3 Installation
3.3 Communication cables
30
Compact PLC XC-152
05/17 MN050001ZU EN www.eaton.com
Figure 5:
prefabricated SUB-D plug
A Cable with sheath
B Heat-shrink tubing or rubber grommet
C Strap
D Screen braid
E SUB-D plug
F Fixing screw UNC
3.3.2 Screening the communication cables used
In order to ensure that signals are transmitted without noise so as to comply
with EMC B requirements, the communication cables used must be
screened.
▶
Use screened cables or screen the cables yourself with a ferrite ring
such as:
Würth STAR-RING snap-together ferrite, split ferrite core, 30 x 20 x 20
mm, for cables with a diameter of 8 mm
Würth STAR-GAP snap-together ferrite, split ferrite core, 31.5 x 35 x
28.3 mm, for cables with a diameter of 13 mm
▶
Make sure to properly place the ferrite ring on the communication cable
at a location close to the connection side (max. distance of 20 cm from
the external device plug) on the device.
A
B
C
D
E
F
Figure 6:
Screening with
snap-together ferrite ring
Figure 7:
Ethernet cable shielding example:
double loop through ferrite core
