Stacking Two PXI-4110 Modules as an 80 Volt Power Supply
PrintOverview
The PXI-4110 module can supply a 46 volt DC signal. However the ground circuitry can safely be used with voltages 60 volts from earth ground. By using two modules we can bias the ground of one above the other and create an 80 volt DC signal. This could be further expanded on with four modules to create a 120 volt DC signal. That would be operating at the limits of the hardware, because the signal would be + and - 60 volts from earth ground.
Downloads
Filename: pxi-4110-2module-80v.vi
Requirements: View
Figure 1: Connection diagram for stacking two PXI-4110 to create 80 V range
Setup
Make the connections as shown in Figure 1. The +20 terminal of one module will be connection to the -20 of the other. The same +20 terminal should then be jumped to the ground on the same module. The unconnected +20 and -20 terminals are now setup as the leads of a 0 to 80 volt source.
Operating the Example VI
The PXI-4110 is setup to be a voltage source in this example. Before running the program set the maximum current the system will need. The maximum current available is 200 mA unless the aux power input is connected to an auxiliary power supply. Set the current to the same value for all four channels. If different currents are needed for different voltages, then the code could be modified to provide a control inside the while loop. The voltage can be changed while the VI is running and the voltage on the terminals will change.
Note: When stacking voltages insure no terminal if further than 60 volts from earth ground.
Related Links
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Digital Multimeter (DMM) and LCR Meter
Requirements
Filename: pxi-4110-2module-80v.vi
Software Requirements
Language(s): LabVIEW
Hardware Requirements
Hardware Group: Power Supplies
Hardware Model: PXI-4110
Driver: NI-DCPower 1.1.1
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