WG 4.5 Functional Safety


The "Functional Safety" working group addresses issues including the following topics in the context of its experience exchange, its concept developments, formulation of requirements to be met by automation solutions and its involvement in national and international standardisation:

  • Prior use devices (NE 130)
  • Electromechanical devices in Safety Instrumented Systems (NE142)
  • Sharing SIS devices for operational use
  • Useful lifetime of SIS devices
  • Explosion protection and functional safety
  • Machine safety and functional safety
  • IT security and functional safety
  • Human factors and functional safety
  • Review IEC 61511
  • Review VDI/VDE 2180


  • Avoidance of extensive and unnecessary expense by active collaboration in all standardisation institutions
  • Development of system solutions
  • Harmonisation in national and international standardisation institutions

Recommendations and worksheets

Please refer to the following list for recommendations (NE) and worksheets (NA) managed by the working group:

No. ▾TitleEditionResponsibleSubject areaInfoComments
0093NE 093Verification of the Safety-Related Reliability of SIS based on Field Experience
Nachweis der sicherheitstechnischen Zuverlässigkeit von PLT-Sicherheitseinrichtungen durch Betriebserfahrung
WG 4.5SafetyAbstract
0106NA 106Flexible proof testing of field devices in safety instrumented systems
Flexible Prüfung von Feldgeräten in PLT-Sicherheitseinrichtungen
WG 4.5SafetyAbstract
0126NE 126Provisions to Safeguard Existing Standards for Process Control System Safety Equipment
Bestandsschutz für PLT-Schutzeinrichtungen
WG 4.5SafetyAbstract
0130NE 130"Prior use"-Devices for Safety Instrumented Systems and simplified SIL Calculation
Betriebsbewährte Geräte für PLT-Schutzeinrichtungen und vereinfachte SIL-Berechnung
WG 4.5SafetyAbstract
0154NE 154Functional Safety in Batch Processes
Funktionale Sicherheit in Batch-Prozessen
WG 4.5SafetyAbstract
0165NE 165BPCS Protection Layers
PLT-Betriebseinrichtungen mit Sicherheitsfunktion
WG 4.5SafetyAbstract