S7-300 sw redundancy: what rack?

rgua

Lifetime Supporting Member
R
Join Date
Mar 2003
Posts
144
I try realize a S7-300 system with redundancy software. There will be two CPUs and a single rack of I/O modules connected to the CPU by two IM153-2.
1- I'm not interested to the possibility to extract the modules in RUN, must I have an active rack? Is it possible for the IMs only?
2- The active bus modules need a supply?
thanks in advance.
 

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