Filter
Top Products
Output On/Off Control
42 Series N5700 User’s Guide
Output On/Off Control
The Output On/Off control turns the power supply output on or off.
This can be done with the front panel OUT ON button or from the
rear panel J1 connector. With the output off, adjustments can be
made to the power supply or the load without shutting off AC power.
OUT ON button
The OUT ON 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 go to zero and the display shows OFF.
Output Shut-Off Terminals
Output Shut-Off (SO) terminals are available on the J1 connector to
enable or disable the power supply output. This function is edge-
triggered. J1 pin 15 is the Shut-Off input, and pins 2 and 3, which are
connected internally, are the signal common. All pins are optically
isolated from the power supply output. The Shut-Off input accepts a
2.5V-to-15V signal or an open/short contact to enable or disable the
output. The Shut-Off control logic is selected by SW1 setup switch 5.
When an on-to-off transition is detected at the Shut-Off input, the
Shut-Off function enables or disables the output according to the
signal level or the open/short applied to J1 pin 15. When the output
has been disabled by the Shut-Off function, the display shows SO to
indicate the output is disabled.
To re-enable the output after it has shut down, you must disable the
Shut-Off signal. In Auto-Restart mode, operation resumes
automatically. In Safe-Start mode the Shut-Off function is latched.
You must also press the OUT ON button or send an
OUTPut:PROTection:CLEar command to resume operation.
The Shut-Off function can be used to shut down multiple power
supplies in a daisy-chain fashion as explained later in this chapter. It
can also be used to reset the OVP and OCP as previously described.
SW1 switch 5 SO Signal Level Output Display
Down (default) 2 - 15 V or Open On Voltage/Current
0 – 0.4V or Short Off SO
Up 2 - 15 V or Open Off SO
0 – 0.4V or Short On Voltage/Current
NOTE
After applying AC power, the output will not be disabled by the Shut Off
function if the Shut-Off input is in the shut-off state. This is because the unit
has not detected an on-to-off Shut Off transition.