Discrete Fault Indicator DFI, Pin | Agilent Technologies 66309B

7 - Programming the DC Source

Discrete Fault Indicator (DFI)

The discrete fault indicator is an open-collector logic signal connected to the rear panel FLT connection that can be used to signal external devices when a fault condition is detected. To select the internal fault source that drives this signal, use:

OUTPut:DFI:SOURce QUEStionable OPERation ESB RQS OFF

To enable or disable the DFI output, use:

OUTPut:DFI:STATe ON OFF

Using the Inhibit/Fault Port as a Digital I/O

You can configure the inhibit/fault port to provide a digital input/output to be used with custom digital interface circuits or relay circuits. As shipped from the factory, the port is shipped for inhibit/fault operation. You can change the configuration of the port to operate as a general-purpose digital input output port with the following command:

[SOURce:]DIGital:FUNCtion RIDFi DIGio

The following table shows the pin assignments of the mating plug when used in RI/DFI mode as well as Digital I/O mode. Refer to Table A-2 for the electrical characteristics of the port.

FAULT/INHIBIT

FLT Output

INH Input

INH Common

DIGITAL I/O

OUT 0

OUT 1

IN/OUT 2

Common

Bit Weight

not programmable

To program the digital I/O port use:

[SOURce:]DIGital:DATA <data>

where the data is an integer from 0 to 7 that sets pins 1 to 3 according to their binary weight. Refer to the DIGital:DATA command for more information.

66111A, 66309B, 66311B, D specifications

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Agilent Technologies 66309B, 66311B Discrete Fault Indicator DFI, Pin, Out In/Out, Bit Weight

Models: 66111A 66309B 66311B D