Abstract: A power device may have at least two capacitors in series with each other and in parallel with a DC power source. The power device may have at least a first converter that has at least a controller configured to balance a voltage of the at least two capacitors. The power device may have at least a second converter connected to the at least two capacitors. The second converter may have at least three input conductors, each connected to a terminal of the at least two capacitors. The second converter may have at least two output conductors. The second converter may have at least a switching circuit between the at least three input conductors and at least two output conductors. The second converter may have at least a controller configured to operate the switching circuit. The second converter may passively preserve the voltage balance between the at least two capacitors.

Abstract: A power device may have at least two capacitors in series with each other and in parallel with a DC power source. The power device may have at least a first converter that has at least a controller configured to balance a voltage of the at least two capacitors. The power device may have at least a second converter connected to the at least two capacitors. The second converter may have at least three input conductors, each connected to a terminal of the at least two capacitors. The second converter may have at least two output conductors. The second converter may have at least a switching circuit between the at least three input conductors and at least two output conductors. The second converter may have at least a controller configured to operate the switching circuit. The second converter may passively preserve the voltage balance between the at least two capacitors.

Abstract: A power device comprising at least two capacitors in series to each other and in parallel to a DC power source. The power device may comprises a first converter that comprises a controller configured to balance a voltage of the at least two capacitors. The power device may comprises a second converter connected to the at least two capacitors. The second converter may comprise at least three input conductors, each connected to a terminal of the at least two capacitors. The second converter may comprise at least two output conductors. The second converter my comprise a switching circuit between the at least three input conductors and at least two output conductors. The second converter may comprise a controller configured to operate the switching circuit. The second converter may passively preserve the voltage balance between the at least two capacitors.

Abstract: A redundant powering system for a powered device receiving power over communication cabling, the redundant powering system comprising: a redundant power supply comprising a first power sourcing equipment and a second power sourcing equipment; a powered device; communication cabling connecting the redundant power supply to the powered device, the communication cabling comprising a first path connecting the first power sourcing equipment to the powered device and a second path connecting the second power sourcing equipment to the powered device, the first and second paths at least partially being constituted of a single structured cable, the at least one powered device comprising at least one signature impedance, the redundant power supply being operable so that power is operably supplied to the powered device from only one of the first and second power sourcing equipment.

Abstract: A communication system comprising: a first device; a second device; and communication cabling comprising four twisted wire pairs arranged to enable communication between the first device and the second device; the first and the second devices being operable to perform auto-negotiation on a communication path comprising a first two of the four twisted wire pairs, and to perform auto-negotiation on a communication path comprising a second two of the four twisted wire pairs, the second two twisted wire pairs being distinct from the first two twisted wire pairs, the first and second devices being operable to enable communication on the communication path comprising the second two twisted wire pairs in the event of a failure of the auto-negotiation on said communication path comprising said first two twisted wire pairs.

Abstract: A redundant powering system for a powered device receiving power over communication cabling, the redundant powering system comprising: a redundant power supply comprising a first power sourcing equipment and a second power sourcing equipment; a powered device; communication cabling connecting the redundant power supply to the powered device, the communication cabling comprising a first path connecting the first power sourcing equipment to the powered device and a second path connecting the second power sourcing equipment to the powered device, the first and second paths at least partially being constituted of a single structured cable, the at least one powered device comprising at least one signature impedance, the redundant power supply being operable so that power is operably supplied to the powered device from only one of the first and second power sourcing equipment.