Safety Application Suitability Levels

Safety Application Suitability for PointMax Safety Input Modules
Suitability Level
Conditions
Notes
Applications that are rated up to, and including, SIL 2 as defined in IEC 61508, and PLc, Cat. 2 as defined in ISO 13849-1
The modules uses single-channel mode:
  • Point mode is Safety Pulse Test
  • Point mode is Safety
Consider the following:
  • The channel mode type, that is, single or dual, affects Performance Level and Category. You can use the modules in SIL 3 applications regardless of channel mode type.
  • To achieve SIL 3 single-channel, the sensor that is used must be SIL 3 single-channel as well.
  • The requirement that Point mode be Safety Pulse Test assumes that only the safety I/O module provides diagnostics to a specific Suitability Level.
The larger safety system within which the safety I/O module resides can provide the diagnostics necessary to achieve the stated Suitability Level without the requirement that Point mode be Safety Pulse Test.
To achieve the specific Safety Integrity Level, see the wiring diagrams for the respective safety module.
Applications that are rated up to, and including, SIL 3 as defined in IEC 61508, and PLe, Cat. 4 as defined in ISO 13849-1
The modules use single-channel mode:
  • Point mode is Safety Pulse Test
  • Point mode is Safety
  • External Wiring Fault exclusion – Faults by the external cabling out of the protective enclosure must be avoided according to the requirements for fault exclusion by EN ISO 13849-2, Table D.4.
    This can be handled by at least one of these measures:
    • Separate multicore cables
    • Individually shielded with earth connection
The modules use dual-channel mode:
  • Point mode is Safety Pulse Test
The modules use dual-channel mode:
  • Point mode is Safety
  • External Wiring Fault exclusion – Faults by the external cabling out of the protective enclosure must be avoided according to the requirements for fault exclusion by EN ISO 13849-2, Table D.4.
    This can be handled by at least one of these measures:
    • Separate multicore cables
    • Individually shielded with earth connection
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