سلام دوستان بنده به خود شرکت زیمنس ایمیل زدم و جواب که بهم دادند به صورت زیر است:
Dear Mr Abedi,

Thank you for contacting the technical support of Simatic.

Importance of the Backplane Module:
The backplane module (6ES7590-0BL00-0AA0) is critical for the proper functioning of the S7-1500 system. It connects the power supply unit to the PLC and ensures the correct distribution of power and communication signals across modules. Operating the system without this component can lead to electrical irregularities and potentially damage the power supply.

Potential Causes for Power Supply Failure:

Missing Backplane Module: Without the backplane module, the power supply may experience an overload or improper connection, leading to failure.
External Factors: Ensure the input voltage supplied to the power supply (120/230V AC) is stable and within the supported range. Voltage fluctuations or spikes can also cause damage.
Product Defect: Although the products were sealed, manufacturing defects cannot be entirely ruled out.
Recommended Actions:

Replace the burned power supply unit with a new one, ensuring all required components, including the backplane module (6ES7590-0BL00-0AA0), are installed correctly.
Verify the input voltage is stable and within the specified range (120/230V AC). You may use a multimeter or voltage monitoring device for this check.
Ensure proper grounding and secure connections to avoid electrical issues.
Test the system after assembly to confirm normal operation.
Further Investigation:
If the issue persists after replacing the power supply and installing all necessary components, collect the following diagnostic information:

The diagnostic buffer from the connected CPU after the fault occurs.
Details about the power supply environment (e.g., voltage fluctuations, temperature extremes).
Visual inspection of the burned power supply for signs of damage or overheating.
If you suspect a manufacturing defect, you may also consider contacting your regional sales or support team to initiate a warranty claim for the failed power supply unit.

Please let us know if you need further assistance in setting up your system or troubleshooting any additional issues.

Best Regards

Your Technical Support for Digital Industries