EMC Lesson 4: Understanding Electrical Diagrams and Control Circuits

All maintenance personnel must know how to read and write ladder diagrams – it’s an essential skill. Plus, it’s a prerequisite to using PLCs.

This program explains the fundamentals of simple control circuits and moves on to cover more complex circuits. Use this program to learn the basics and then go on to Product #712 Preventive Maintenance and Troubleshooting Control Circuits to learn troubleshooting. Both of these programs are our most popular companion programs!

Save Time During Troubleshooting—Learn to Read Ladder, Wiring, and Layout Diagrams

• Protect your people—follow our four basic rules of ladder diagrams to implement a safe circuit
• Add interlocking, memory, and cross-referencing to complex control circuits
• Layout a control panel—from scratch to finish—just by following the wiring and layout diagrams
• Implement motor control and magnetic starter circuit diagrams
• Prevent faulty operations and equipment damage—use mechanical, push-button, and electrical interlocks