Braided Screen Of The Profibus Cable On The Grounded Shield Bus - Siemens Simatic 6ES7 157-0AD81-0 A0 Series Manual

In the case of ...
Buildings
24V DC power supply
cables, signal cables
24V supply
Protection from external electrical influences
The following table shows what you have to look out for to ensure protection
against electrical influences or faults.
In the case of ...
All systems in which the
modules are integrated
Connecting, signal and bus
lines
Signal and bus lines
Braided screen of the PROFIBUS cable
The braided screen of the PROFIBUS cable must be connected to a grounded
shield bus.
S Affix the braided screen with metal cable clips.
S The clip must cover a large portion of the screen and provide good contact.
S Connect the screen to a shield bus directly after the point where the cable
enters the cabinet.
Cabinet
Figure 4-1
DP/PA Link and Y Link Bus Couplings
A5E00193841-01 1
External lightning protection
Internal lightning protection
Safety extra-low voltage with safe electrical isolation (SELV)
... The system is connected to the protective conductor so
that electromagnetic interference can be discharged.
... The cable has been routed and installed correctly.
... Line or conductor strand breaks do not lead to
undefined system states.

Braided screen of the PROFIBUS cable on the grounded shield bus

You must remember ...
Lightning protection
measures (e.g.
lightning conductors)
You must ensure that ...
Wiring
4-3