Safety instructions 11
Grounding
These instructions are intended for all persons that are responsible for the
grounding of the drive.
• At installation sites that are above 2000 m (6562 ft), the terminals of the
RMIO board and option modules attached to the board do not fulfill the
Protective Extra Low Voltage (PELV) requirements in EN 50178.
WARNING! If you ignore these instructions, it can cause physical injury,
death, increased electromagnetic interference and equipment
malfunction:
• Ground the drive, motor and adjoining equipment to ensure personnel
safety in all circumstances, and to reduce electromagnetic emission and
interference.
• Make sure that the grounding conductors are adequately sized as required
by the safety regulations.
• In a multiple-drive installation, connect each drive separately to the
protective earth (PE).
• In European CE compliant installations and in other installations where EMC
emissions must be minimized, make a 360° high-frequency grounding of
the cable entries in order to suppress electromagnetic disturbances.
In addition, connect the cable shields to the protective earth (PE) in order to
meet safety regulations.
• Do not install a drive with EMC filter option +E202 or +E200 on an
ungrounded power system or a high-resistance-grounded (more than
30 ohms) power system.
Notes
• Power cable shields are suitable for equipment grounding conductors only
when adequately sized to meet safety regulations.
• As the normal leakage current of the drive is more than 3.5 mA AC or
10 mA DC (EN 50178, 5.2.11.1), a fixed protective earth connection is
required. In addition, we recommend that you use:
• a cross-section of the protective earthing conductor of at least 10 mm
2
Cu
or 16 mm
2
Al,
or
• an automatic disconnection of the supply in case of discontinuity of the
protective earthing conductor,
or
• a second protective earthing conductor of the same cross-sectional area
as the original protective earthing conductor.
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