HP E1418A manual Combining, Channels

Combining	You can combine channels in series to obtain higher output voltages or in
Channels	parallel to obtain higher output currents.
Channels in Series	∙ All channels connected in series MUST be configured as isolated
	channels (with isolated plug-on modules installed).
	∙ Up to 3 channels may be combined, but the output voltage MUST
	NOT exceed 42 Vdc/42 Vpeak.
Channels in Parallel	∙ Channels may be either Isolated or Non-Isolated.
	∙ Up to 16 channels may be combined.
	Figure 1-15 shows how to combine voltage channels (in series) and current
	channels (in parallel).
CAUTIONS
	All SERIES CONNECTED output channels MUST be configured as
	ISOLATED OUTPUTS.
	When combining output voltage channels, be sure not to exceed the
	maximum module isolation rating of 42 Vdc or 42 Vpeak.

Figure 1-15. Combined Channels Output Connections

34 Module Setup and Installation Chapter 1