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1.4
Residual risks of power drive systems
When assessing the machine- or system-related risk in accordance with the respective
local regulations (e.g., EC Machinery Directive), the machine manufacturer or system
installer must take into account the following residual risks emanating from the control
and drive components of a drive system:
1. Unintentional movements of driven machine or system components during
commissioning, operation, maintenance, and repairs caused by, for example,
– Hardware and/or software errors in the sensors, control system, actuators, and
– Response times of the control system and of the drive
– Operation and/or environmental conditions outside the specification
– Condensation/conductive contamination
– Parameterization, programming, cabling, and installation errors
– Use of wireless devices/mobile phones in the immediate vicinity of electronic
– External influences/damage
– X-ray, ionizing radiation and cosmic radiation
2. Unusually high temperatures, including open flames, as well as emissions of light,
noise, particles, gases, etc., can occur inside and outside the components under fault
conditions caused by, for example:
– Component failure
– Software errors
– Operation and/or environmental conditions outside the specification
– External influences/damage
3. Hazardous shock voltages caused by, for example:
– Component failure
– Influence during electrostatic charging
– Induction of voltages in moving motors
– Operation and/or environmental conditions outside the specification
– Condensation/conductive contamination
– External influences/damage
4. Electrical, magnetic and electromagnetic fields generated in operation that can pose a
risk to people with a pacemaker, implants or metal replacement joints, etc., if they are
too close
5. Release of environmental pollutants or emissions as a result of improper operation of
the system and/or failure to dispose of components safely and correctly
6. Influence of network-connected communication systems, e.g. ripple-control
transmitters or data communication via the network
For more information about the residual risks of the drive system components, see the
relevant sections in the technical user documentation.
SIMOTICS M-1FE1 synchronous built-in motors
Configuration Manual, 09/2019, A5E47872980B AA
cables and connections
components
Fundamental safety instructions
1.4 Residual risks of power drive systems
19
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