Foreword
Booksize power units
12 Manual, (GH2), 06/2008, 6SL3097-2AC00-0BP6
Residual risks of power drive systems
When carrying out a risk assessment of the machine in accordance with the EU Machinery
Directive, the machine manufacturer 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
connection technology
– 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
4. Operational electrical, magnetic, and electromagnetic fields that can pose a risk to people
with a pacemaker and/or implants or metallic objects if they are too close.
5. Release of environmentally hazardous materials and emissions during improper
operation and/or improper disposal of components.
For more information about residual risks of the power drive system components, see the
relevant chapters in the technical user documentation.
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