Agilent Technologies N6700 manual Using the Protection Functions, Set the Over-Current Protection

Operating the Power System 4

Using the Protection Functions

	Each output has independent protection functions. A front panel
	status indicator will turn on when a protection function has been set.
	Protection functions are latching, which means that they must be
	cleared once they have been set. As explained under “Couple Output
	Protection” you can configure the instrument so that when a
	protection fault occurs on one output, ALL outputs will be turned off.
	Of the following protection functions, only OV, OC, PROT, and INH
	are user- programmable.
OV	Over-voltage protection is a hardware OVP whose trip level is a programmable value.
	The OVP is always enabled.
OC	Over-current protection is a programmable function that can be enabled or disabled.
	When enabled, the output will be disabled when the output current teaches the
	current limit setting.
OT	Over-temperature protection monitors the temperature of each output and shuts
	down the output if any temperature exceeds the maximum factory-defined limits.
PF	PF indicates that a power fail condition on the AC mains has disabled the output.
CP+	CP+ indicates that a positive current limit condition has disabled the output. This
	protection function does not apply to all power modules. Refer to Appendix C for
	further information.

PROT

INH

Prot indicates that the output is disabled because of a coupled protection signal from another output.

The Inhibit input (pin 3) on the rear panel digital connector can be programmed to act as an external shutdown signal. Refer to Appendix B for further information.

Set the Over-Voltage Protection

The over-voltage protection function turns off the affected output if the output voltage reaches the programmed over-voltage limit.

Front Panel:	SCPI Command:
Select Protect\OVP.	To set the OVP level for outputs 1 and
Enter a value in the OVP level box	2 to 10 V:
and press Select.	VOLT:PROT 10,(@1,2)

Set the Over-Current Protection

When over-current protection is enabled, the power system turns off the output if the output current reaches the current limit setting and transitions from CV to CC mode.

Front Panel:	SCPI Command:
Select Protect\OCP.	To enable OCP for outputs 1 and 2:
Check Enable OCP and press Select.	CURR:PROT:STAT 1,(@1,2)

Series N6700 User’s Guide 59