7-22 Arranging the Components in the Control Cabinet Rexroth IndraDrive
DOK-INDRV*-SYSTEM*****-PR02-EN-P
Do not use any steel-shielded lines.
The shield of the motor cable mustn't be interrupted by mounted
components, such as output chokes, sine filters, motor filters.
EMC-Optimal Installation in Facility and Control Cabinet
With regard to EMC-optimal installation, a spatial separation of the
interference-free area (mains connection) and the interference-
susceptible area (drive components) is recommended, as shown in the
figures below.
Note: For EMC-optimal installation in the control cabinet use a
separate control cabinet panel for the drive components.
Division into Areas (Zones)
The arrangement in the control cabinet can be seen from Fig. 7-21:
Separation of interference-free area and interference-susceptible
area in control cabinet.
There are three areas to be distinguished:
1. Interference-free area of control section (area A):
This includes:
• supply feeder, input terminals, fuse, main switch, mains side of mains
filter for drives and corresponding connecting lines
• control voltage or auxiliary voltage connection with power supply unit,
fuse and other parts unless connection is run via the mains filter of
the AC drives
• all components that aren't electrically connected with the drive system
2. Interference-susceptible area (area B):
• mains connections between drive system and mains filter for drives,
mains contactor
• interface lines of drive controller
3. Strongly interference-susceptible area (area C):
• motor cable including single strands
Never run lines of one of these areas in parallel with lines of another area
so that there isn't any unwanted interference injection from one area to
the other and that the filter is jumpered with regard to high frequency.
Keep connection lines as short as possible.
For complex systems it is recommended to put the drive components into
a cabinet and the controls into a separate second cabinet.
Badly grounded control cabinet doors act as antennas. It is recommended
to connect the doors to the control section on top, in the middle and on
the bottom via short equipment grounding conductors with a cross section
of at least 6 mm
2
or, even better, via grounding straps with the same
cross section. Make sure connection points have good contact.
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