3 Minute Read

| Overview

The OTN (Occupancy and Temperature Node) is part of 75F's vertically integrated suite of intelligent building solutions, delivering multi-mode sensing, and remote monitoring for building occupants. The OTN (Occupancy and Temperature Node) supports the Temperature influencing profile on the software side.

OTN is a temperature, occupancy, and humidity sensing device integrated into the existing CCU as a pairable option on the floor planner.


OTN (Occupancy and Temperature Node) is a product for customers who need micro zone level controls that can override existing schedules. This comes in handy in cases where there is dynamic occupancy in a space.

  • A restaurant where occupancy varies from day to day and time to time.
  • Predicting the occupied and unoccupied desks Work environments post Covid19 where the employee strength is cycled

| Advantages

The following reasons make OTN stand out amongst the occupancy detectors in the market.

  • OTN (Occupancy and Temperature Node) is powered by 2 x AA cells; hence, no wiring is required.
  • They can communicate on a 75F proprietary RF network and do not need a gateway to connect to the rest of the system.
  • Minimal BOM and hence value for money.
  • The device can sense temperature and humidity with mechanical buttons and can still work as a thermostat if it controls nothing.
  • The battery life is expected to be of 2 years
  • This profile does not connect/control any equipment at the terminal level. The reported temperatures influence the operation of the central plant equipment.

| Operation

OTN when paired as Temperature Influencing profile does not connect/control any equipment at the terminal level. The reported temperatures, however, influence the operation of the central plant equipment. therefore, a zone status but no equipment status if it is alone.

Each OTN module can be setback either due to vacation or daily unoccupied. When the module is in heating mode, then the setback temperature goes below the desired as determined by tuners. If the module is in cooling mode, then the setback temperature is higher than desired, as determined by tuners. If the module is in auto mode, then it operates in an energy-saving range in an unoccupied time.  The temperature can drift between the heating/cooling setback points.

There is a concept of building limit breaches as with the SmartNode module. A zone priority is assigned for the OTN operation as it affects any central air handling HVAC equipment connected to the CCU. 

When configured, the zone user preference can be changed from zone settings screens across portals, apps, and CCU.

Multiple OTN modules cannot be paired to a single zone. A module comes with a zone, building, and named schedule like a regular zone. In addition, there is a zone-level vacation and system vacation that affects all these temperatures influencing equipment modules.

| Configuration

From the Select Device type screen

  1. Select OTN


The OTN|Select module Type screen displays

  1. Select Temperature Influencing.


The Temperature influencing configuration screen displays the following parameters.

  • Zone Priority
  • Auto Force Occupied
  • Auto-Away
  • Temperature Offset


| Configuration Parameters



Default Value

Values in the drop-down list

Zone Priority

To set the zone priority






Auto Force Occupied

To enable Auto Force occupied



Auto Away

To enable Auto Away



Temperature Offset

To set the Temperature offset

0 (°F)


Range from -10 to + 10 in .1 increments  





  1. Click Set to confirm the parameters configured.

The Configured profile for the Temperature Influencing profile displays.





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