Configuring Multiple Supplies For Split Supply Operation; Figure 3.4 Split Supply Operation Of Multiple Supplies - Xantrex XFR 7.5-140 Operating Manual

Local Operation
Using Multiple Supplies
Configuring Split supply operation uses two power supplies to obtain two positive voltages with
a common ground, or to obtain a positive-negative supply.
Multiple
Supplies for
Two Positive Voltages To obtain two positive voltages, connect the negative
Split Supply
output terminals of both supplies together in a common connection. The positive
Operation
output terminals will provide the required voltages with respect to the common
connection. See Figure 3.4.

Figure 3.4 Split Supply Operation of Multiple Supplies

Positive-negative Supply
!
To obtain a positive-negative supply, connect the negative output terminal of one
supply to the positive output terminal of the second supply. The positive output
terminal of the first supply then provides a positive voltage relative to the common
connection while the negative output terminal of the second supply provides a
negative voltage. You can set the current limits independently. The maximum
current available in split supply operation is equal to the rated output of the supplies.
For example, 30 A for two 40 V, 30 A models. See Figure 3.5.
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(Two Positive Voltages)
(Local sense lines shown are default J10 connections.)
CAUTION
To prevent possible damage to the supply, do not connect the remote program
return line of the negative supply to the common connection.
Operating Manual for XFR 1.2kW Series Power Supply