Use Of Load Power Supplies - Siemens SIMATIC S7-1500/ET 200MP System Manual

Application planning

5.4 Use of load power supplies

5.4 Use of load power supplies
Introduction
The load current supply (PM) supplies the system power (PS), central modules (CPU),
interface module and input and output circuits of the I/O modules with DC 24 V.
Load current supplies can be mounted on the mounting rail but do not have a connection to
the backplane bus.
Observe the installation rules and specified installation distances in the manuals of the load
current supplies.
Use of multiple load current supplies
Several load current supplies (PM) can be used as follows for higher output currents:
Every load current supply feeds independent 24 V DC load lines.
Alternatively you can use an external 24 V power supply, e.g. from the SITOP line.
Figure 5-13 Supply of the modules from 24 V DC load current suppl
Note
Alternative 24 V supply of the modules from the control cabinet
If safe electrical separation (SELV/PELV according to IEC 61131-2 and IEC 61010-2-201) is
guaranteed, you can alternatively supply the modules with 24 V DC from the control cabinet.
Reference
More information on load current supplies can be found on the Internet
(https://mall.industry.siemens.com) in the online catalog and in the online ordering system.
124
Automation system
System Manual, 01/2023, A5E03461182-AK