HB-37420-810-01-25F-EN SMX100 Installation manual.docx Page 98 of 260
Version: 25F
The SMX100 module generally detects the following faults in the external encoder system:
• Short-circuits between safety relevant signal lines
• Interruptions in safety relevant signal lines
• Stuck at 0 or 1 on one or all safety relevant signal lines
Each encoder type has further specific diagnoses for fault detection in the external encoder
system assigned. The following list sows the respective diagnostic measures for the individual
encoders, together with the limiting parameters.
Safety note:
• The diagnostic measures obviously have tolerances because of measuring
inaccuracies. These tolerances must b e accounted for in the safety related
assessment.
• The limiting values for the corresponding diagnostic measures are partly
parametrizable or fixed. The diagnostic coverages resulting from this must be
assessed in relation to the application and included in the safety related overall
assessment.
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