Building devices with communication subsystems independently powered by power over Ethernet (POE)

  • US 10,908,570 B2
  • Filed: 04/19/2018
  • Issued: 02/02/2021
  • Est. Priority Date: 04/28/2017
  • Status: Active Grant
First Claim
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1. A power over Ethernet (PoE) device system for a building, the system comprising:

  • a plurality of building devices connected together and to a PoE source via a network, wherein the PoE source is configured to provide each of the plurality of building devices with PoE;

    wherein a first building device of the plurality of building devices comprises a communication subsystem circuit configured to;

    receive the PoE from the PoE source via one of the plurality of building devices;

    power the communication subsystem circuit using the PoE received from the PoE source via the one of the plurality of building devices;

    and communicate with the PoE source and the plurality of building devices via the network;

    wherein the first building device comprises a functional subsystem circuit configured to;

    power the functional subsystem circuit using power received from a permanent power source of the building;

    control an environmental condition of the building using the power received from the permanent power source of the building; and

    provide power from the permanent power source to the communication subsystem circuit in response to the PoE from the PoE source being insufficient to independently power the communication subsystem circuit.

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