A triplex system looses one channel, the system is now,
- fail passive
- fail operational
- fail redundant
Explanation from PART66Online
Losing one channel of a triplex system leaves two channels, which can detect a further disagreement and disconnect safely without a hazardous out-of-trim condition. That two-channel state is fail passive; it can no longer continue controlling through a second fault, so it is not fail operational.
J
Jordi asked · 19 Nov 2022
shouldnt this be fail operational? it still has 2 channels
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