What is ISO/TR 24119-Evaluation of fault masking serial connection about?
ISO/TR 24119 is an international standard on the safety of machinery that discusses the evaluation of fault masking serial connection of interlocking devices associated with guards with potential-free contacts to ensure protection against machinery hazards.
ISO/TR 24119 is a technical report that 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.
ISO/TR 24119 provides guidance on how to estimate the probability of fault-masking and the maximum DC for the involved interlocking devices. ISO/TR 24119 only covers interlocking devices in which both channels are physical serial connections.
Note1: ISO/TR 24119 does not replace the use of any standards for the safety of machinery.
Note2: Interlocking devices with integrated self-monitoring are not included in the scope of ISO/TR 24119.
Note3: Limitation is also given by the diagnostic means implemented in the logic unit.
Note4: ISO/TR 24119 is not restricted to mechanical actuated position sensors.
Who is ISO/TR 24119-Evaluation of fault masking serial connection for?
ISO/TR 24119 on the evaluation of fault masking serial connection is useful for:
- Interlocking devices manufacturers
- Interlocking devices designers
- Industrial machinery test personnel
- Occupational health and safety departments
Why should you use ISO/TR 24119-Evaluation of fault masking serial connection?
Fault masking is an unintended resetting of faults or preventing the detection of faults in the SRP/CS by operation of parts of the SRP/CS which do not have faults.
ISO/TR 24119 provides you guidance with direct fault-masking, cable fault with unintended reset, methodology for evaluation of DC for series-connected interlocking devices, limitation of DC by effects of series connected devices, simplified method for the determination of the maximum achievable DC and maximum achievable DC for unprotected multicore cable without positive (+U) voltage wire a.
ISO/TR 24119 provides you with the guidance for estimation of the maximum DC values and design guidance for SRP/CS.
The guidance provided by ISO/TR 24119 assist you in improving the performance and quality of interlocking devices and improving the resistance to fault masking by enhancing the design.
With obedience and compliance to ISO/TR 24119, you can enhance the efficacy of the interlocking devices and manufacture a standardized product.
