Earthing; Shielding - Pilz PMCtendo DD5 Operating Manual

Wiring
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The EMC product standard EN 61800-3, which contains limit values and test methods
for noise emission and immunity for adjustable speed electrical power drive systems
(PDS):
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Measures for ensuring the wiring is EMC-compliant are:
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Earthing

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Shielding

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Filter
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Chokes
6.5.1 Earthing
Earthing measures are a prerequisite for the effective use of additional EMC measures
such as shielding or filters:
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All earthing points should be fed directly to the central earth bar (equipotential bonding
bar).
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The connections must be low impedance and must be good conductors.
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Connections should be kept as short as possible.
} Connections to the earth bar should always be in star form.
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Connections should be protected from corrosion.
} Flexible earthing straps should be used on moving earth parts (e.g. machine parts,
gates). Ensure these earthing straps are as short and wide as possible.
} Unused wires in a cable should be earthed at both ends.
6.5.2 Shielding
Shielding measures reduce noise energy (immunity of adjacent systems and devices to ex-
ternal influences):
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Correct shielding of the following cables avoids interference coupling with
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Operating Manual PMCtendo DD5
1002236-EN-04
Noise immunity: "Second environment" category (industrial environment)
Noise emission:
Category C2 (length of motor cable ≤ 10 m)
Category C3 (length of motor cable ≥ 10 m)
WARNING!
In a residential environment this product may cause high-frequency noise,
so that suppression measures may be required.
Motor cables
Cables to the external brake resistor
Encoder cables
Cables with digital and analogue signals
Cables to communications interfaces
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