Resetting Activated Foldback Protection; Output On/Off Control; Output Shut-Off (So) Control Via Rear Panel J1 Connector - Delta D750 User Manual

User Manual
D750
DC Power Supply

3.2.5.2 Resetting activated Foldback protection

There are four method store set an activated Foldback protection.
1. Press the OUT button. The power supply output isenabled and the Output Voltage and
current will return to their last setting. In this method, the Foldback protection remains
armed, therefore if the load current is higher than the current limit setting, the Foldback
protection will be activated again.
2. Press the FOLD button to cancel the Foldback protection. The power supply output will
be disabled and the VOLTAGE display will show "OFF". Press the OUT button to
enable the power supply output.
3. Turn the power supply output Off and then On using the SO control (refer to sect. 3.2.7).
In this method The foldback protection remains armed, therefore if the load current is
higher than the current limit Setting the Foldback protection will be activated.
4. Turn the power supply Off using the AC On/Off switch, wait until the front panel display
turns Off, then turn the unit back ON again. The power supply output is enabled and
the Output Voltage and Current will return to their last setting. In this method, the
Foldback protection remains armed, therefore if the load current is higher than the
current limit setting, the Foldback protection will be activated again.
3.2.6 Output On/Off Control
The Output On/Off enables or disables the power supply output. Use this function to make
adjustments to either the power supply or the load without shutting off the AC power. The
Output On/Off can be activated from the front panel using the OUT button or from the rear
panel J1 connector. The OUT button can be pressed at any time to enable or disable the
power supply output. When the output is disabled, the output voltage and current fall to zero
and the VOLTAGE display shows "OFF".
3.2.7 Output Shut-Off (SO) Control Via Rear Panel J1 Connector
Contacts 2, 3 and 15 of J1 (Fig.3-2, Item 5) serve as Output Shut-Off (SO) terminals. The
SO terminals accept a Open-Short contact to disable or enable the power supply output.
The SO function will be activated only when a transition from On to Off is detected after
applying AC power to unit. (Thus, in Auto-Rest art mode, the output will been abled after
applying AC power, even if SO is in Off level.). After On to Off transition is detected, the SO
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