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

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