Protecting Against Longer Power Failures - Siemens SITOP PSU8200 Manual

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 61)).
Figure 9-6
Using the free-of-charge SITOP DC-UPS software tool, DC-UPS systems can be simply
integrated into PC-based automation solutions. This supports further processing of the status
signals and safely running down the PC.
You can find additional information at:
Manual, DC UPS with capacitors
(http://support.automation.siemens.com/WW/view/en/48932766/133300)
SITOP PSU8200 1ph
Manual, 11.2014, C98130-A7633-A1-3-7629
24 V buffering to allow the saving of process data and controlled shutdown of PCs
9.6 Protecting against longer power failures
Applications
61