TDK Lambda | Z+Low Voltage User Manual

5.3.4.1 Setting the Foldback Protection The Foldback can be set when the power supply output is Enabled (On) or Disabled (Off ). 1. Press PROT button. PROT (GREEN) LED illuminates. The ” OUP ” message appears on the Voltage display. 2. Rotate Voltage encoder until ”  ” message appears on Voltage display. 3. Press Voltage encoder. ”  ” message appears on Voltage Display, and on Current display shows ”  ” or ”  ” or ”  ” setting mode. 4. Rotate the Current encoder to adjust required mode and press to select. Display returns to the previous level. 5. Press PROT button to return display to its previous state (PROT LED turns OFF). 5.3.4.2 Activated FOLD Alarm When the Foldback is activated the power supply output shuts off. TheVoltage andCurrent display shows ” FA IL ” and the PROT red LED blinks. 5.3.5 Protection Delay A delay can be set from between the time when a fault is detected and the output is disabled. It relates only in cases of UVP and Foldback protection. 5.3.5.1 Setting the Protection Delay 1. Press PROT button. PROT (GREEN) LED illuminates. The ” OUP ”message, appears on the Voltage display. 2. Rotate Voltage encoder until ” . ” message appears on Voltage display, and then press the Encoder. 3. The ” . ” message appears on the Voltage Display. The Current display shows the value in seconds. 4. Rotate the Current encoder to adjust the delay. Protection delay setting range is 0…25.5sec. 5. Press Current encoder to select. Display blinks once and exists to the previous level. 6. Press PROT button once to return display to the previous state and PROT LED turns off. 5.3.6 Over Temperature Protection The OTP circuit shuts down the power supply before the internal components can exceed their safe internal operating temperature.When anOTP shutdown occurs, the display shows ”   ” and the PROT LED blinks. Resetting the OTP circuit can be automatic (non-latched) or manual (latched) depending on if he power supply is in Safe or Automatic restart mode. • Safe start mode: The power supply stays off after the OTP condition has been removed. The display continue to shows ”   ” and the PROT LED continues to blink. To reset the OTP circuit, press OUTPUT button (or send Output Enable command). • Auto-restart mode: The power supply recovers to it’s last setting automatically after the OTP condition is removed. 5.3.7 AC Fail Alarm The AC Fail alarm indicates whether the AC input has been discounted or shut down. When any of these faults occur, the display shows ” AC  ”. Output power is disabled, and the PROT LEDblinks. • Safe start mode: The power supply returns to ” OFF ”, after the AC power returns. • Auto-restart mode: The power supply recovers to it’s last setting automatically when AC power returns. NOTE: UVP protection delay = 500ms + delay setting.

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