A-6 | ni.com
Appendix A Specifications
Protection Functions
Overvoltage protection (OVP)..........................Turns the output off, displays OVP, and lights
ALARM
Setting range
1
RMX-4120 ........................................3 to 33.6 V
RMX-4121 ........................................8 to 89.6 V
RMX-4122 ........................................23 to 257.6 V
RMX-4123 ........................................65 to 728.0 V
Setting accuracy ........................................ ±(1.5% of rtg)
Overvoltage protection 2 (OVP2).....................Turns the output off, displays OVP2,
and lights ALARM
Value (fixed)
RMX-4120 ........................................36 V (120% of the rated output voltage)
RMX-4121 ........................................96 V (120% of the rated output voltage)
RMX-4122 ........................................276 V (120% of the rated output voltage)
RMX-4121 ........................................780 V (120% of the rated output voltage)
Overcurrent protection (OCP)
2
.........................Turns the output off, displays OCP, and lights
ALARM
Setting range
3
RMX-4120 ........................................7.5 to 84 A
RMX-4121 ........................................2.8 to 31.36 A
RMX-4122 ........................................1 to 11.2 A
RMX-4123 ........................................0.35 to 3.92 A
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
4
RMX-4120 ........................................0 to 31.5 V
RMX-4121 ........................................0 to 84 V
RMX-4122 ........................................0 to 241.5 V
RMX-4123 ........................................0 to 682.5 V
1
(10% to 112% of the rated output voltage)
2
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.
3
(10% to 112% of the rated output current)
4
(0 to 105% of the rated output voltage)
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