Xantrex Technology XPD 7.5-67, XPD 60-9, XPD 120-4.5, XPD 33-16, XPD 18-30 manual

Section 3. Local Operation

Using Multiple Supplies

Positive-negative supply To obtain a positive-negative supply, connect the negative output terminal of one supply to the positive terminal of the second supply. The positive output terminal of the first supply now provides a positive voltage relative to the common connection. The negative output terminal of the second supply provides the negative voltage. The current limits can be set independently of each other. The maximum current available in split operation is equal to the rated output of the supplies.

	Postive Sense	Load Lines
	Positive Output	Use the largest gauge and
		shortest length possible
	Terminal
	Negative Output
	Terminal
	Return Sense	Positive Load
	Power Supply 1	Terminal
		Common Load
		Terminal
	Postive Sense	Negative Load
		Terminal
	Positive Output
	Terminal	Load
	Negative Output
	Terminal
	Return Sense
	Power Supply 2
Figure 3.5	Split Supply Operation of Multiple Supplies (Positive-negative Supply)

Note Split supply operation requires the use of an isolated analog interface card on the slave unit. In this arrangement, one-knob control of both supplies is possible

44 Operating Manual for XPD Series Power Supply