TDK-Lambda Z+ series - Series, Parallel, and Daisy-Chain Operation

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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 “O“ message appears on the Voltage display.
2. Rotate Voltage Encoder until "FOD“ message appears on Voltage display.
3. Press Voltage Encoder. “FOD” message appears on Voltage Display, and on Current display
shows “OFF” or “CC” or “C” 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 turn OFF).
5.3.4.2 Activated FOLD Alarm
When the Foldback is activated the power supply output shuts off. The Voltage and Current display
shows "FOD FAI" and the PROTECTION ALARM 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.
NOTE:
UVP protection delay = 500ms + delay setting.
5.3.5.1 Setting the Protection Delay
1. Press PROT button. PROT (GREEN) LED illuminates. The “O” message, appears on the Voltage
display.
2. Rotate Voltage Encoder until "R.D” message appears on Voltage display, and then press the
Encoder
3. The “R
. D” 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 PROT button twice to return display to the previous state and PREV 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 an OTP shutdown occurs, the display shows “Ot I”
and the ALARM 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 “Ot FAI” and the ALARM LED continues to blink. To reset the OTP
circuit, press OUT 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 FAI”. Output power is disabled, and the ALARM LED
blinks.
• 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.