Parallel Channels for Higher Current (multi module)
PrintOverview
The PXI-4110 can output 2 amps on a single module up to 6 volts, by placing the two individual channels in parallel. Using two PXI-4110 in parallel we could source 2 amps of current at 20 volts.
Downloads
Filename: 2pxi-4110forhighcurrentapp.vi
Requirements: View
Figure 1: Connection diagram for using PXI-4110 in parallel
Setup
Make the connections as shown in Figure 1. The two PXI-4110 modules will be connected as parallel sources. If an output of 2 amps is wanted over the 20 volt terminals, then both PXI-4110 modules will need to have auxiliary power supplies connect to the Aux Power inputs. Open the example VI and set both instrument descriptors to one of the PXI-4110 modules.
Operating the Example VI
The PXI-4110 can be used as either a current or voltage supply in this example program. To use as a voltage supply simply set the voltage level control to the needed voltage and set the current max control to 2 amps. Now the two PXI-4110 modules will output the set voltage and a current of up to 2 amps.
To use the PXI-4110 as a current source set the voltage output to the highest value and the current max control to the current we want. The PXI 4110 will now adjust its voltage to maintain the current set on the current max control as long as the load connected will allow it.
Note 1: NI does not recommend placing more than 2 PXI-4110 modules in parallel to source even larger currents. However this can be done, but special considerations, such as the gauge of wire, should be taken to ensure safety.
Note 2: Please note that it is not possible to cascade the two channels on the PXI-4130 SMU together to achieve a higher output current. Since one of the SMU's channels (Ch1) can operate in all 4 quadrants and the other (Ch0) can only operate in one of the quadrants, stacking current on channel 1 could potentially damage the device because it could sink current if connected to another source. Therefore, in order to get a higher current through stacking SMU channels, many SMU Channel 0's would be required. When trying to achieve higher current through cascading, it is recommended to use the PXI-4110.
Related Links
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Digital Multimeter (DMM) and LCR Meter
Requirements
Filename: 2pxi-4110forhighcurrentapp.vi
Software Requirements
Application Software: LabVIEW Base Development System 8.2.1
Language(s): LabVIEW
Hardware Requirements
Hardware Group: Power Supplies
Hardware Model: PXI-4110
Driver: NI-DCPower 1.1.1
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