Chapter 6 Electromechan e r m m c a a ni cal a S Sy s st ems e s 147 7 Copyright Goodheart-Willcox Co., Inc. Copyright Goodheart-Willcox Co., Inc. 4. The photoelectric box counter is a typical industrial system. What are the basic parts of this system? Analysis 1. Of what signifi is the basic systems concept in industry? ficance 2. What is an opto-electronic system? 3. What are some applications of an industrial timing system? 4. What does the term digital system mean? To power panel Power disconnect switch Light source Conveyor belt Light detector Counter display Goodheart-Willcox Publisher Industrial electronic system.