Siemens Simatic S7-1500/ET 200MP System Manual page 153

Wiring
6.10 Front connector for the I/O modules
6. Bring the front connector into the pre-wiring position. To do this, hook the front connector
into the bottom of the I/O module and swivel it upwards until the front connector latches
(Figure 6).
Result: In this position, the front connector still protrudes from the I/O module (Figure 7).
However, front connector and I/O module are not yet electrically connected.
Figure 6-12
152
Preparing front connectors for I/O modules with shield contact element (2)
Automation system
System Manual, 12/2017, A5E03461182-AE