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v6rev 12025-08-04IEC 61508-4 MOD

mode of operation (SIL)

0112/2///61987#ABB910

way in which a safety-related system is intended to be used, with respect to the frequency of demands made upon it, which may be either low demand mode, where the frequency of demands for operation made on a safety related, system is no greater than one per year and no greater than twice the proof-test, frequency; or high demand or continuous mode, where the frequency of demands for operation made, on a safety-related system is greater than one per year or greater than twice the proof check frequency

Used by classes
2
property
Code
ABB910
Data type
Used by classes (2)

Version history7#

  1. Current rev 01
    04 Aug 2025 · 15:30 UTC by BATCH 00000849
    View on cdd.iec.ch ↗
  2. superseded rev 01
    24 Feb 2020 · 11:58 UTC by BATCH 00000774
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  3. superseded rev 01
    28 Mar 2018 · 07:26 UTC by BATCH 00000762
    ↓ Version JSON
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  4. superseded rev 01
    20 Mar 2018 · 12:23 UTC by BATCH 00000755
    ↓ Version JSON
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  5. superseded rev 01
    01 Mar 2017 · 14:51 UTC by BATCH 00000732
    ↓ Version JSON
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  6. superseded rev 02
    18 Jun 2014 · 13:41 UTC by BATCH 00000702
    ↓ Version JSON
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  7. superseded rev 01
    08 Apr 2014 · 17:25 UTC by BATCH 00000699
    ↓ Version JSON
    View on cdd.iec.ch ↗

IEC CDD records every published revision of each entity — version number, status, timestamp, and the change request that introduced it. OpenCDD captures the full chain of custody from cdd.iec.ch; the entry marked Current is the one rendered on this page.

Metadata#

Source document
IEC 61508-4 MOD
Version
6
Revision
1
Status
Standard
Publisher
IEC
Published in
IEC 61987
Responsible committee
IEC/SC 65E
Change request
C00185
Dates
  • Original: 2017-12-07
  • Current version: 2025-08-04
  • Current revision: 2025-08-04