Hi,

Have you solved your issue? 

I could add from the beginning CP1543-1 because I already had the new version of CPU but I have problem with the power segment on the bus.

In my situation I have two CP 1543-1 for each 1513R rack.

When the CPUs are energized with two CP1543-1, the CPU are in "power fail" alarm and watching on TIA, I have the attached situation.

Note: The CP 1543-1 has arrived with a little bus connector to be used behind the Processor.

Thank you in advance

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Split from SIMATIC S7-1500 R/H CPU with CP 1543-1.

Closed because the question has been posted twice. The active topic can be found here:

Redundancy with 1513R. 2 CP1543-1 for each CPU rack. possible?

Kind regards, Moderator_Lan