AMETEK XFR 2800 Watt Series - Manual (Page 68)

Local Operation
3-16 TM-F2OP-C1XN-01
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,
70 A for two 40 V, 70 A models. See Figure 3-5.
CAUTION
To prevent possible damage to the supply, do not connect the remote program
return line of the negative supply to the common connection.
Figure 3-5 Split Supply Operation of Multiple Supplies
(Positive-negative Supply)
(Local sense lines shown are default J10 connections.)