National Instruments RMX-4120 User Manual page 50

RMX Programmable Power Supplies User Manual
Figure 2-24. Alarm Indication when (AC-FAIL) has been Activated
Lit
Shutdown (SD)
Shutdown (SD) is not activated as a result of the RMX programmable power supply detecting
an error. It is a function that is used to turn the output off through the application of a signal to
pin 6 of the rear-panel J1 connector when an abnormal condition occurs.
If SD is activated, turn the POWER switch off and on.
Figure 2-25. Alarm Indication when SD has been Activated
Lit
Power Limit (Power Limit)
This function changes the output voltage or output current according to the changes in the load
resistance. This function limits the output power to a value that is approximately 105% of the
rated output power. This function does not turn the output off.
When the power limit function has been activated, the ALARM LED blinks. An alarm signal is
not transmitted.
Table 2-2. Power Limits
750 W Model 1500 W Model
787.5 W 1575.0 W
Communication Monitoring (WATCHDOG)
The watchdog function monitors the SCPI command communication status. Communication is
assumed to have stopped if there is no communication within the time period specified by the
communication monitoring timer setting (CF17).
This function operates regardless of whether the product is in remote or local (panel control)
mode. When using local mode (panel control), set communication monitoring to off in the timer
settings. When using remote mode, you can set the timer using a command
(OUTP:PROT:WDOG).
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