The DC UPS modules supplement 24 V SITOP power supply units for interruption-free rated currents of up to 40 A. They are based on maintenance-free lead-gel or LiFePO4 batteries. With integrated electronics, the SITOP UPS1600 automatically detects battery type and charges it with an optimum temperature-controlled charging characteristic curve. Intelligent battery management monitors all relevant data, even for parallel-connected battery modules. The battery status and various actual values are output via Ethernet/PROFINET and USB interfaces. A web server allows for remote diagnosis. The low-profile SITOP UPS1600 DC-UPS module offers dynamic overload behavior, suitable for switching on industrial PCs. High charge current quickly restores buffer readiness after a supply system failure. The UPS can be activated from the battery for missing supply system voltage for stand-alone operation.