National Instruments RMX-4120 User Manual page 41

Chapter 2 Basic Functions
6. Turn the CURRENT knob to set the current.
Current Range: 0 to 105% of the Rated Output Voltage
RMX-4120
RMX-4121
RMX-4122
RMX-4123
RMX-4124
RMX-4125
RMX-4126
RMX-4127
7. Press OUTPUT to turn output on.
The SET LED turns off, and the OUTPUT LED in the display area lights. The voltage and
current are generated from the output terminals. When the device is operating as a
constant-voltage power supply, the CV LED in the display area lights. When the device is
operating as a constant-current power supply, the CC LED lights.
Even when the output is on, you can set the voltage and current by carrying out steps 5 and 6.
Note that the front panel display will continue to display the actual measured voltage or current
values rather than the programmed setpoints that you are adjusting. You can also adjust the
voltage and current setpoints while displaying the output power by using the PWR DSPL key.
You can use CONFIG setting CF12 to tell the device to prioritize CV or CC mode when
powering on the output. Set this according to the operation mode that you are using. You can
prevent overshoot from occurring when the output is turned on by prioritizing CV when using
the RMX programmable power supply as a constant-voltage power supply and by prioritizing
CC when using the RMX programmable power supply as a constant-current power supply.
When used as a slave device, CONFIG setting CF12 is automatically set to CC. To use the RMX
programmable power supply as a standalone unit or master unit after using it as a slave unit, set
the operation mode that you want to use. If you do not set the operation mode, CC will continue
to be prioritized.
When the output is turned on, the power supply's internal capacitors are charged. Depending on
the programmed current setpoint, the device may enter CC mode for an instant.
2-10 | ni.com
0 to 78.75 A
0 to 29.4 A
0 to 10.5 A
0 to 3.675 A
0 to 157.5 A
0 to 58.8 A
0 to 21 A
0 to 7.35 A