Architectural Requirements for Wiring Category 1
Designated architecture for Category 1 is defined in EN ISO 13849-1, 6.2.4.
Designated architecture for Category 1 (EN ISO 13849-1)
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I: input device |
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L: logic |
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O: output device |
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im: interconnecting means |
SRP/CS, the safety-related part of the control system, of Wiring Category 1 must be designed and constructed using well-tried components.
A “well-tried component” for a safety-related application is a component which has been either:
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widely used in the past with successful results in similar applications, or
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made and verified using principles which demonstrate its suitability and reliability for safety-related applications.
There is no diagnostic coverage (DCavg = none) within Category 1 systems.