Siemens SINAMICS S120 Equipment Manual page 9

Residual risks of power drive systems
When carrying out a risk assessment of the machine/plant in accordance with the EU
Machinery Directive, the machine manufacturer/plant operator must consider the following
residual risks associated with the control and drive components of a power drive system
(PDS).
1. Unintentional movements of driven machine components during commissioning,
operation, maintenance, and repairs caused by, for example:
– Hardware defects and/or software errors in the sensors, controllers, actuators, and
– Response times of the controller and drive
– Operating and/or ambient conditions not within the scope of the specification
– Parameterization, programming, cabling, and installation errors
– Use of radio devices / cellular phones in the immediate vicinity of the controller
– External influences / damage
2. Exceptional temperatures as well as emissions of light, noise, particles, or gas caused by,
for example:
– Component malfunctions
– Software errors
– Operating and/or ambient conditions not within the scope of the specification
– External influences / damage
3. Hazardous shock voltages caused by, for example:
– Component malfunctions
– Influence of electrostatic charging
– Induction of voltages in moving motors
– Operating and/or ambient conditions not within the scope of the specification
– Condensation / conductive contamination
– External influences / damage
– Improper protective conductor connection at high leakage currents.
4. Electrical, magnetic, and electromagnetic fields that can pose a risk to people with a
pacemaker and/or implants if they are too close.
5. Emission of pollutants if components or packaging are not disposed of properly.
An assessment of the residual risks of Power Drive System components (see points 1 to 5
above, but excluding point 4) established that these risks do not exceed the specified limit
values.
For more information about residual risks of the Power Drive System components, see the
relevant chapters in the technical user documentation.
Chassis Power Units Liquid Cooled
SINAMICS S120 Equipment Manual, Edition 12/2007, 6SL3097-2AM00-0BP4
connection technology
Foreword
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