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S7-300 Automation System, Hardware and Installation: CPU 31xC and CPU 31x
A5E00105492-03
5-7
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The number of racks you need will depend on your application.
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•
Compact, space-saving use of all your modules
•
Centralized use of your modules
•
Fewer signals to be processed
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•
More signals to be processed
•
Insufficient slots available
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:
If you opt for installation on a single rack, insert a dummy module to the right of the
CPU (order no.: 6ES7 370-0AA01-0AA0). This gives you the option of inserting a
second rack for your application in the future, simply by replacing the dummy
module with an interface module and without having to reinstall and rewire the first
rack.
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The following rules apply to single-rack module installations:
•
No more than eight modules (SM, FM, CP) may be installed to the right of the
CPU.
•
All modules mounted on a rack must not consume more than a total of 1.2 A
from the S7-300 backplane bus.
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is listed under the technical data, e.g.
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or in
the
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for your CPU
