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PLC Primer ( 252K PDF file)
For those new to PLCs--Grasp the basics of PLCs

Programming and Documentation Pads (ALL) (720K PDF file)
These useful PLC listing pads allow you to implement better PLC design implementations and keep an orderly documentation system. Select a PDF with all listing and sample pads or individual listings with samples (below)

PLC Program Listing (184K PDF file)
Input/Output Listing (200K PDF file)
Register-Word/Internal Output Usage Listing (196K PDF file)
PLC Automation Project Notes (168K PDF file)

PLC Glossary of Terms (92K PDF file)
A complete glossary of the most often used terms in PLC systems

Logic Symbols, Truth Tables and Equivalent Ladder/PLC Logic Diagrams (20K PDF file) Handy table of equivalent electromechanical ladder diagram and PLC symbols

Electrical Relay Diagram and P&ID Symbols (88K PDF file)
Reference table of relay and P&ID diagram symbols used in design

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