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  • BSI
    PD ISO/TR 24119:2015 Safety of machinery. Evaluation of fault masking serial connection of interlocking devices associated with guards with potential free contacts
    Edition: 2015
    $411.69
    / user per year

Description of PD ISO/TR 24119:2015 2015

This Technical Report illustrates and explains principles of fault masking in applications where multiple interlocking devices with potential free contacts (B1 to Bn) are connected in series to one logic unit (K) which does the diagnostics (see Figures 1 to 7). It further provides a guide how to estimate the probability of fault masking and the maximum DC for the involved interlocking devices. This Technical Report only covers interlocking devices in which both channels are physical serial connections.

This Technical Report does not replace the use of any standards for the safety of machinery.

The goals of this Technical Report are the following:

  • guidance for users for estimation of the maximum DC values;

  • design guidance for SRP/CS.

NOTE 1

Interlocking devices with integrated self-monitoring are not included in the scope of this Technical Report.

NOTE 2

Limitation is also given by the diagnostic means implemented in the logic unit.

NOTE 3

This Technical Report is not restricted to mechanical actuated position sensors.



Standard NumberPD ISO/TR 24119:2015
TitleSafety of machinery. Evaluation of fault masking serial connection of interlocking devices associated with guards with potential free contacts
StatusDefinitive
Publication Date2015-11-30
Identical National Standard OfISO/TR 24119:2015
DescriptorsSafety measures, Occupational safety, Accident prevention, Marking, Ergonomics, Machine guards, Equipment safety, Instructions for use, Hazards, Control systems, Control devices, Design, Product design, Risk assessment, Safety devices, Handbooks
ICS13.110 Safety of machinery
CommitteeMCE/3
ISBN978 0 580 86043 0
PublisherBSI
Pages28

About BSI

BSI Group, also known as the British Standards Institution is the national standards body of the United Kingdom. BSI produces technical standards on a wide range of products and services and also supplies certification and standards-related services to businesses.
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