Cabinet design and EMC for components, Blocksize format
10.4 Cable shielding and routing
SINAMICS S110
Manual, 07/2015, 6SL3097-4AC10-0BP5
231
Clip to secure the shield of the motor and line cable to the rear metal panel
Line supply input (shielded)
Figure 10-1 Shielding of a PM240-2 Power Module, frame size FSA
Alternatively, the cable shields can be connected to them metal mounting plate using pipe
clamps and serrated rails. The cable length between the shield connection point and the wire
terminals must be kept as short as possible.
Shield connection plates and shield connection kits with pre-prepared clip contacts are
available for connecting the shields of power cables used for Power Modules.
All cables inside the cabinet must be connected as closely as possible to parts connected
with cabinet ground, such as a mounting plate or cabinet wall. Ducts made of sheet steel or
routing cables between between steel sheets (e.g. between the mounting plate and back
wall) should provide adequate shielding.
Avoid, where possible, routing non-shielded cables, connected to the drive line-up, in the
immediate vicinity of noise sources, e.g. transformers. Signal cables (shielded and
unshielded) connected to the drive line-up must be laid at a great distance from strong
external magnetic sources (e.g. transformers, line reactors). In both cases, a distance of ≥
300 mm is usually sufficient.
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