Solutions to Common EMC Interference Problems
‑80‑
No. Step
3
Separate communication cables from power cables with a
distance of at least 30 cm.
4
Add an equipotential bonding grounding cable between
nodes during multi‑node communication (See "
Grounding
the control cabinet system
"
on page 38
).
5
Ensure the length of the cable between two nodes does not
exceed 100 m.
6
Wind the ferrite clamp around the communication cable on
both sides by one or two turns (See "
Installing a magnetic
ring and a magnetic buckle
"
on page 18
).
7
At the drive output side, wind the output U/V/W cable onto a
magnetic ring for two to four turns. For details, see "
Installing a magnetic ring and a magnetic buckle
"
on page
18
).
8
Use shielded power cables and ground the shield properly.
5.3.2 Common I/O Signal Interference
The drive generates strong interference during operation. Although EMC measures are
taken, interference may still exist due to improper wiring or grounding during use.
When the drive disturbs or is disturbed by other devices, adopt the following
measures.
Step
Measure
1
Use shielded cables as the I/O signal cables and connect the
shield to the PE terminal. For details, see "
2.3.4 Control
Cable Shield
"
on page 32
.
2
Reliably connect the PE terminal of the motor to the PE
terminal of the servo drive, and connect the PE terminal of
the servo drive to the PE terminal of the grid.
3
Add an equipotential bonding grounding wire between the
host controller and the servo drive.
4
At the drive output side, wind the output U/V/W cable onto a
magnetic ring for two to four turns. For details, see "
Installing a magnetic ring and a magnetic buckle
"
on page
18
.
5
Increase the filter capacitance for low‑speed DIs. A
capacitance up to 0.1 μF is recommended, as shown in
"
Figure 5–2 I/O signal cables with capacitance increased
"
on
page 81
.
6
Increase the filter capacitance between AI and GND. A
capacitance up to 0.22 μF is recommended.
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