Siemens SIMATIC S7-1500 System Manual page 92

Wiring
5.10 Front connector for the I/O modules
4. Place the included cable strain relief (cable tie) for the cable harness into the front
connector (Figure 4).
Figure 5-11
5. Swing the front cover up until the front cover latches (Figure 5).
92
Preparing front connectors for I/O modules with shield contact element (1)
Automation system
System Manual, 09/2016, A5E03461182-AD