Why is 100 mA the Maximum Current Limit for the PXI-4130 in the NI-DCPower Soft Front Panel? Primary Software: Driver Software>>NI-DCPowerPrimary Software Version: 1.2.1 Primary Software Fixed Version: N/A Secondary Software: Utility Software>>Soft Front Panels Hardware: Modular Instruments>>Power Supplies>>PXI-4130
Problem: I'm using the NI-DCPower Soft Front Panel (SFP) to output DC Voltage on a PXI-4130. On Channel 1 the SFP does not let me set the current limit above 100mA. This is well below the maximum current of the PXI-4130. Solution: The NI-DCPower Soft Front Panel (SFP) sets the maximum current limit of the PXI-4130's channel 1 to 100 mA when auxiliary power is not provided. Without aux power the PXI-4130 is limited to providing 2W power or 300mA current. The SFP's maximum current limit is 100 mA because that is the largest current that allows the full voltage range (+/- 20 V) to be used and still stay within the 2W power limit.  To use a higher maximum current limit in the Soft Front Panel connect an auxiliary power source to the PXI-4130. The aux power source should provide 11-15.5 volts and up to 5 amps. The NI APS-4100 power supply can be used for this. Once aux power is connected make sure the AUX Power LED is turned on and restart the SFP. The maximum current limit should now be 2 Amps. Note: This is only an issue with the NI-DCPower Soft Front Panel. When programming with the NI-DCPower driver the maximum output without aux power is 300 mA or 2W. Related Links: Product Page: NI PXI-4130 Product Page: NI APS-4100 Product Manuals: NI PXI-4130 Specifications Attachments:
Report Date: 06/18/2008 Last Updated: 06/19/2008 Document ID: 4MHF6QN9 |
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