User Connections and Considerations
47
Operating Considerations
Auto-Parallel Operation
Auto-Parallel Wiring
Figure 4-6 illustrates how power supplies can be connected in auto-parallel for increased current output. You can connect
supplies of the same model in auto-parallel as follows:
• Series 654xA or 655xA - up to three supplies.
• Series 657xA - up to five supplies.
Use load leads of a sufficient wire size so that the absolute voltage difference between the + output terminal of the “master”
supply and the + output terminal of the first “slave” supply is kept under 2 V at rated current. This also applies to the
voltage difference between the + output terminals of the first and second slave supplies. If remote sensing is required,
connect the load to the remote sense terminals of the master supply, as shown by the dashed lines in Figure 4-6.
Note To avoid output oscillations with Series 654xA and 655xA supplies, observe the wiring suggestions given
under “External Voltage Control”.
Figure 4-6. Connecting Power Supplies in Auto-Parallel
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