
5
Electrical Installation
Installation planning taking into account EMC aspects
Operating Instructions – MOVIFIT
®
-FC
33
5
Electrical Installation
5.1
Installation planning taking into account EMC aspects
Successful installation of decentralized drives depends on selecting the correct cables,
providing correct grounding, and a functioning equipotential bonding.
Always apply the
relevant standards
. Consider the following points:
•
Equipotential bonding
– Low-impedance, HF-capable equipotential bonding must be provided indepen-
dently of the protective earth connection (see also VDE 0113 or VDE 0100
part 540); e.g. by:
– Do not use the line shield of data lines for equipotential bonding.
•
Data lines and 24 V supply
– Must be routed separately from cables subject to interference (e.g. control cables
from solenoid valves, motor cables).
•
Connection between MOVIFIT
®
and motor
– SEW-EURODRIVE recommends using pre-fabricated SEW hybrid cables
especially designed for connecting MOVIFIT
®
units and motors.
•
Line shields
– Must have good EMC properties (high shield attenuation).
– May not serve only as mechanical protection for the cable
– Must be connected to a wide area of the unit's metal housing at the cable ends;
see also section "Connecting the PROFIBUS cable" (see page 47) and section
"Connecting the hybrid cable" (see page 48).
• Large surface area for
connection of MOVIFIT
®
mounting rail to the system
(untreated, unpainted,
uncoated mounting surface)
• Use of flat grounding strips
(HF litz wire) between
MOVIFIT
®
and system
grounding point
• Low-impedance, HF-capable
connection between con-
nected motor and system
grounding point
1597229067
TIP
Additional information is available in the SEW publication "Drive Engineering –
Practical Implementation, EMC in Drive Engineering".
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