Help with HND course

[RossM]

I have the following questions to answer in an assignment for my HND.  Any help would be gratefully received.

Describe the design characteristics of a typical Unitary and Modular/rack-mounted PLC

Describe the different types of Input and Output Devices used in PLC systems.

Describe the internal Architecture of a typical PLC

Describe the Operational Characteristics of a PLC CPU

[philipjoseph]

Ross,
Check this, http://claymore.engineer.gvsu.edu/~jackh/books/plcs/html/plcs.html

Maybe, you could find something.

Philip

[RossM]

Thanks for that Phillip it was a great help.