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12.6
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 12-7 24 V buffering to allow the
saving of process data and controlled shutdown of PCs (Page 101)).
Figure 12-7
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 more information at:
Manual, DC UPS with capacitors
(https://support.industry.siemens.com/cs/ww/en/ps/18042/man)
Using the SITOP UPS1600 DC UPS and battery modules SITOP BAT1600 or SITOP UPS1100,
buffer times in the range of hours can be implemented. Intelligent battery management
using Energy Storage Link automatically detects the energy storage device, and ensures
optimum temperature-controlled charging and continuous monitoring. The UPS1600 with its
digital inputs/outputs as well as optional USB interface or Ethernet/PROFINET port can be
flexibly integrated into the widest range of automation applications.
SITOP PSU8400
Equipment Manual, 04.2024, A5E52642642-1-76
24 V buffering to allow the saving of process data and controlled shutdown of PCs
12.6 Protecting against longer power failures
Applications
101
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