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US 10,476,684 B2Granted
Dual sourcing power over ethernet on a single data path
AssigneeCrestron Electronics, Inc.
InventorsJohn Hartnett, Mark LaBosco
Life of this patent
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Abstract
Described herein is a data communication system using power over Ethernet (PoE) for power distribution, comprising a first and second powered device (PD), each of which is adapted to communicate with each other through an Ethernet data path (EDP) and is further adapted to receive direct current (DC) power using a PoE protocol, and a mid-span power injection device (MSPID) adapted to provide a communications interface such that data communications passes through the MSPID to and from each of the PDs, and wherein the MSPID is further adapted to provide a first DC power to only the first PD using the EDP, and to provide a second DC power to only the second PD using the EDP.
Claims17
A data communication system using power over Ethernet (PoE) for power distribution, comprising:
- a first and second powered device (PD), each of which is adapted to communicate with each other through a first Ethernet data path (EDP) and is further adapted to receive direct current (DC) power using a PoE protocol;
- and
- a mid-span power injection device (MSPID) adapted to provide a communications interface such that data communications passes through the MSPID to and from each of the PDs, and wherein
- the MSPID is further adapted to provide a first DC power to the first PD using the first EDP, and to provide a second DC power to the second PD using the first EDP, wherein
- the first EDP comprises
- a first pair of twisted wires, each of the twisted wires of the first pair of twisted wires including a first portion and a second portion, each of the first and second portions including a first end connected to a respective PD, and each of the first and second portions further including a second end, and
- a first pair of capacitors, each capacitor of the first pair of capacitors connecting the first and second portions of a respective wire together at the second end of the first and second portions, and wherein the MSPID comprises
- the first pair of capacitors for the first pair of twisted wires;
- a first power source equipment (PSE) adapted to provide the first DC power to the first PD;
- a second PSE adapted to provide the second DC power to the second PD;
- a first choke adapted to pass the first DC power from the first PSE to the first PD, and wherein the first choke is connected to the first portion of each wire of the first pair of twisted wires of the first EDP connected to the first PD;
- and
- a second choke adapted to pass the second DC power from the second PSE to the second PD, and wherein the second choke is connected to the second portion of each wire of the first pair of twisted wires of the first EDP connected to the second PD.
10 more elements
A method for providing direct current (DC) power using a power-over-Ethernet (PoE) protocol in an HDBase T data communication system, comprising:
- installing at least two powered devices (PDs) adapted to communicate with each other using a first and second Ethernet data path (EDP) and further adapted to receive DC power using a PoE protocol and the first and second EDPs;
- and
- installing a mid-span power injection device (MSPID) between the at least two PDs, wherein
- the MSPID is adapted to provide a first DC power to a first of the at least two PDs using the PoE protocol and the first EDP and without the first DC power being provided to a second of the at least two PDs, and wherein
- the MSPID is further adapted to provide a second DC power to the second PD using the PoE protocol and the first EDP and without the second DC power being provided to the first PD, and further wherein,
- data communications can occur between the first and second PDs using the first EDP that provides respective DC power to each of the first and second PDs, wherein
- each of the first and second EDPs comprises
- a first pair of twisted wires, each of the twisted wires of the first pair of twisted wires including a first portion and a second portion, each of the first and second portions including a first end connected to a respective PD, and each of the first and second portions further including a second end, and
- a first pair of capacitors, each capacitor of the first pair of capacitors connecting the first and second portions of a respective wire together at the second end of the first and second portions, wherein the MSPID comprises
- the first pair of capacitors for the first pair of twisted wires;
- a first power source equipment (PSE) adapted to provide the first DC power to the first PD;
- a second PSE adapted to provide the second DC power to the second PD;
- a first choke adapted to pass the first DC power from the first PSE to the first PD, and wherein the first choke is connected to the first portion of each wire of the first pair of twisted wires of the first EDP connected to the first PD;
- and
- a second choke adapted to pass the second DC power from the second PSE to the second PD, and wherein the second choke is connected to the second portion of each wire of the first pair of twisted wires of the first EDP connected to the second PD.
12 more elements
A data communication system using power over Ethernet (PoE) for power distribution, comprising:
- a first and second powered device (PD), each of which is adapted to communicate with each other through a first and second Ethernet data path (EDP), and wherein each of which is further adapted to receive direct current (DC) power using a PoE protocol;
- and
- a mid-span power injection device (MSPID) adapted to provide a bi-directional communications interface between the first and second PDs using the first and second EDPs, and wherein
- the MSPID is further adapted to
- provide a first set of DC power to the first PD using the first and second EDP, and to
- provide a second set of DC power to the second PD using the first and second EDP, and to
- substantially prevent the first set of DC power from reaching the second PD, and to
- substantially prevent the second set of DC power from reaching the first PD, wherein
- each of the first and second EDPs comprises
- a first pair of twisted wires, each of the twisted wires of the first pair of twisted wires including a first portion and a second portion, each of the first and second portions including a first end connected to a respective PD, and each of the first and second portions further including a second end, and
- a first pair of capacitors, each capacitor of the first pair of capacitors connecting the first and second portions of a respective wire together at the second end of the first and second portions, wherein the MSPID comprises
- the first pair of capacitors for the first pair of twisted wires;
- a first power source equipment (PSE) adapted to provide the first DC power to the first PD;
- a second PSE adapted to provide the second DC power to the second PD;
- a first choke adapted to pass the first DC power from the first PSE to the first PD, and wherein the first choke is connected to the first portion of each wire of the first pair of twisted wires of the first EDP connected to the first PD;
- and
- a second choke adapted to pass the second DC power from the second PSE to the second PD, and wherein the second choke is connected to the second portion of each wire of the first pair of twisted wires of the first EDP connected to the second PD.
14 more elements
Dependencies are inferred from the claim text.