Cable Shielding And Routing - Siemens S120 Manual

Cabinet design and EMC for components, Blocksize format

10.4 Cable shielding and routing

10.4 Cable shielding and routing
In order to comply with the EMC requirements, certain cables must be routed apart from
other cables and from certain components. To full EMC requirements, the following cables
must be used with shields:
● Power supply cables from line filter via line reactor to Power Module
● All motor cables (if necessary, including cables for motor holding brake)
● Cables for "fast inputs" of the Control Unit
● Cables for analog direct voltage/current signals
● Signal cables for sensors
● Cables for temperature sensors
Alternative measures (e.g. routing behind mounting plates, suitable clearances) can also be
used provided they have similar results. This excludes measures that relate to the design,
installation, and routing of motor power cables and signal cables. If unshielded cables are
used between the line supply connection point and the line filter, make sure that no
interfering cable is routed in parallel.
The cable shields must be connected as close to the conductor terminal connections as
possible to ensure a low-impedance connection with cabinet ground.
①
②
③
④
Figure 10-1
420
Rear metal panel
Clip to secure the shield of the motor and line cable to the rear metal panel
Motor cable (shielded)
Line supply input (shielded)
Shielding of a PM240-2 Power Module, frame size FSA
Manual, (GH6), 04/2014, 6SL3097-4AL00-0BP4
AC Drive