Output On/Off Control; Output Shut-Off (So) Control Via Rear Panel J1 Connector - TDK-Lambda Genesys User Manual

5.5.2. Resetting Activated Foldback Protection
There are four methods to reset an activated Foldback protection.
a) Press the OUT button. The Power Supply output is enabled and the Output
voltage and Output current will return to their last settings. In this method, the
Foldback protection remains armed; therefore if the load current is higher than the
Output current limit setting, the Foldback protection will be activated again.
b) 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.
c) Turn the Power Supply output Off and then On using the SO control (Refer to
Section 5.7). In this method the Foldback protection remains armed, therefore if
the load current is higher than the Output current limit setting the Foldback
protection will be activated again.
d) 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 by pressing the AC On/Off
switch to the On position. The Power Supply output is enabled and the Output
voltage and Output current will return to their last setting. In this method, the
Foldback protection remains armed. Therefore, if the load current is higher than
the Output current limit setting, the Foldback protection will be activated again.
5.6.

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
On/Off switch. 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 Output current fall to zero and the VOLTAGE display shows "OFF".
5.7.

Output SHUT-OFF (SO) Control via Rear Panel J1 Connector

Contacts J1-2, -3 and -15 (Fig.4-2, Item 5) serve as Output Shut-Off (SO) terminals. The
SO terminals accept a 2.5V to 15V signal or Open-Short contact to Enable or Disable 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 the unit (in Auto-Restart mode, the output will
not be enabled after applying AC power; even if SO is at an Off level). After an On to Off
transition is detected, the SO will enable or disable the Power Supply output according to
the signal level or the short/open applied to J1. This function is useful for also connecting
power supplies in a "Daisy-chain" (refer to Section 6.3). The SO control can also be used
also to reset the OVP and Foldback Protection (refer to Section 5.3 and 5.5 for details).
When the unit is shut-off by a J1 signal, the VOLTAGE display will show "SO" to indicate
the unit state. J1-15 is the SO signal input and J1-2, J1-3 (IF_COM) are the signal return
connections (connected internally). J1-2, -3 and -15 are optically isolated from the Power
Supply output. The SO control logic can be selected by the rear panel SW1 Setup switch.
Refer to Table 5-1 for SW1 setting and SO control logic.
SW1-5 setting
Down (default)
Up
SO signal level Power supply
J1-2(3), 15
2-15V or Open
0-0.6V or Short
2-15V or Open
0-0.6V or Short
57
83532002 Rev C
Display
output
On Voltage/Current
Off "SO"
Off "SO"
On Voltage/Current