Siemens SIMATIC S7-1500 System Manual page 30

Application planning
3.2 System and load power supply
Configuration variant with power segments
Figure 3-5
Note
If you make the configuration with TIA Portal, it automatically checks the configuration for
consistency and informs you as of which module you must open up a new power segment.
Reference
Information about the required power is available in the section Power balance calculation
(Page 34).
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
(http://support.automation.siemens.com/WW/view/en/57251228) of the respective modules.
30
Configuration variants with 3 power segments
Automation system
System Manual, 12/2014, A5E03461182-AC