Operational Access to SIS Components

Authors

  • Thomas Gabriel Bayer Technology Services
  • Gerhard Versteegen Bayer MaterialScience
  • Bernd SchrÖrs Bayer Technology Services

DOI:

https://doi.org/10.17560/atp.v54i07-08.2174

Abstract

IEC 61511, the technical standard for functional safety in the process industry sector, recommends a strict separation of safety-related and operational functionality. However, providing operational access to components of the safety instrumented system can offer advantages. For such scenarios, the standard demands an additional risk assessment in order to evaluate the overall safety integrity. Using the example of an SIL 3 overpressure protection by means of process control technology, a simple generic method is presented for such an evaluation.

Published

2013-05-21