Limit Switches

Overview

This course consists of four lessons designed to provide training for the multi-craft training needs of process and manufacturing facilities. Topics include purpose and function, types of limit switches, safety considerations, and replacement compatibility. Additional topics include possible malfunctions, maintenance and troubleshooting, solid state, torque and geared, and lever-actuated switches.

Objectives

• Define the purpose, function, and types of limit switches.
• Explain and visually identify each of the limit switches.
• Describe safety considerations when working with limit switches.
• Know how to ensure that a replacement switch will work correctly.
• Describe the internal function of a lever-actuated limit switch and its function in a control circuit.
• Maintain, troubleshoot, repair, and adjust a lever-actuated limit switch.
• Describe the possible malfunctions of a lever-actuated limit switch.
• Describe the function of solid state limit switches.
• Maintain, troubleshoot, repair, and adjust solid state limit switches.
• Describe the possible malfunctions of solid state limit switches.
• Explain the internal function of a geared limit switch and torque switch in a control circuit.
• Maintain, troubleshoot, repair, and adjust solid state limit switches.
• Describe the possible malfunctions of a geared limit switch and torque switch.
• Troubleshoot, maintain and repair these switches.