18Wiring the P-Fail Alarm ContactsThe “P-Fail” alarm relay is provided to signal critical error conditions that may occur onthe switch. The contacts are energized upon powering up of the switch and remainenergized until a critical error occurs including power failure, Ethernet port disconnectionand MAC violation. Take the wiring illustration below as an example that illustrates theproper relay connection forming a normally close circuit, and the connection is to bebroken when an error occurs.P-Fail Alarm Wiring
