IEC 61139-2 Ed. 1.0 b:2022

Current Revision
Industrial networks - Single-drop digital communication interface - Part 2: Functional safety extensions

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Industrial networks - Single-drop digital communication interface - Part 2: Functional safety extensions

PUBLISH DATE 2022
PAGES 410

Industrial networks - Single-drop digital communication interface - Part 2: Functional safety extensions

IEC 61139-2:2022 specifies the extensions to SDCI in IEC 61131-9 for functional safety. This comprises:

  • a standardized OSSDe interface for redundant switching signals based on IEC 61131-2,
  • minor modifications/extensions to state machines of SDCI to support the safety operations,
  • a lean functional safety communication protocol on top of the standard SDCI communication which is a black channel according to IEC 61784-3:2021,
  • protocol management functions for configuration, parameterization, and commissioning,
  • IODD extensions for functional safety,
  • a Device tool interface to support Dedicated Tools according to functional safety standards.

This document does not cover:

  • communication interfaces or systems including multi-point or multi-drop linkages,
  • communication interfaces or systems including multi-channel or encrypted linkages,
  • wireless communication interfaces or systems,
  • integration of SDCI-FS into upper-level systems such as fieldbuses/FSCPs.
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