Triple-Output Programmable DC Power Supply
NI PXI-4110 NEW!
• 3 independent DC power supplies
• 0 to 6 VDC, 1 A, nonisolated
• 0 to +20 VDC, 1 A, isolated
Operating Systems
• Windows Vista/XP/2000
Recommended Software
• LabVIEW
• LabVIEW Real-Time Module
• LabWindows™/CVI
• Measurement Studio
• LabVIEW SignalExpress
• 0 to -20 VDC, 1 A, isolated
• 16-bit voltage setpoint and current limit
• 16-bit voltage/current
readback measurements
• 20 mA and 1 A current modes
• 2 power source options
Other Compatible Software
• Microsoft Visual Basic
• C/C++
• Internal (PXI backplane) – 9 W output
• Auxiliary – full 46 W output
• Isolated channels can be combined
for 0 to +40 VDC operation
Driver Software (included)
• NI-DCPower
Overview
Internal/External Supply Options
The National Instruments PXI-4110 is a programmable, triple-output
precision DC power supply in a single-slot, 3U PXI module. The
NI PXI-4110 has two isolated channels, one from 0 to +20 V and the
other from 0 to -20 V, and a single nonisolated 0 to 6 V supply, all
capable of sourcing up to 1 A per channel. The PXI-4110 has 16-bit
resolution for programming the voltage setpoint and current limit and
for using the voltage and current readback measurement functionality.
The versatile supply rails and high accuracy make the PXI-4110 an
excellent general-purpose, single-quadrant power supply for design
validation and manufacturing test applications.
You can power the PXI-4110 either internally from the PXI backplane or
externally through the NI APS-4100, a front-panel-connected auxiliary
DC supply. Using internal power reduces the number of connections
required on the front panel but also limits the available output power
because of per-slot PXI power restrictions. When internally powered,
the nonisolated, 0 to 6 V channel can be operated at its full 1 A current
range, but the isolated channels are limited to 100 mA. When externally
powered, all channels can be operated at full power of 1 A per channel
for a total maximum output power of 46 W.
Linear Supply with Switching Preregulation
Power Supply with Precision
Source Capability
The PXI-4110 uses a combination of switching and linear regulation to
provide excellent output power and accuracy in the 3U PXI module. On
each channel, input power (coming from either the PXI backplane or the
APS-4100) is regulated to within a certain percentage of the desired
output power. This preregulation stage is governed by an intelligent PID
algorithm implemented on board the module, ensuring the amount of
power passed to the second (linear) stage is at the most efficient level,
given the desired output.
The PXI-4110 has the ability to source both voltage and current from
each of its three outputs. As a voltage source, it can be programmed
in 120 µV steps on the +6 V channel and 400 µV steps on each of the
20 V channels. As a current source, it can be programmed in 20 µA steps
on each channel in the 1 A current range. Additionally, you can set each
of the 20 V channels to a 20 mA current range for 400 nA programming
resolution. You can use this impressive level of current resolution in
traditional power supply applications or in many applications that
typically require a separate precision source measure unit.
After additional filtering, you can use traditional linear regulation
techniques and amplification to further regulate the signal and source the
final voltage or current. Because the output is linearly regulated, it has
very quick load response and high precision – even at levels as low as 0 V.
Also, because the linear regulation occurs on the preregulated signal,
the power dissipation is relatively small and easily cooled in a PXI slot.
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