8536IB1904EN-04

Diagnostic Monitoring

As the diagnostic monitoring occurs immediately upon demand of the safety function, the overall time to detect the fault and to bring the machine to a non-hazardous condition should be shorter than the time to reach the hazardous area.

According to ISO 13849-2, 9.2.3, for Category 2: The MTTFd * of the monitoring equipment should be greater than half of the MTTFd of the logic. The contribution of the TeSys island to the MTTFd of the diagnostic monitoring is MTTFd > 100 years.

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