Phoenix Contact 1336547 The device features a comprehensive set of voltage monitoring functions including overvoltage, undervoltage, window monitoring, phase sequence detection, phase loss failure indication, asymmetry monitoring (with adjustable settings), and neutral monitoring capabilities. It is powered by a wide range of AC/DC power supply options from 24V up to 240V, with adjustable threshold values, response delay settings, and features for recording failures and supporting near-field communication (NFC) connectivity.