Siemens SIMATIC S7-1500 Automation System System Manual page 66

Wiring
6.8 Front connector for the I/O modules
Preparing and wiring front connectors for I/O modules without shield contact element
Proceed as follows to wire the front connector:
1. As needed, switch off the load power supply.
2. Swing the front cover of the wired I/O module up until the front cover latches (Figure 1).
3. Bring the front connector into the pre-wiring position. To do this, hook the front connector
4. Place the included cable strain relief (cable tie) for the cable harness into the front
5. Begin to completely wire the front connector.
6. Put the strain relief around the cable harness, and pull the strain relief for the cable
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into the bottom of the I/O module and swivel the front connector upward until the front
connector latches (Figure 2).
Result: In this position, the front connector still protrudes from the I/O module (Figure 3).
However, front connector and I/O module are not yet electrically connected. By means of
the pre-wiring position, you can easily wire the front connector.
Figure 6-7 Wiring front connectors for I/O modules without shield contact element
connector (Figure 4).
harness tight.
S7-1500 Automation System
System Manual, 01/2013, A5E03461182-01