Protecting Against Longer Power Failures - Siemens SITOP PSU100S Operating Instructions Manual

Applications

9.6 Protecting against longer power failures

9.6 Protecting against longer power failures
Sudden and longer failures of the line supply voltage can result in undefined states and
significant danger as a result of the associated failure of the plant or system control. The
SITOP power supply product portfolio includes various DC-UPS solutions to prevent the
failure of the 24 V power supply voltage.
Power supply failures up into the minutes range can be buffered using the maintenance-free
SITOP UPS500 DC-UPS modules based on capacitors (Figure 9-6 24 V buffering to allow
the saving of process data and controlled shutdown of PCs (Page 66)).
Figure 9-6
66
24 V buffering to allow the saving of process data and controlled shutdown of PCs
Operating Instructions, 02.2013, C98130-A7589-A1-3-7629
SITOP PSU100S