Siemens S7-1500 Manual page 28

Connecting
4.3 Connecting components
3. Place the front connector in the pre-wiring position. This is done by fitting the bottom of
Note
In this position, the front connector module is still protruding from the I/O module (see
figure above). The front connector module and I/O module are not yet electrically
connected.
The pre-wiring position makes it easy to wire the front connector module.
4. If required, connect the cables for the I/O module supply voltage to the front connector
5. Connect the connecting cables to the front connector module.
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the front connector into the I/O module and swiveling up the front connector until it
latches into place.
Figure 4-5 Front connector module in the pre-wiring position (example)
module.
Figure 4-6 Connecting the supply voltage cables and connecting cables to the front connector
module (example)
SIMATIC TOP connect for S7-1500 and ET200MP
Manual,