Programable Electronic Controller (PLC)
The following technical information is From Automation Direct.com
Considerations for Choosing a PLC
A Condensed Guide to Automation
Control System Specification, Design and Installation - T. Elavsky - Automation
Direct
Part
1: System Identification and Safety
Part
2: Control Device Specification
Part
3: Design
Connecting
3-wire sinking and sourcing devices to PLC input modules
Motion
Control System Choices
Automating Manufacturing Systems with PLCs- This is a sensational 846 page book full of information on PLCs, logic design, Sensors etc -from Grand Valley State University and written by Hugh Jack- A 5.4Mbit download but worth the wait!
PLCs- Terminology,Tools, Tables and Calculators- From Controlsweekly.com
PLC Glossary of Terms -A complete glossary of the most often used terms in PLC systems- from www.industrialtext.com
PLC Primer - A very useful 16 page document from www.industrialtext.com with all the basics about PLCs
PLC Basics - A fantastic 39 page tutorial and associated exam from Eaton Electrical
PLC Resource - Lots of great technical papers and tools here- From PLC OpenYour Personal PLC Tutor Site - From PLCs.net
PLC Basics- From the PLC Man
Basics
of PLCs- A tutorial from Siemens