SYSTEM AND METHOD FOR DETECTING DISCONNECTION OF A DEVICE

摘要

A detection system (10) to detect disconnection of a powered device (12) from a link (14) of a Power over Ethernet (PoE) system is disclosed. The detection system (10) can include closed-loop control (16) configured to supply a predetermined test current (ITEST) to an electrically conductive path that includes at least a portion of the link (14) via which the powered device is connectable for receiving power. A detector (20) is configured to monitor the closed-loop control, the loop detector (20) providing a disconnect signal if the closed-loop control is outside of expected operating parameters, thereby indicating that the powered device has been disconnected from the link (14).