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Chapter 2 Basic Functions
Protection Function Activation
Setting limitation functions
You can use the CONFIG settings to apply limits to the voltage and current output settings. You
can set limitations so that the programmed values cannot exceed the set overvoltage protection
(OVP trip point) and the set overcurrent protection (OCP trip point) and so that the values cannot
be lower than the set undervoltage limit (UVL trip point).
By using this feature, you can avoid accidentally turning the output off by mistakenly setting the
voltage or current to a value that exceeds the set OVP or OCP or to a value that is lower than the
set UVL.
If you have selected to limit the voltage setting (CF15: on), the valid programmable voltage
values will be limited to voltages that are less than 95% of the OVP trip point and voltages that
are greater than the UVL trip point. In addition, you will no longer be able to set the OVP trip
point to a value that is lower than the set output voltage or the UVL trip point to a value that
exceeds the set output voltage.
If you have selected to limit the current setting (CF14: on), the valid programmable current
values will be limited to currents that are less than 95% of the OCP trip point. In addition, you
will no longer be able to set the OCP trip point to a value that is lower than the set output current.
Overvoltage Protection (OVP), Overvoltage Protection 2 (OVP2), and
Overcurrent Protection (OCP)
The overvoltage protection (OVP) function is activated under the following conditions.
• When the output terminal voltage exceeds the set OVP trip point.
• When the load or the RMX programmable power supply is malfunctioning.
The overvoltage protection 2 (OVP2) function is activated under the following conditions.
• When the output terminal voltage exceeds 120% of the rated output voltage (when a voltage
is being applied from an external source).
• When the load or the RMX programmable power supply is malfunctioning.
If OVP2 is activated, turn the POWER switch off and on.
Figure 2-16. Alarm When OVP2 has been Activated
The overcurrent protection function (OCP) is activated under the following conditions.
• When the output current exceeds the set OCP trip point.
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