Power supply using PM and CPU

First of all, nice setup.

The link below describes the difference between PM and PS and what the configuration options are.

https://support.industry.siemens.com/cs/ww/en/view/73191930 

You should choose option number 3, which will leave you with max 60 watts for the communication moduls. i'm not 100% sure of the power requirements of those communication moduls but i think 60W is sufficient for this configuration.

So put a PS on slot 0, for the backbus power and add a PM or any 24V source to power the CPU, set the CPU to "Connection to supply voltage L+". please be aware that a PM has no connection to the backplane bus.

I've added a picture which shows you a setup which gets you the most power to the backplane bus.

Hope this answered you question?

Hello jjjinl;

The link proposed earlier by Veuleman.Jens contains this line:

Further Information
More information is available in the SIMATIC S7-1500 manual underSIMATIC S7-1500, ET 200MP Automation System.

Open this manual, it has a section named System Overview (of the S7-1500, ET 200MP systems) where you can find this information:

https://support.industry.siemens.com/cs/ww/en/view/59191792/125951469579

The chapter named Application Planning has also a few interesting pages discussing PM and PS usage.

Hope this helps,

Daniel Chartier