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S7-300 Automation System, Hardware and Installation: CPU 312IFM - 318-2 DP
5-8 A5E00203919-01
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The figure below shows the arrangement of eight signal modules on one rack.
SF
BUSF
DC5V
FRCE
RUN
STOP
SIEMENS
CPU
PS
SM1
SM2
SM3
SM4
SM5
SM6
SM7
SM8
Figure 5-4 Maximum configuration on one rack
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You will find information about the current consumption of modules in the technical
specifications, for example, in the 60RGXOH'DWD5HIHUHQFH0DQXDO or in the
5HIHUHQFH0DQXDO of the CPU you are using