Siemens SINAMICS S120 Applications Manual - Page 33

Browse online or download pdf Applications Manual for Industrial Equipment Siemens SINAMICS S120. Siemens SINAMICS S120 34 pages. Applications for cabinet modules, liquid-cooled
Also for Siemens SINAMICS S120: Operating Manual (20 pages), Getting Started (32 pages), Manual (41 pages), Short Description (22 pages), Manual (43 pages), Instruction For Installation In Cabinets For Marine Drive Applications (28 pages), Applications Manual (46 pages), Operating Instructions Manual (22 pages), Getting Started (32 pages), Operating Instructions Manual (21 pages), Engineering Manual (30 pages), Commissioning Manual (20 pages)

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Siemens SINAMICS S120 Applications Manual
8.5

External auxiliary power supply

It is possible to connect an external 24-V-DC auxiliary power supply. This allows the Control
Unit to be operated independent of the main circuit (DC link).
Control/auxiliary circuits in the converter must fulfill PELV specifications.
It is not permissible to supply the control/auxiliary circuits directly from a 24-V-DC onboard
power supply. A switched-mode power supply must be connected in between in order to
obtain an electrically decoupled, regulated and "disturbance-free" 24-V power supply.
This switched-mode power supply must comply with interference immunity requirements as
laid down in IEC 60533 and those laid down in IACS "Requirements concerning
ELECTRICAL INSTALLATIONS".
Using SINAMICS G120 / G120C / S120 Blocksize converters in marine applications
Application Manual, 11/2019, A5E48346362A
Marine-specific installation regulations
8.5 External auxiliary power supply
31