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Occupancy Sensor Design

Occupancy Sensors: Choosing the Correct Sequence of Operation

There are 4 primary sequences of operation when designing a room with occupancy sensors:

  1. Auto-On / Auto-Off
  2. Auto-On / Manual or Auto-Off
  3. Manual-On / Manual or Auto-Off (Vacancy Mode)
  4. Last Switch State

You need to decide how you want the room to operate ahead of time so you can depict the correct control devices in your design documents. Let’s review each of the above sequences in detail.


1. Auto-On / Auto-Off

Occupancy Sensor - Auto-On, Auto-Off Operation Wiring Diagram

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