Siemens Simatic RF600 System Manual page 85

As a rule:
● For analog signal cables, the shield should be connected at one end on the receiver side
● For digital signals, the shield should be connected to the enclosure at both ends
● Since interference signals are frequently within the HF range (> 10 kHz), a large-area HF-
proof shield contact is necessary
Figure 4-9
The shielding bus should be connected to the control cabinet enclosure in a manner allowing
good conductance (large-area contact) and must be situated as close as possible to the
cable inlet. The cable insulation must be removed and the cable clamped to the shielding
bus (high-frequency clamp) or secured using cable ties. Care should be taken to ensure that
the connection allows good conductance.
Figure 4-10
The shielding bus must be connected to the PE busbar.
SIMATIC RF600
System Manual, xx/2014, J31069-D0171-U001-A15-7618
Cable shielding
Connection of shielding bus
4.7 Guidelines for electromagnetic compatibility (EMC)
RF600 system planning
85