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ISO/TR 24119:2015

Safety of machinery -- Evaluation of fault masking serial connection of interlocking devices associated with guards with potential free contacts

General information
Valid from 13.11.2015
Directives or regulations
None
Standard history
Status
Date
Type
Name
13.11.2015
Main
ISO/TR 24119:2015 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.
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