Example: marketing

3 Categories as defined in EN 954-1

ing category 2. In categories 3 and 4, the occurrence of an individual fault cannot lead to the loss of the safety function. In category 4, and whenever reasonably practicable in category 3, such faults are detected auto-matically. Category 4 also offers the ability to withstand an accumulation of unobserved faults.

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  Defined, Categories, Occurrence, 3 categories as defined in en

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