© National Instruments | 2-41
RMX Programmable Power Supplies User Manual
Locking Panel Operations (Key Lock)
The RMX programmable power supply key lock function prevents you from accidentally
changing the settings.
Figure 2-29. Key Lock Display Example
When the keys are locked (when the LOCK LED is lit), only the OUTPUT key is valid.
1. Configure all the settings, such as the output voltage and output current, as necessary.
2. Hold down LOCK (SHIFT+LOCAL) until the LOCK LED in the display area lights.
When the LOCK LED lights, the keys are locked.
To unlock the keys, hold down LOCK again (SHIFT+LOCAL) until the LOCK LED turns off.
Bleeder On/Off Feature
You can turn the bleeder circuit on and off. Turn the bleeder circuit off when you do not want
the internal bleeder circuit to sink output current. When you connect a battery, you can prevent
excessive electrical discharges by turning the bleeder circuit off.
When using master-slave parallel operation or series operation, use the same bleeder circuit
settings on all connected units.
Depending on whether the bleeder circuit is on or off, the sink current and the fall time of output
voltage when an external voltage source is connected will vary. The sink current or fall time
indicated here is a standard value.
Caution Risk of electric shock. Set the bleeder on/off setting to “on” before you
touch the output terminals. Even if you turn the output off or turn the POWER switch
off, if the bleeder on/off setting is set to “oFF” the voltage that was present when the
output was on will remain at the output terminals.
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