Introduction To Relays And Relay Logic

Relay and contactor construction and operations

What you'll learn

After taking this course the students will be able to identify the construction of a relay.

After this course the students will be able to identify the operation of a relay.

After this course the students will be able to define the voltage and current requirements of a relay.

After this course the students will be able to differentiate between a relay and a contactor.

After this course the students will be able to read a relay logic diagram.

Requirements

Students should have a fundamental working knowledge of AC and DC electricity, be able to use a multimeter, and be able to think logically and sequentially about electrical circuits.

Description

Manufacturers are constantly in need of people who can interpret and design ladder or relay logic and trouble shoot relays and contactors contactors at the component level.  Understanding relays and relay logic is fundamental in learning Programmable Logical Controllers (PLCs) and helps maintenance technicians to trouble shoot and install relays, contactors, and PLCs.  It helps the technician decide whether to us relays or PLCs depending on the size and type of installation and operation.  In this course the students will learn what a general purpose relay is, how it is constructed, how to apply it to relay logic.  They will learn also what a contactor is, how it is constructed, and how it is used in motor control operations. They will learn by observing the Constructor software, which is the state-of-the-art software program that helps engineers and technicians develop and design ladder logic programs. It is an interactive software program that really works and if your program works on the computer it will definitely work on real discrete components.  The instructor will also wire a relay and a contactor so that the student can see the actual operation of the relay and contactor.  Students then will be able to appreciate the operation as they can see through the plastic of the ice cube relay.  They will also observe the instructor reading voltages and continuity of the contacts and the coil itself.

Overview

Section 1: Introduction

Lecture 1 Introduction to Relays

Section 2: Construction of Relays

Lecture 2 Relay Construction

Lecture 3 Construction of a relay part 2

Section 3: Relay Construction Part 3

Lecture 4 Relay Construction Part 3

Section 4: Numbering Relay Components

Lecture 5 Numbering terminals of a relay.

Section 5: Contactors

Lecture 6 Contactors

Section 6: Parts of a Relay Logic Diagram

Lecture 7 Parts of a Relay Logic Diagram

Section 7: The Relay Logic Software Program

Lecture 8 The Relay Ladder Logic Software

Section 8: Wiring the Relay

Lecture 9 Wiring the Relay

Section 9: Adding a 120 Volt Light

Lecture 10 Adding a 120 Volt Load

Section 10: Adding an Indicator Light

Lecture 11 Adding an Indicator Light for a Motor

Section 11: Start Stop Station

Lecture 12 Start Stop Station

Section 12: Multiple Start Stop Stations

Lecture 13 Multiple Start Stop Stations

Section 13: Electrical Interlock

Lecture 14 Electrical Interlock

Section 14: Timing Relays

Lecture 15 Timing Relays

Section 15: Blinking Lights

Lecture 16 Blinking Lights

Section 16: Traffic Lights

Lecture 17 Traffic Lights

Section 17: Relays in Review

Lecture 18 Relays in Review

The intended learners of this course are those who currently work in or like to work in a manufacturing and electromechanical environment. It's also for students who are going to pursue learning Programmable Logical Controllers.