Siemens SINAMICS S120 Operating Instructions Manual page 10

Safety notes
1.1 General safety instructions
Unexpected movement of machines caused by radio devices or mobile phones
Using radio devices or mobile telephones in the immediate vicinity of the components can
result in equipment malfunction. Malfunctions may impair the functional safety of machines
and can therefore put people in danger or lead to property damage.
• Therefore, if you move closer than 20 cm to the components, be sure to switch off radio
• Use the "SIEMENS Industry Online Support App" only on equipment that has already been
Damage to motor insulation due to excessive voltages
When operated on systems with grounded line conductor or in the event of a ground fault
in the IT line system, the motor insulation can be damaged by the higher voltage to ground.
If you use motors that have insulation that is not designed for operation with grounded line
conductors, you must perform the following measures:
• IT system: Use a ground fault monitor and eliminate the fault as quickly as possible.
• TN or TT systems with grounded line conductor: Use an isolating transformer on the line
Fire due to inadequate ventilation clearances
Inadequate ventilation clearances can cause overheating of components with subsequent
fire and smoke. This can cause severe injury or even death. This can also result in increased
failures and shorter service lives for devices/systems.
• Ensure compliance with the specified minimum clearance as ventilation clearance for the
Unrecognized dangers due to missing or illegible warning labels
Dangers might not be recognized if warning labels are missing or illegible. Unrecognized
dangers may cause accidents resulting in serious injury or death.
• Check that the warning labels are complete based on the documentation.
• Attach any missing warning labels to the components, where necessary in the national
• Replace illegible warning labels.
8
WARNING
devices or mobile telephones.
switched off.
WARNING
side.
WARNING
respective component.
WARNING
language.
Option L34 parameterizing the circuit breaker on the output side
Operating Instructions, 03/2021, A5E02914106A