Operating the Power Supply Locally 3

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

 

Because this function is edge-triggered, it may not be triggered by every state

NOTE

 

change. For example, 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 signal transition.

 

 

Enable/Disable Terminals

 

To prevent possible damage to the unit, do not connect the Enable + or Enable –

CAUTION

 

terminals to the positive or negative output terminals.

 

 

 

 

 

 

 

Enable/Disable terminals are available on the J1 connector to enable

 

or disable the power supply output. This function is level-triggered.

 

Simply connect a switch or relay between J1 pins 1 and 14. This

 

function is activated by SW1 setup switch 9.

 

 

 

These pins disable the output when they are opened. When the

 

output is disabled, the PROT indicator on the front panel will blink.

 

To re-enable the output after it has shut down, you must short the

 

Enable + and Enable – terminals. In Auto-Restart mode, operation

 

resumes automatically. In Safe-Start mode the Enable/Disable

 

function is latched. You must also press the OUT ON button or send

 

an OUTPut:PROTection:CLEar command to resume operation.

 

 

 

 

 

 

 

SW1 switch 9

 

ENA+/ENA– pins

Output

Display

Prot Indicator

 

Down (default)

 

Not active

On

Voltage/Current

Off

 

Up

 

Opened

Off

ENA

Blinking

 

 

 

Shorted

On

Voltage/Current

Off

 

Series N5700 User’s Guide

41

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Agilent Technologies 5746A, 5752A, 5744A, 5743A, 5748A Enable/Disable Terminals, SW1 switch SO Signal Level Output Display

5751A, 5744A, 5743A, 5750A, 5749A specifications

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