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Chapter 1
Installation and Preparation
Rack Mounting
You can use brackets or slide rails to mount the RMX programmable power supply to a rack.
When you mount an RMX programmable power supply to a rack, install the optional support
angles (NI P/N) to support the device.
NI recommends that you keep all pieces that you remove from a RMX programmable power
supply during installation. You will need these pieces if you remove the device from a rack.
When using several RMX programmable power supplies together for master-slave parallel or
series operation, mount them to a rack before use.
Load Considerations
Note
The output can become unstable if the following types of loads are connected.
Loads with Peak Current or Pulse-Shaped Current
The front panel of the RMX power supply only displays averaged voltage and current values.
If the supply is connected to a load that draws current in spikes or pulses it is possible that the
front panel will display a current reading lower than the programmed current setpoint. In reality,
the spikes or pulses in the load current are exceeding the programmed current setpoint causing
the supply to switch instantaneously into constant-current mode and causing the output voltage
to drop.
For these types of loads, you must increase the set constant current or increase the current
capacity.
Figure 1-6.
Loads with Peak Current or Pulse-Shaped Current
Load current with peaks
Pulse-shaped load current
Set constant current
Ammeter reading (mean value)
Set constant current
Ammeter reading (mean value)
