Application planning
5.2 System and load power supply
Automation system
114 System Manual, 01/2023, A5E03461182-AK
Configuration variant with power segments
Figure 5-5 Configuration variants with 3 power segments
When you configure with STEP 7, STEP 7 automatically checks configuration for consistency
and tells you from which module you must open a new power segment.
Overload in the power segment
If an overload occurs in a power segment, the red SF LED flashes on the system power supply
(PS). All I/O modules to the right of the PS in the power segment will be switched off.
Remedy:
1. Correct the configuration in the power segment of the overloaded PS.
2. Switch the supply voltage power off and on again via the on-off switch on the PS.
3. Switch the CPU from STOP to RUN mode.
Reference
Information about the required power is available in the section Power balance calculation
(Page 121).
Additional information on the performance values (power feed, power consumption) of the
CPU, interface module, system power supply, and I/O modules can be found in the manuals
(https://support.automation.siemens.com/WW/view/en/57251228) of the respective modules.
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