2.1 INPUTS AND OUTPUTS 16

2.1.1 Inputs 16

2.1.2 Output Modules 19

2.2 RELAYS 24

2.3 A CASE STUDY 25

2.4 ELECTRICAL WIRING DIAGRAMS 26

2.4.1 JIC Wiring Symbols 27

2.5 SUMMARY 29

2.6 PRACTICE PROBLEMS 30

2.7 ASSIGNMENT PROBLEMS 31

2.1 PRACTICE PROBLEM SOLUTIONS 33