There are three important principles to be especially considered:
–
Keep all connections as short as possible (in particular the grounding con-
ductors)
–
Use large conductor cross sections (in particular for the grounding conduc-
tors)
–
Create low-impedance, i.e. good and large-sized contacts (in particular for
the grounding conductors)
Pay attention to the following:
–
Use vibration-resistant connections
–
Clean metallic contact areas
–
Use solid plug and screw-type connections
–
Use earth cable shields with clips on a well-grounded metallic surface
–
Do not use aluminium parts
–
Do not use sheath wires
–
Do not use toothed lock washers under screw connections
Fig. 173: Assembly: wrong
Fig. 174: Assembly: correct
Make a connection between the DIN rails and PE (Protective Earth). For this, use an grounding
wire with a minimum conductor cross section of 10 mm
²
.
The wire is connected to the DIN rail with an M6 screw.
A large-area contact of the DIN rail with the metallic mounting plate improves the EMC behavior
significantly, as the disturbances can be discharged more effective.
2.4.4.2
Cable routing
● Route cables meeting the standards.
● Sort the cables into cable groups:
–
Power current cables
–
Power supply cables
–
Signal cables
–
Data cables
System assembly, construction and connection
Overall information (valid for complete AC500 product family) > EMC-conforming assembly and construction
2022/01/31
3ADR010278, 3, en_US
919
