°
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 out‐
put cables from frequency inverters, welding system power supplies, power
cables
b
Cables in groups 1, 2 and 3, 4 must be crossed at right angles,
.
b
Cables in groups 1, 2 and 3, 4 must be routed in different cable channels or
metallic separators must be used,
. 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 3: Cross cables at right angles
1
2
3
4
Figure 4: Ideal laying – Place cables in different cable channels
1
2
3
4
Figure 5: Alternative laying – Separate cables with metallic separators
NOTE
Prevent equipotential bonding currents via the cable shield with a suitable grounding
method,
6
ELECTRICAL INSTALLATION
14
O P E R A T I N G I N S T R U C T I O N S | MPS-C
8019721.1FIH/2022-06-01 | SICK
Subject to change without notice
