Electrical Schematic Symbols – Logic and Output Devices

Learn about the function of logic and output elements of a control circuit and presents the symbols for various logic and output devices.

Prerequisites

Introduction to Electrical Schematics is recommended.

Description

This is the third lesson in the iKNOW™ Electrical Print Reading Library. This lesson defines the function of logic and output elements of a control circuit and presents the symbols for various logic and output devices.

Objectives

Describe the function of the logic element of a control circuit.  Describe the function of the output element of a control circuit.  Identify the symbol for a relay and the associated contacts.  Identify various logic symbols and state how they are used.  Identify the symbol for a motor starter and state how it is used.  Identify various output symbols and state how they are used.


ELECTRICAL PRINT READING