Siemens SIMATIC S7-1500 System Manual page 81

Wiring
6.8 Front connector for the I/O modules
3. Put the strain relief (cable tie) around the cable harness, and pull the strain relief for the
cable harness tight (Figure 2).
Figure 6-12
4. Insert the shield clamp from below into the shielding bracket in order to connect the cable
shielding (Figure 3).
Figure 6-13
Functions of the shield contact
The shield contact:
● Is needed to apply cable shields (e.g., for analog modules)
● Interference currents on cable shields are diverted from the shield connection to ground
via the mounting rail. The shielding connection is not required at cable entry into the
switchboard.
80
Wiring front connectors for I/O modules with shield contact element (2)
Wiring front connectors for I/O modules with shield contact element (3)
S7-1500 Automation System
System Manual, 02/2014, A5E03461182-AB