Understanding Relay Logic and Circuits

Explore the world of relay logic and circuits with detailed explanations, images, and practical examples. Learn about basic relays, labeling, simple relay logic circuits, sump pump relay circuit, NAND burglar alarm, and various relay logic gates (AND, OR, NAND, NOR). Dive into the functioning of relays and their applications in electronic control switches.

• Relay Logic
• Circuits
• Basic Relays
• Electronic Control
• NAND Gate

ben_emf Follow

Uploaded on Sep 24, 2024 | 0 Views

Download Presentation

Please find below an Image/Link to download the presentation.

The content on the website is provided AS IS for your information and personal use only. It may not be sold, licensed, or shared on other websites without obtaining consent from the author. Download presentation by click this link. If you encounter any issues during the download, it is possible that the publisher has removed the file from their server.

Presentation Transcript

1. Relay Logic

2. Relay Logic

3. Basic Relays A relay is an electronic control switch used to open or close a mechanical contact whenever a voltage is applied to its coil.

4. Basic Relays A basic relay usually contains two sets of contacts, normally open and normally closed. The schematic will show the normal contact position for a de-energized coil. Normally Open Contact Normally Closed Contact 1 1 2 2 3 3 4 4

5. Relay Labeling Always look at the relay case to identify the coil, coil voltage, max current, NO and NC contacts. Labeling is always shown in a de-energized state. NC Common NO Coil Contacts

6. V2 12V Simple Relay Logic Ckt. J1 1 2 Key = Space R1 3 4 LED1 Which LEDs will illuminate in this circuit with switch 1 open? LED_red 1.0kohm 1 2 V1 48V R2 3 4 LED2 1.0kohm LED_red 1 2 R3 3 4 LED3 With switch 1 closed? 1.0kohm LED_red 1 2 R4 3 4 LED4 1.0kohm LED_red

7. Sump Pump Relay Circuit 120 VAC PUMP To Sump Probes What happens when the sump is wet? What happens when the sump is dry?

8. NAND Burglar Alarm

9. Relay Logic? (AND, OR, NAND, NOR)

10. Relay Logic? (AND, OR, NAND, NOR)

11. Complete the ckt (AND gate)

12. Complete the ckt (OR gate)

13. Complete the Truth Table

14. Complete the truth table

15. Complete the truth table

16. Motor Starter Circuit

17. Submarine Muzzle Hatch Ckt 120 VAC K-1-A Open Hatch Switch K-2-C K-3-A K-4-B K-6 CR K-5-A S3 K-6-G SOLENOID K-1 = Submarine Surfaced K-2 = Sea Pressure Equalized K-3 = Speed < 5 knots K-4 = Muzzle Hatch open K-5 = Missile Emergency K-6 = Start opening Muzzle Hatch