Siemens Sinamics S120 Function Manual page 383

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Risks must be reduced by designing and implementing the machine accordingly (e.g. by
means of controllers or protective measures suitable for the safety-related functions).
If the protective measures involve the use of interlocking or control functions, these must be
designed according to EN ISO 13849-1. For electrical and electronic control systems,
EN 62061 can be applied instead of EN ISO 13849-1. Electronic controllers and bus systems
must also comply with IEC 61508.
Safety Integrated
Function Manual, (FHS), 07/2016, 6SL3097-4AR00-0BP6
Iterative process for achieving safety
Standards and regulations
10.2 Safety of machinery in Europe
383