● Comply with the permissible bending and torsional stress of the cable
Potential equalization
Ensure that there are no compensating current flows via the cable shield of the
CDI cables between device and machine parts while creating the equipotential
bonding.
Shielding
The shielding is an important component of the CDI cable. The shielding is used
to shield the data wires in the cable against electrical interferences from the
environment.
The shielding has to be connected to the potential equalization of the devices to
shield the data wires. In most cases, a connection via the RJ45 plugs is
sufficient.
Avoid collection of dirt at the R45 plug while drawing the cables in the system.
Remove any collection of dirt from the shield surfaces of the RJ45 plug before
plugging it in.
Fig. 10-16: RJ45 plug shielding areas
Additional shielding connection in case of strong electrical interferences and
long cables
In case of strong electrical interferences and long cable lengths, it can be
required to additionally connect the shielding to the earthing potential.
Mount suitable EMC shielding clamp close to the control cabinet PC, the remote
operator display or the Y-repeater.
Ensure that the CDI cable is not crimped when connecting the shielding to the
equipotential bonding. Avoid mechanical stress (tensile, compressive) on the
plug. Use an EMC shielding clamp suitable for the cable diameter. Crimping of
the cable impairs the electrical properties of the CDI cable.
38/57
Mounting, demounting and electric installation
IndraControl VPB 40.4
Bosch Rexroth AG R911376309_Edition 02
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