Requirements for EMC-compliant installation

• You must use suitable measures to ensure that the safe control cables are routed separately from the power cables of the drive. This does not apply to cables approved by SEW‑EURODRIVE specifically for this application case.
• Use cable ducts with at least 2 chambers and an uninterrupted separation strip for spatial separation of control cables and energy cables.
• The control cables include the following connection cables:
• Encoder cables
• Analog sensor cables
• Communication cables
• Extra-low voltage cables
• The energy cables include the following connection cables:
• Power supply cables
• Motor cables
• Brake cable
• Use closed cable ducts made of galvanized sheet steel for the fixed routing of cables in systems so that shielding is provided in all directions. Connect the joints of the cable ducts with each other over a large area.
• When grounding cable ducts (e.g. with grounding straps), ensure that the contact surface is as large as possible due to slotted holes and other mounting openings.
• For high-frequency-suitable grounding, use special grounding straps whose connection points have a sufficiently large surface area. Do not use crimped eyelets.
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• Mount grounding straps over the entire surface on well-conducting surfaces. Contact points must be free of paints and other substances. Do not use washers:
• The drag chains are made of plastic. Grounding must be conducted separately.
• Grounding cables suitable for high-frequency use must be routed separately.
• Grounding cables suitable for high-frequency use should be designed as short as possible.
• Grounding cables suitable for high frequencies must not be used as equipotential bonding.
• The cable should consist of a large number of fine wires (surface, flexibility).
• The connection pieces should be suitable for HF.
• Cable carriers do not provide shielding or separation of cable types. The following possible solutions are available:
• Separation of the cable types into several cable carriers.
• Only use shielded cables.
• Route cables of the various cable types with a distance of at least 200 mm to each other.
• Observe the spatial separation also in distributors. Use metal distributors with partition walls or several individual distributors.
• Always keep the cables short. Observe the permitted cable lengths specified in the product manuals of the products used!
• Keep the necessary reserve loops as short as possible and do not bundle them closely with other cables.
• The shield must be connected on both sides, as shields connected on one side have no effect against the magnetic disturbances.
• Connect shield terminals directly to the local grounding star point.
• For shielded cables, only use connectors with special contact springs for the shield. Follow the manufacturer's instructions.
• Connect the shield to the metal housing over a large area using a suitable cable bushing or shield terminals. Do not use pigtails for shield connection in terminal strips. The pigtail is an antenna that greatly weakens the shielding effect.
• The following figures show examples of the connection of the control cable shielding.