Keysight RP7900 Serie Guide D'utilisation Et D'entretien page 327

Select the general purpose output as follows:
Front Panel Menu Reference
Select System\SDS\Output
Specify a 1 to enable the general purpose output. Then
press Select.
The operating mode of the SDS when an external AC contactor is installed is as follows:
When either the SDS relays or the AC contactor is enabled (programmed to close), the SDS checks
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to see if the AC contactor is presently open (DInput-3 and DInput-4 shorted).
If the digital input is shorted, the SDS relays and the contactor can be enabled and disabled.
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If the digital input is open without the contactor being enabled, the SDS goes into SDP protection.
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If the digital input opens after the contactor is enabled via the front panel or a SCPI command, the
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SDS relays can be enabled or disabled.
The SDS contactor-check will reset when both the SDS relays and the contactor are disabled.
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The command processing time is much faster than the time it takes to change the
relay state of the contactor. If you quickly send an AC contactor enable command,
then an off command, and then another on command, the digital input could read
an open causing the unit to go into protect.
External Control Status Information
You can return the status of the external control functions via the front panel of the power supply.
Front Panel Menu Reference
Select System\SDS\Data\Input
Safety Cover - closed or open
EStop signal - off or on
Relay Control - internal or external
Remote start - off or on
Keysight RP7900 Series Operating and Service Guide
Appendix A Keysight SD1000A Safety Disconnect System
SCPI Command
SYST:SDS:DIG:DATA:OUTP 1
SCPI Command
not available
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