Permitted voltage systems

TN and TT systems – voltage systems with directly grounded star point

Use is possible without restrictions.

IT systems – voltage systems with non-grounded star point

Use is only permitted with adherence to the following measures:

1. Remove all existing EMC contact screws from all devices only when used in IT systems. The positions of the EMC contact screws can be found in the product manual > chapter Device structure.
2. Mark this on the nameplate in the "IT system activated" box provided for this purpose.
3. The MOVIDYN^® decentralized servo system does not have EMC contact screws. Use in IT networks is not recommended.

INFORMATION: The EMC limit values for interference emission are not specified for voltage supply systems without grounded star point (IT systems). The effectiveness of line filters is severely limited.

Voltage systems
with grounded outer conductor

Use is prohibited.