Is it possible to generate negative voltage using the N6700B Modular Power System?

The output terminals of all N6700B power modules are isolated, and the only limitation is that no output terminal may be more than 240 VDC from any other terminal or from chassis ground. Thus, the positive output terminal of any type of module may be connected to ground (or "common"), which will effectively make that module generate a negative voltage.

The N6784A 4-quadrant General Purpose Source/Measure Unit is a full bipolar power supply that can generate both positive and negative voltages of up to 20 V (at 1 A).