National Instruments RMX-4120 User Manual

© National Instruments | 2-15
RMX Programmable Power Supplies User Manual
• When the load or the RMX programmable power supply is malfunctioning.
Set the OVP and OCP trip points to appropriate values. Immediately after you purchase the
RMX programmable power supply or immediately after a load is changed, you have to set the
OVP and OCP trip points to values that are appropriate for the load.
The OVP2 trip point is fixed to 120% of the rated output voltage.
Setting the OVP and OCP Trip Points and the Detection Time of OCP Activation
OVP will trigger based on the voltage at the output terminals of the power supply. If you want
to activate the protection function according to the voltage across the load, take the voltage drop
in the load cable into consideration when you set the OVP trip point.
You can use the CONFIG settings to set the detection time of the OCP activation (CF13)
Figure 2-17. OVP and OCP Trip Point Displays
1. Press OCP•OVP.
The OCP•OVP key LED lights up, and the OVP trip point and OCP trip point are displayed
in the display area.
2. While viewing the panel display, turn the VOLTAGE knob to set the OVP trip point or the
CURRENT knob to set the OCP trip point.
OVP setting range: 10% to 112% of the rated output voltage
OCP setting range: 10% to 112% of the rated output current
3. Press OCP•OVP twice to finalize the settings.
RMX-4120/
RMX-4124
RMX-4121/
RMX-4125
RMX-4122/
RMX-4126
RMX-4123/
RMX-4127
OVP2 Trip Point 36 V 96 V 276 V 780 V
RMX-4120/
RMX-4124
RMX-4121/
RMX-4125
RMX-4122/
RMX-4126
RMX-4123/
RMX-4127
OVP Setting
3 to 33.6 V 8 to 89.6 V 23 to 257.6 V 65 to 728 V
OCP Setting 750 W
7.5 to 84 A 2.8 to 31.36 A 1 to 11.2 A 0.35 to 3.92 A
OCP Setting 1500 W
15 to 168 A 5.6 to 62.72 A 2 to 22.4 A 0.7 to 7.84 A
Lit
OCP trip point
OVP trip point

National Instruments RMX-4120 Specifications

General

Brand	National Instruments
Model	RMX-4120
Category	Power Supply
Language	English