Installing   
3.2 EMC-compliant installation of a machine or system 
  Power Module PM240-2 
24  Hardware Installation Manual, 01/2020, A5E33294624B AL 
Measures required for several control cabinets 
●  Install equipotential bonding for all control cabinets. 
●  Screw the frames of the control cabinets together at several locations through a large 
surface area using serrated washers to establish a good electrical connection. 
●  In plants and systems where the control cabinets are lined up next to one another, and 
which are installed in two groups back to back, connect the PE bars of the two cabinet 
groups at as many locations as possible. 
 
Figure 3-2  Grounding and high-frequency equipotential bonding measures in the control cabinet 
and in the plant/system  
Further information 
Additional information about EMC-compliant installation is available in the Internet: 
 EMC installation guideline 
(http://support.automation.siemens.com/WW/view/en/60612658)