Electrical Design Guide
‑42‑
Figure 3‑21 The CAN terminals of other devices have no external ground ports.
Recommended CAN communication cable layout
CAN communication devices are susceptible. If they are close to the interference
source when deployed on the field, problems probably occur.
Figure 3‑22 Recommended routing modes
Route the CAN cable and any interfering cable perpendicularly to each other. For
parallel routing, keep a distance D1 greater than 20 cm between the CAN cable and an
R/S/T cable, or keep a distance D2 greater than 50 cm between the CAN cable and a
U/V/W cable. For routing near the cabinet backplate, attach the interfering cable
closely onto the cabinet backplate and keep the CAN communication cable more
than 1 cm away from the cabinet backplate.
Outside the cabinet, route the R/S/T power cable, U/V/W power cable, and CAN
communication cable through three ducts and keep a distance (L3) greater than 20
cm between adjacent ducts. When routing the interfering cable and the CAN
communication cable in one cable duct, separate the cables in accordance with the
preceding principle.
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