Cable Shielding And Routing; General Information - Siemens SINAMICS S120 Combi Equipment Manual

12.7

Cable shielding and routing

12.7.1

General information

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:
● Line supply cables from the line filter via the line reactor to the S120 Combi Power
● All motor cables (if necessary, including cables for motor holding brake)
● Cables for analog direct voltage/current signals
● Signal cables for sensors
● Cables for temperature sensors
A suitable PE conductor must be connected to all devices in protection class I.
The PE conductor connection of the individual components must have at least 4 mm².
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 connection point and line filter, make sure that no interfering cables
are routed in parallel.
The cable shields must be connected to the shield bars through a large surface area.
For components that do not have any special shield connection or where the shield
connection is not sufficient, the cable shields can be connected to the metal mounting plate
using hose clamps and toothed rails. The cable length between the shield contact point and
the terminals for cable cores must be kept as short as possible.
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 steel sheets (e.g. between the mounting plate and rear wall) should
provide adequate shielding.
SINAMICS S120 Combi
Manual, Edition 05.2010, 6SL3097-4AV00-0BP0
Module
DANGER
Cabinet design and EMC
12.7 Cable shielding and routing
255