Bi-directional power over ethernet for digital building applications
A system includes a plurality of network devices comprising a plurality of ports, a power bus connecting the network devices, wherein power is shared between the network devices over the power bus, and a controller for identifying available power and allocating power to the ports. The ports include a plurality of PSE (Power Sourcing Equipment) PoE (Power over Ethernet) ports each operable to transmit power to a device connected to one of the PSE PoE ports, a plurality of PD (Powered Device) PoE ports each operable to receive power from a device connected to one of the PD PoE ports, and a plurality of bi-directional PoE ports each configurable to operate as a PSE PoE port to transmit power to a device connected to one of the bi-directional PoE ports or as a PD PoE port to receive power from the connected device.
1. A system comprising:
a plurality of network devices comprising a plurality of ports;
a power bus connecting said plurality of network devices; and
a controller for identifying an available power and allocating the available power to said plurality of ports;
wherein said plurality of ports comprises:
a plurality of PSE (Power Sourcing Equipment) fault management power (FMP) ports, each operable to transmit the available power to a first device connected to one of the PSE FMP ports;
a plurality of PD (Powered Device) FMP ports each operable to receive the available power from a second device connected to one of the PD FMP ports; and
a plurality of bi-directional FMP ports each configurable to operate as a PSE FMP port to transmit the available power to a third device connected to one of the bi-directional FMP ports or as a PD FMP port to receive the available power from the third device,
wherein the FMP includes a fault detection between pulses of the available power.
2. The system of claim 1 , wherein the power bus is a common isolated bus.
3. The system of claim 1 , wherein the power bus includes a plurality of common bus bars.
4. The system of claim 1 , wherein the power bus is configured to couple together the plurality of network devices such that the available power received via a first network device of the plurality of network devices is provided to a second network device of the plurality of network devices.
5. The system of claim 1 , wherein the third device connected to one of the bi-directional FMP ports comprises one of a solar device, a rechargeable battery, or a reusable power source.
6. The system of claim 1 , wherein the controller is located at one of the plurality of network devices.
7. The system of claim 1 , wherein the controller is a system power controller that identifies the available power in the system and allocates the available power to the plurality of ports of the plurality of network devices.
8. The system of claim 1 , wherein:
at least one of the plurality of network devices receives utility power,
the third device comprises a rechargeable battery and the second device comprises a solar device, and
the controller is configured to:
identify available utility power, available battery power, and available solar power, and
determine a portion of each of the available utility power, the available battery power, and the available solar power to use for powering the plurality of ports.
9. The system of claim 1 , wherein at least one FMP port of the plurality of ports is configured to transmit excess power back to a utility power source.
10. The system of claim 1 , wherein one of the first device, the second device, and the third device is a power source equipment and another one of the first device, the second device, and the third device is a powered device.
11. An apparatus comprising:
a plurality of bi-directional fault managed power ports, each configurable to operate as a PSE (Power Sourcing Equipment) fault managed power port to transmit power to a device connected to one of the bi-directional fault managed power ports or as a PD (Powered Device) fault managed power port to receive the power from the device;
a power supply unit; and
a fault managed power module having one of the plurality of the bi-directional fault managed ports for receiving fault managed power and transmitting the fault managed power to the power supply unit, wherein the fault managed power includes a fault detection between power pulses.
12. The apparatus of claim 11 , wherein the fault managed power module is aligned for connection with the power supply unit.
13. The apparatus of claim 11 , wherein at least one of the plurality of bi-directional fault managed power ports supports an Ethernet cable or at least one twisted pair.
14. The apparatus of claim 11 , wherein the power supply unit is a removable module.
15. The apparatus of claim 11 , wherein at least one of the plurality of bi-directional fault managed power ports is operable to transmit or receive the fault managed power from a plurality of devices connected to the bi-directional fault managed power port on a single pair cable in a multi-drop arrangement.
16. The apparatus of claim 11 , wherein each of the plurality of bi-directional fault managed power ports comprises a voltage conditioner to account for different cable lengths connecting the bi-directional fault managed power ports to the connected devices.
17. A method comprising:
identifying an available power from at least two power sources, wherein the at least two power sources are different power source types;
identifying active ports in a fault managed power (FMP) system and performing a fault detection between pulses of the available power; and
allocating the available power from one or more of the at least two power sources to power the active ports by determining a portion of the available power to select of the at least two power sources for powering the active ports or for charging one of the at least two power sources.
18. The method of claim 17 , wherein the at least two power sources include:
a battery power source or a utility power source, and
at least one reusable energy power source.
19. The method of claim 18 , wherein the at least one reusable energy power source includes a solar power source and a wind power source and wherein allocating the available power further comprises allocating the available power to charge the battery power source or add to the utility power source.
20. The system of claim 1 , wherein the FMP includes a pulse synchronization between the plurality of bi-directional FMP ports for the fault detection.