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PLC Digital Input and Digital Output Modules

S Bharadwaj Reddy
A “discrete” data point is one with only two states on and off. Process switches, push-button switches, limit switches, and proximity switches are all examples of discrete sensing devices. In...

Introduction to PLC Ladder Diagrams

S Bharadwaj Reddy
As an introduction to ladder diagrams, consider the simple wiring diagram for an electrical circuit in Figure 1.1a. The diagram shows the circuit for switching on or off an electric...

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