National Instruments RMX-4120, User Manual, Page: 132 / 148

A-16 | ni.com
Appendix A Specifications
Protection Functions
Overvoltage protection (OVP)..........................Turns the output off, displays OVP, and lights
ALARM
Setting range
RMX-4124 ........................................3 to 33.6 V (10% to 112% of the rated output
voltage)
RMX-4125 ........................................8 to 89.6 V (10% to 112% of the rated output
voltage)
RMX-4126 ........................................23 to 257.6 V (10% to 112% of the rated output
voltage)
RMX-4127 ........................................65 to 782 V (10% to 112% of the rated output
voltage)
Setting accuracy........................................ ±(1.5% of rtg)
Overvoltage protection 2 (OVP2).....................Turns the output off, displays OVP2, and lights
ALARM
Value (fixed)
RMX-4124 ........................................36 V (120% of the rated output current)
RMX-4125 ........................................96 V (120% of the rated output current)
RMX-4126 ........................................276 V (120% of the rated output current)
RMX-4127 ........................................780 V (120% of the rated output current)
Overcurrent protection (OCP)
1
.........................Turns the output off, displays OCP, and lights
ALARM
Setting range
RMX-4124 ........................................15 to 168 A (10% to 112% of the rated output
current)
RMX-4125 ........................................5.6 to 62.72 A (10% to 112% of the rated output
current)
RMX-4126 ........................................2 to 22.4 A (10% to 112% of the rated output
current)
RMX-4127 ........................................0.7 to 7.84 A (10% to 112% of the rated output
current))
Setting accuracy........................................±(3% of rtg)
Undervoltage limit (UVL) ................................Output voltage cannot be set to a value less than
or equal to the UVL voltage
Setting range
RMX-4124 ............................................0 to 31.5 V (0 to 105% of the rated output voltage)
RMX-4125............................................0 to 84 V (0 to 105% of the rated output voltage)
RMX-4126............................................0 to 241.5 (0 to 105% of the rated output voltage)
RMX-4127............................................0 to 682.5 V (0 to 105% of the rated output voltage)
1 This does not protect against the discharge current peak that is generated from the capacitors inside the
RMX output section when the load is changed suddenly.