6 comments on “Automation : PLC And the Ladder Diagrams

  1. polomy
    September 2, 2012

    very helpful info

  2. Edvard Csanyi
    September 2, 2012

    Author , EEP Admin

    September 2, 2012

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  6. Janean Vear
    September 20, 2012

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