Inovance SV660P Series, Hardware Manual

Page: 155 / 156

Appendix 2 Common EMC Problems and Solutions
‑
154
‑
Figure 6‑2 I/O signal cables with capacitance increased
6.4 RS485&CAN Communication Interference
Take the measures listed in the following table to suppress interference.
No. Measure
1 Install a 120 Ω termination resistor on each end of the bus.
2
Replace with multi‑conductor shielded twisted pair cables and ground both ends
of the shield.
3
Separate communication cables from power cables with a distance of at least 30
cm.
4
Adopt daisy chain mode for multi‑node communication layout.
5
Add an equipotential bonding grounding cable between nodes during multi‑node
communication (see
“
Cabinet system grounding
”
on page 95 ).
6
Install ferrite clamps on both sides of the communication cable or wind the
magnetic ring by one or two turns (see
“
Figure 2–21
”
on page 54 ).
7
Install the magnetic ring on the output side (UVW) of the servo drive by two to four
turns (see
“
Figure 2–20
”
on page 53 ).
8
Use shielded power cables and ground the shield properly.