Installation According To Emc (Installation Of A Ce-Typical Drive System); Shielding - Lenze 8400 Hardware Manual

6 Electrical installation

Installation according to EMC (installation of a CE-typical drive system)

Shielding

6.2 Installation according to EMC (installation of a CE-typical drive system)
Design of the cables
It is imperative to comply with the regulations concerning minimum cross-sections
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of PE conductors. The cross-section of the PE conductor must be at least as large as
the cross-section of the power connections.
The cables used must comply with the approvals required for the location (e.g. UL).
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6.2.1 Shielding
Requirements
The effectiveness of a shielded cable is reached by:
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– Providing a good shield connection through large-surface shield contact.
– Using only braided shields with low shield resistance made of tin-plated or
nickel-plated copper braid.
– Using braided shields with an overlap rate > 70 % and an overlap angle of 90 °.
– Keeping unshielded cable ends as short as possible.
Use system cables or shielded cables for these connections:
Motor
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Feedback systems
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Motor holding brake (shielding is required when being integrated into the motor
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cable; connection to optional motor brake control)
Motor temperature monitoring
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Analog signals (inputs and outputs; single-sided shield connection to the controller)
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System bus (CANopen)
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The following connections need not be shielded:
24-V supply
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Digital signals (inputs and outputs).
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– We recommend to use shielded cables for a cable length from approximately 5 m
on or in environments with strong interferences.
Connection system
Connect the shield with a large surface and fix it with metal cable binders or a
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conductive clamp. ( 11.11)
Connect the shield directly to the corresponding device shield sheet.
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– If required, additionally connect the shield to the conductive and earthed
mounting plate in the control cabinet.
– If required, additionally connect the shield to the cable clamp rail.
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EDS84ASC552 EN 10.0