IndraDrive C and Cs - Routing the Motor Power Cables
With cable duct Without cable duct
B Area B
C Area C
1 Cable duct for mains connection lines
2 Shield connection of motor power cable via
clips at least at one point; alternatively, at the
device or on mounting plate at control cabinet
3 Cable duct for motor power cables
4 Parallel routing of mains connection lines and
motor power cables over a maximum of 300
mm
5 Distance of at least 100 mm or separated by
a grounded distance plate
Fig.6-2: Routing of Motor Power Cables With Cable
Duct
B Area B
C Area C
1 Cable duct for mains connection lines
2 Shield connection of motor power cable via
clips at least at one point; alternatively, at the
device or on mounting plate at control cabinet
3 Control cabinet outlet of motor power cables
4 Parallel routing of mains connection lines and
motor power cables over a maximum of 300
mm
5 Distance of at least 100 mm or separated by
a grounded distance plate
Fig.6-3: Routing of Motor Power Cables Without Cable
Duct
Fig.6-4: Routing of Cables for IndraDrive C and Cs
6.3 Ground Connections
Housing and Mounting Plate
By means of appropriate ground connections, it is possible to avoid the emis‐
sion of interference, because interference is discharged to ground on the
shortest possible way.
Ground connections of the metal housings of EMC-critical components (such
as filters, devices of the drive system, connection points of the cable shields,
devices with microprocessor and switching power supply units) have to be well
contacted over a large surface area. This also applies to all screw connections
between mounting plate and control cabinet wall and to the mounting of a
ground bus to the mounting plate.
The best solution is to use a zinc-coated mounting plate. Compared to a lac‐
quered plate, the connections in this case have a good long-time stability.
Connection Elements
For lacquered mounting plates, always use screw connections with tooth lock
washers and zinc-coated, tinned screws as connection elements. At the con‐
nection points, remove the lacquer so that there is safe electrical contact over
a large surface area. You achieve contact over a large surface area by means
of bare connection surfaces or several connection screws. For screw connec‐
tions, you can establish the contact to lacquered surfaces by using tooth lock
washers.
46/65 Bosch Rexroth AG | Electric Drives
and Controls
Rexroth IndraDrive | Instruction Manual
EMC Measures for Design and Installation
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