INTRODUCTION

Relays are fundamental components in electrical control systems, allowing circuits to be controlled remotely. In this assignment, you will explore how relays function and wire up a relay circuit to see electromagnetism in action. This builds on your knowledge of switches and circuit control, preparing you for more advanced automation applications.

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OBJECTIVES

Learn how relays work.
Wire up a relay circuit.

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ELECTROMAGNETISM AND RELAYS

Electromagnetism is central to the idea of relays. Relays are switches that use electromagnets to control the switch position.

Learn more about electromagnets by watching the video below.

https://youtu.be/V-Gus-qIT74

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RELAYS AND COILS

Let's go over relays, wiring, and coils. There are different types of relays that are useful in their own situations. Watch the following two videos which will indicate the type of relays you will use in your lab, different types of connections, and how a relay works.

Look over the image below to understand the relay schematic and the relay base. Note that the different numbering is for two different standards: NEMA and IEC.

Relay Schematic , Base and Terminal Standard

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LAB INSTRUCTIONS

View the lab example video, and then perform the lab.

Wire up the circuit per drawing AMAR-1200-13 shown below.
With the switch off, check continuity across both NO (connections 1 & 3 and 8 & 6) and NC (connections 1 & 4 and 8 & 5) contacts of the relay per drawing AMAR-1200-13.
With the switch on, check continuity across both NO (connections 1 & 3 and 8 & 6) and NC (connections 1 & 4 and 8 & 5) contacts per drawing AMAR-1200-13.
As you perform the tasks in this lab, consider the following questions:
- How is a relay like a 3-way switch?
- How is a relay different than a 3-way switch?
- How could this relay be used to control a circuit?
- You should not not need to consult any external resources.

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MATERIALS + TROUBLESHOOTING REFERENCE PAGES

Basic Electrical Trainer
Lockout Tagout
2-Way Switch
Circuit Breaker Box
Power Supply
Relay
Wire
Wire Colors

Tools:

Multimeter
Wire Strippers
4-in-1 Screwdriver
3 mm x 100 mm Screwdriver

Reference Page:

Continuity

Drawing AMAR-1200-13 as shown or AMAR-1200-13 - DC Relay Coil with Switch.pdf

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SUBMISSION

After completing the lab, answer the questions in the quiz. You will not be able to answer the questions if you have not done the lab.