Siemens SINAMICS S120 Equipment Manual page 55

Shield connection
● Shields must not be used to conduct electricity. In other words, they must not
● Apply the shields so that they cover the greatest possible surface area. You can use
● Avoid extending the shield to the grounding point using a wire (pigtail) because this will
● Attach the shield to a shield bar directly after the cable inlet into the cabinet. Insulate the
I/O interfacing
● Create a low-impedance ground connection for additional cabinets, system components,
● Ground unused cables at one end in the cabinet.
● Choose the greatest possible clearance between the power and signal cables (at least 20
● Avoid unnecessarily long conductor loops.
S120 Cabinet Modules Equipment Manual
Manual, (GH5), 10/2008, A5E00427098A
simultaneously act as neutral or PE conductors.
ground clamps, ground terminals, or ground screw connections.
reduce the effectiveness of the shield by up to 90%.
entire shielded cable and route the shield up to the device connection.
Figure 4-5 Shield connection with clip
and distributed devices with the largest possible cross section (at least 16 mm²).
cm). The greater the distance over which the cables are routed in parallel, the greater the
clearance must be. If a sufficient clearance cannot be maintained, you must install
additional shields.
Electrical installation
4.4 EMC-compliant design
55