Applications
9.3 Series connection for increased voltage
SITOP PSU300S
Manual, 12.2016, C98130-A7587-A1-7-7629
57
Series connection for increased voltage
To achieve an output voltage of 48 V DC, two 24 V SITOP power supplies of the same type
can be connected in series.
Depending on the grounding point of the secondary output voltages, voltages of +48 V,
±24 V or -48 V can be realized.
Note
For additional details, see Catalog KT 10.1 Chapter 15 Technical information and configuring
(see
(
http://w3app.siemens.com/mcms/infocenter/content/en/Pages/order_form.aspx?nodeKey=k
ey_518431&infotype=catalogs
)).
SELV is not guaranteed in the case of a fault
When connecting two power supplies in series, the continuous, permissible SELV voltage
of a maximum of 60 VDC according to EN 60950-1 cannot be guaranteed in the case of a
fault.
Figure 9-4 Series connection
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