Cabling - Siemens sinamics g120 Hardware Installation Manual

Connecting
4.2 EMC-compliant installation
Radio interference suppression
● Connect interference suppressors to all contactors, relays, solenoid valves and motor
holding brakes directly at the coil in order to dampen high-frequency radiation when these
devices are switched off. Use RC elements or varistors for AC-operated coils and
freewheeling diodes or varistors for DC-operated coils.
4.2.4

Cabling

Cable routing inside the cabinet
● Route the power cables of the drive so that there is a minimum clearance of 25 cm to
signal and data cables. Power cables are line, DC link and motor cables – as well as
connecting cables between the Braking Module and braking resistor. Alternatively, the
separation can be realized using metal partitions connected to the mounting plate through
a good electrical connection.
● Route power cables with low noise levels separately from power cables with high noise
levels
– Power cables with low noise level:
– Power cables with high noise level:
● Route the cables so that signal and data cables as well as power cables with low noise
level only cross power cables with a high noise level at right angles.
● Keep the cables as short as possible.
● Route the cables as close as possible to grounded enclosure parts such as mounting
plates or the cabinet frame.
● Route signal and data cables as well as the associated equipotential bonding cables
parallel and as close to one another as possible.
● Route incoming and outgoing cables/conductors within a zone (where unshielded single-
conductor cables are used), twisted or in parallel and as close to one another as possible.
● Ground any unused conductors of signal and data cables at both ends.
● Signal and data cables should enter the cabinet only at one point (e.g. from below).
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- line cables from the line to the line filter
- cables between the line filter and inverter
- DC link cables
- cables between the Braking Module and braking resistor
- motor cables
Power Module PM230, IP20 / Push-through technology (PT)
Hardware Installation Manual, 06/2014, A5E34331322B AA