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S7-300 Automation System, Hardware and Installation: CPU 31xC and CPU 31x
A5E00105492-03
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Below you can find two examples of an EMC compatible PLC installation.
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The figure below shows a cabinet installation with the measures described above
(bonding of inactive metal parts to chassis ground and connecting the cable
shielding to ground). This sample applies only to grounded operation. Note the
points in the figure when you install your system.
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Figure 12-2 Example of an EMC compatible cabinet installation