SEW-Eurodrive MOVI-PLC basic DHP11B-T0, Руководство пользователя

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3
Assembly / Installation Instructions
Shielding and routing bus cables
32
Manual – MOVI-PLC
®
basic DHP11B.. controller
3.10 Shielding and routing bus cables
Having the bus cables correctly shielded attenuates parasitic interference, which can
occur in an industrial environment. 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 metal-plated or metallic housing.
• Connect the shielding in the connector over a wide surface area.
• Apply the shielding of the bus line 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 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.