Cascading Outputs

Caution  Do not exceed 60 VDC from any terminal to ground when cascading power supplies.

Because channels 1 and 2 on the NI PXI-4110 are isolated outputs, you can cascade multiple channels in series to generate greater output voltage. For safety reasons, all the terminals must be <60 VDC from ground. Any terminal on the isolated channels can be connected to ground. When you cascade channels in series, the NI PXI-4110 can generate up to 46 V at 1 A, as illustrated in the following figures:

Note  The NI APS-4100 is required for current above 100 mA.

Caution  The NI PXI-4110 does not provide isolation when using CH 0.

Similarly, you can use the NI PXI-4110 to cascade multiple channels in parallel to generate greater output current. NI recommends cascading no more than two output channels in parallel. Cascade channels 0 and 1 in parallel to generate up to 2 A at 6 V, as shown in the following figure:

Note  The NI APS-4100 is required for current above 1.1 A in this cascaded configuration.

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

For more information about cascading the outputs of the NI PXI-4110, refer to the NI Developer Zone document, Cascading the Outputs of a DC Power Supply to Extend Voltage and Current Ranges at ni.com/zone.