Residual Risks Of Power Drive Systems - Siemens SIMATIC S7-1500 System Manual

Safety information

2.2 Residual risks of power drive systems

2.2 Residual risks of power drive systems
When performing the risk assessment for a machine or plant in accordance with the
respective local regulations (e.g. EC Machinery Directive), the machine manufacturer or plant
constructor must take into account the following residual risks associated with 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 cables
– 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-rays, 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
20
Symbol Meaning
Note that a device of Protection Class III may only be supplied with a protective
low voltage according to the standard SELV/PELV.
IEC 60417-1-5180 "Class III equipment"
Be aware that the device is only approved for the industrial field and only for in-
door use.
Note that an enclosure is required for installing the device. Enclosures are consid-
ered:
• Standing control cabinet
• Serial control cabinet
• Terminal boxes
• Wall enclosure
and connections
components
SIMATIC Drive Controller
System Manual, 11/2023, A5E46600094-AD