Class Notes - Year 4 - 2020-2021
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Year 4

Lesson 405

Timing Relays: Practical Application of On-Delay, Recycle, and Interval Timers

IEC Manual 405

Traffic Light

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Sequence of Operation

1. North/South Left Turn - East/West Stop
2. North/South Through Traffic - East/West Stop
3. North/South Caution - East/West Stop
4. East/West Left Turn - North/South Stop
5. East/West Through Traffic - North/South Stop
6. East/West Caution - North/South Stop
7. Repeat cycles 1 through 6

Schematic

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