EMC requirements on cable routing (EMC information)
Manual Single Power Unit BUM64S/A/F
Document no.: 5.01056.03
Baumüller Nürnberg Electronic GmbH & Co. KG
54
6.7
h
you achieve the lowest possible effective antenna height by routing the cable directly
alongside of a metallic surfaces.
figure 17: Reducing effective antenna height
h
you should route all lines as close as possible to the conductors of the ground system
to reduce the effective loop area for magnetic coupling.
figure 18: Reducing loop area
h
when parallel-routing signal and control lines across power cables, the conductors
must at least be 20 cm apart.
h
lines of different EMC categories should only cross at an angle of 90°.
h
for symmetrical signal transmission form twisted pair cables and twist those against all
other twisted pairs (e.g. for differential amplifier inputs used for speed setpoint value).
h
the appliance-to-ground plate earth connection should be as short as possible
(< 30 cm). Use large cross-sections (> 10 mm
2
).
h
the PE-connection on the load side of the filter to the mounting plate should be carried
out low-impedant. Ideal is a galvanized metal angle piece or a high frequency earth
band.
h
keep a distance of at least 20 cm between converter and its cabling and
m
disturbance sources as circuit breakers, transformers, line reactors and
m
disturbance sensitive modules like
µ
Ps, bus systems etc.
h
avoid reserve loops on overlong cables.
h
the grounding on reserve conductors in cables is mandatory (additional screening is
achieved, you avoid capacitive coupled hazardous contact voltages coupled in).
h
do not arrange net filters in parallel.
Summary of Contents for BUM64A
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