Power over ethernet power distribution system using dominant and non-dominant sensors

A Power over Ethernet (PoE) power distribution system comprising:

• a Power Sourcing Equipment (PSE), having several ports, for providing power,
• sensors, each sensor comprised in a Powered Device (PD) connected via an Ethernet cable to a port of the PSE, for sensing an event,
• an assignment providing unit for providing assignments assigning at least one sensor, of the sensors, to a dominant class, thereby defining at least one dominant sensor, and assigning at least one other sensor, of the sensors, to a non-dominant class, thereby defining at least one non-dominant sensor,
• wherein the PoE power distribution system is operable in a system low power mode, in which the PoE power distribution system consumes less power, and a system high power mode, in which the PoE power distribution system consumes more power, wherein the PoE power distribution system is adapted such that in the system low power mode the at least one dominant sensor consumes power and the at least one non-dominant sensor does not consume power and that the PoE power distribution system switches from the system low power mode to the system high power mode, if the at least one dominant sensor has sensed an event,
• wherein the PoE power distribution system is adapted such that in the system low power mode a port of the PSE to which a non-dominant sensor is connected is switched off.