National Instruments RMX-4120, User Manual, Page: 35 / 148

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Chapter 2 Basic Functions
You can use external control to toggle the output as well. Refer to Chapter 3, External Control ,
for additional information. CONFIG setting CF12 can be used to program the device to prioritize
CC or CV mode at startup.
Figure 2-7. Output Operations
Output State at Power-up
In the factory default settings, the output is off when the RMX programmable power supply
turns on. Using CONFIG parameter CF02, you can set the RMX programmable power supply
so that output is turned on at power on.
If you set the RMX programmable power supply so that output is turned on at power on, be sure
to check that the OVP trip point is set appropriately before you turn the RMX programmable
power supply off.
Caution
If you change the load, it may be damaged if the RMX programmable
power supply OVP and OCP settings are not correct.
Operation Overview
The RMX programmable power supply is a constant voltage (CV)/constant current (CC)
regulated DC power supply that can output a wide range of voltage and current within rated
output power.
If you configure the settings so that output voltage × output current is less than or equal to the
rated output power, the RMX programmable power supply operates as a traditional
constant-voltage (CV)/constant-current (CC) power supply.
If you configure the settings so that “output voltage × output current” is greater than the rated
output power, the actual output is limited by the power limit (approximately 105% of the rated
output power), and the output voltage and output current change depending on the load value.
Lit