Emc-Compliant Design - Siemens SINAMICS DCM Betriebsanleitung

4.5

EMC-compliant design

The following section provides some basic information and guidelines that will help you
comply with the EMC and CE guidelines. These refer to the connection in the cabinet and to
the cabling outside the cabinet.
Shield supports
Bare shielded cables as appropriate and attach them in the cabinet using shield springs or
ground them reliably to bare metal surfaces. Two-ended shield support is recommended.
Laying the motor supply cable separately
The distance between the motor cable and the signal cables should be >20 cm. If it is
unavoidable that motor cables and signal cables are laid in parallel over long distances, the
motor cables must be twisted or a shielded motor cable must be used.
Cable installation
● Cables that are subject to or sensitive to interference should be laid as far apart from
each other as possible.
● All cables must be laid as close as possible to grounded enclosure parts such as
mounting plates or the cabinet frame. This reduces both radiation of electromagnetic
waves and interference coupling. Use the provided cable ducts in the cabinet.
● Reserve cores of signal and data cables must be grounded at both ends to achieve an
additional shielding effect.
● Shorten long cables or lay them at points that are not sensitive to interference to avoid
additional connecting points.
● If it is impossible to avoid crossing cables, conductors or cables that carry signals of
different classes must cross at right angles, especially if they carry sensitive signals that
are subject to interference.
– Class 1:
– Class 2:
– Class 3:
SINAMICS DCM Cabinet
Operating Instructions, 04/2015, A5E36161239/RS-AA/001
unshielded cables for ≤60 V DC
unshielded cables for ≤25 V AC
shielded analog signal cables
shielded bus and data cables
operator panel interfaces, incremental/absolute encoder lines
unshielded cables for >60 V DC and ≤240 V DC
unshielded cables for >25 V AC and ≤240 V AC
unshielded cables for >240 V AC/DC and ≤1000 V AC/DC
Electrical installation
4.5 EMC-compliant design
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