Siemens SITOP PSU8200 3ph Manual page 46

Applications
9.1 Parallel connection to increase power rating
NOTICE
Protective circuit for the parallel connection of more than two power supplies
When connecting more than two power supplies in parallel, additional measures must be
taken to prevent high backward feeding currents in the event of a secondary device
fault. For this purpose, a suitable protective circuit (e.g. decoupling diode
or DC-conform circuit breaker) must be installed between each "+" terminal of the power
supply and the common connection point.
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SITOP PSU8200 3ph
Manual, 11.2014, C98130-A7638-A1-2-7629