Siemens SIMATIC S7-1500 System Manual page 52

Attaching the protective conductor
The S7-1500 automation system has to be connected to the protective conductor system of
the electrical system to ensure electrical safety.
1. Strip the grounding conductor with a minimum diameter of 10 mm
2. Slide the enclosed bolt into the T profile groove.
3. Insert the spacer, ring terminal with the grounding connector, flat washer, and lock
4. Connect the opposite end of the grounding cable to the central grounding point /
Note
Alternative grounding of the mounting rail
If it is ensured that the mounting rail is permanently connected to the protective conductor
system using an equivalent installation that complies with standards, for example, by
permanent attachment to a grounded control cabinet wall, grounding via the grounding screw
can be omitted.
Reference
Additional information on the precise dimensions of the mounting rails can be found in the
Dimension drawings of the mounting rails (Page 194) section.
S7-1500 Automation System
System Manual, 02/2014, A5E03461182-AB
terminal for size M6 bolts with the crimping pliers.
washer onto the bolt (in that order). Thread the hexagon head nut, and fasten the
components in place with the nut (torque 4 Nm).
protective conductor busbar (PE).
Figure 5-3 Attaching the protective conductor
Installation
5.2 Installing the mounting rail
and attach a ring
2
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