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

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

5.4 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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5.4.1

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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External brake resistor ( Mounting Instructions of the brake resistor)
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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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Fieldbus communication (e.g. CANopen, PROFIBUS, ...)
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Safety system
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The following connections need not be shielded:
Mains
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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
Extensively apply shielding directly in the plugs.
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Apply shielding above EMC cable glands.
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EDS84DG752 EN 5.0
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Installation
Shielding
5
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