Siemens SITOP PSU8200 Manual page 56

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 1ph
Manual, 11.2014, C98130-A7633-A1-3-7629