Agilent Technologies N6700 manual Fault Output, Inhibit Input, Select Protect\Inhibit

Using the Digital Port Appendix B

Fault Output

Pins 1 and 2 can be configured as a fault-output pair. The polarity of pin 1 can also be configured. Pin 1 is the Fault output; pin 2 is the common for pin 1. Note that pin 2 must also be connected to pin 8.

The Fault Output function enables a fault condition on any channel to generate a fault signal on the Digital Control port. The following conditions will generate a fault event: over-voltage, over-current, over-temperature, inhibit signal, power-fail condition, or on some models, a power-limit condition.

Both pins 1 and 2 are dedicated to this function. This provides for an optically-isolated output. Pin 2’s function is ignored. Note that the Fault output signal remains latched until the fault condition is cleared. You must also clear the protection circuit.

Front Panel:	SCPI Command:
Select System\IO\DigPort\Pin1.	To configure the Fault function:
Select Function, then Fault Out.	DIG:PIN1:FUNC FAUL
Go back one level, select Polarity,	To select the fault output polarity:
	DIG:PIN1:POL <pol>
then either Positive or Negative.

Inhibit Input

Pin 3 can be configured as a remote inhibit input. The polarity of pin 3 can also be configured. Pin 8 is the common for pin 3.

The Inhibit Input function lets an external input signal control the output state of all of the output channels in the mainframe. The signal latency is 5 microseconds. Pin 3 can be programmed for the following Inhibit modes, which are stored in non-volatile memory:

LATChing Causes a logic-true transition on the Inhibit input to disable all outputs. The outputs will remain disabled after the inhibit signal is received.

LIVE Allows the enabled outputs to follow the state of the Inhibit input. When the Inhibit input is true, the outputs are disabled. When the Inhibit input is false, the outputs are re-enabled.

OFF The Inhibit input is ignored.

Front Panel:	SCPI Command:
Select System\IO\DigPort\Pin3.	To configure the Inhibit function:
Select Function, then Inhibit In.	DIG:PIN3:FUNC INH
Go back one level, select Polarity,	To select the inhibit input polarity:
	DIG:PIN3:POL <pol>
then either Positive or Negative.
	To latch the Inhibit signal:
Select Protect\Inhibit.
	OUTP:INH:MODE LATC
Select either Latching or Live.	To set the Inhibit signal live:
To disable Inhibit, select Off	OUTP:INH:MODE LIVE
	To disable the Inhibit signal:
	OUTP:INH:MODE OFF

Series N6700 User’s Guide 93