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14
Manual – XFE24A EtherCAT Fieldbus Interface
4
Routing and shielding the bus cable
Assembly and Installation
4.3 Routing and shielding the bus cable
Only use shielded cables and connection elements that also meet the requirements of
category 5, class 2 according to IEC11801, edition 2.0.
Correct shielding of the bus cable attenuates electrical interference that may occur in
industrial environments. The following measures ensure the best possible shielding:
• Manually tighten the mounting screws on the connectors, modules, and equipotential
bonding conductors.
• Use only connectors with a metal housing or a metallized housing.
• Connect the shielding in the connector over a wide surface area.
• Apply the shielding of the bus cables on both ends.
• Route signal and bus cables in separate cable ducts. Do not route them parallel to
power cables (motor leads).
• Use metallic, grounded cable racks in industrial environments.
• Route the signal cable and the corresponding equipotential bonding, if necessary,
close to each other using the shortest possible route.
• Avoid using plug connectors to extend bus cables.
• Route the bus cables closely along existing grounding surfaces.
In case of fluctuations in the ground potential, a compensating current may flow via the
bilaterally connected shield that is also connected to the protective earth (PE). Make
sure you supply adequate equipotential bonding according in accordance with relevant
VDE regulations in such a case.