NI PXIe-4112 Combining Multiple Outputs

NI DC Power Supplies and SMUs Help (NI-DCPower)

Edition Date: January 2018

Part Number: 370736U-01

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Cascading Multiple Channels in Series

Caution Image Caution  Do not exceed 150 VDC from any terminal to ground when cascading power supplies.

Because both channels on the NI PXIe-4112 are isolated outputs, you can cascade multiple channels in series to generate greater output voltage. For safety reasons, all the terminals must be less than 150 VDC from ground. Any terminal on the isolated channels can be connected to ground. When you cascade channels in series, a single NI PXIe-4112 can generate up to 120 V at 1 A using both channels, as illustrated in the following figures.

Caution Image Caution  Operating the NI PXIe-4112 with both channels in series has the ability to generate hazardous voltages up to 120 VDC. Shock hazards exist when voltage levels are greater than 30 VRMS, 42.4 V peak, or 60 VDC. Use extreme caution when a shock hazard is present. Always ensure the test system is de-energized before connecting or disconnecting the backshell assembly or cables from the NI PXIe-4112.

Series Connections for Local Sense Measurements

1 NI PXIe-4112 Backshell Connector
2 Sense Jumper
3 Twist Leads
4 Load

Series Connections for Remote Sense Measurements

1 NI PXIe-4112 Backshell Connector
2 Sense Jumper
3 Twist Leads
4 Load

Connecting Multiple Channels in Parallel

Similarly, you can use the NI PXIe-4112 to connect multiple channels in parallel to generate greater output current. NI has tested and supports connecting no more than two output channels in parallel. Connect channels 0 and 1 in parallel to generate up to 2 A at 60 V, as shown in the following figures.

Note Image Note  When connecting multiple channels in parallel, verify that all connected channels are set to output the same voltage level or voltage limit.

Parallel Connections for Local Sense Measurements

1 NI PXIe-4112 Backshell Connector
2 Sense Jumper
3 Twist Leads
4 Load

Parallel Connections for Remote Sense Measurements

1 NI PXIe-4112 Backshell Connector
2 Twist Leads
3 Load

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