6.1 Introduction to Electrically Controlled Systems

List basic applications of electrically controlled systems.

Give examples of inputs, outputs, and internal components in an electrically controlled system

Give examples of potential faults in an electrically controlled system

Differentiate between control/pilot signal and power/primary signals

Describe the purpose of separating pilot and primary

Describe the purpose of a control transformer

Describe the similarities and differences between a contactor and a solenoid operated valve

Describe ladder logic diagrams and indicate the advantages of ladder logic

List the general rules of ladder logic

Differentiate between switches and sensors

Describe the purpose of a transducer

Differentiate between manual and mechanical/automatic switches and give examples of each

Describe span/hysteresis/override

Differentiate between hard wired relay based ladder logic and PLCs and discuss the advantages of PLCs

Describe a control relay

Describe the AND function

Describe the OR function

Describe the operation of this electrically controlled system.

Discuss general troubleshooting procedures for electrically controlled systems.