°
Group 1: Cables very sensitive to interference, such as analog measuring
cables
°
Group 2: Cables sensitive to interference, such as sensor cables, communi‐
cation signals, bus signals
°
Group 3: Cables which are a source of interference, such as control cables
for inductive loads, motor brakes
°
Group 4: Cables which are powerful sources of interference, such as output
cables from frequency inverters, welding system power supplies, power
cables
w
Cables in groups 1, 2 and 3, 4 must be crossed at right angles,
see figure 5
.
w
Cables in groups 1, 2 and 3, 4 must be routed in different cable channels or
metallic separators must be used,
see figure 6
and
see figure 7
. This applies
particularly where cables of devices with a high level of radiated emission,
such as
frequency converters, are laid parallel to sensor cables.
1
2
4
3
1
2
4
3
90
90
Figure 5: Cross cables at right angles
1
2
3
4
Figure 6: Ideal laying – Place cables in different cable channels
1
2
3
4
Figure 7: Alternative laying – Separate cables with metallic separators
NOTE
Prevent equipotential bonding currents via the cable shield with a suitable grounding
method,
see "Safety", page 17
.
6
ELECTRICAL INSTALLATION
18
O P E R A T I N G I N S T R U C T I O N S | OLS10
8022017.10HG/2018-07-18 | SICK
Subject to change without notice
