What does “2-out-of-3 voting” mean in instruments?
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This post was last edited by 2005180005 on 2017-11-21 17:53. What does “two-of-three voting” mean in the instrument?
If two out of the three measurement points meet the criteria, it triggers a linkage – that’s roughly what it means
Three measurement points are involved in interlocking; when two of these points reach the interlocking threshold, interlocking is triggered, which is referred to as \"three-out-of-two\". “\"Two-out-of-three voting\" is more commonly seen in SIS or ESD systems, where three channels participate in the voting process; when the statuses of two channels are identical, the status shared by those two channels is outputted, usually representing an interlock condition.
For the same parameter under test, signals from three measuring instruments are sent to the interlock system at the same time; the interlock will activate only when two of the measurement signals simultaneously meet the interlock conditions. Prevent malfunction.
It usually involves some interlock designs. In areas where significant losses occur when an interlock shutdown takes place, such designs are implemented to reduce instrument failures and errors. For each detection point, three measuring instruments are used; only when the readings from two of these instruments simultaneously meet the interlock conditions will the interlock be activated. If the reading from just one instrument meets the interlock conditions, it is considered to be an error in the reading, and the interlock will not be activated
The chained action is executed only if two out of the three measurement points meet the conditions
Three independent calculations are performed, with the result following the majority vote.
If the interlock value is reached, two out of the three must simultaneously reach that value for the interlock to activate.
“The \"two-out-of-three voting\" mechanism is commonly used in SIS or ESD systems, where a particular parameter has three input (output) channels; when the statuses of two of these channels are identical, the status shared by those two channels is adopted, and this approach is often used for interlocks
2oo3 is a redundancy design that takes safety and production into account, offering higher safety performance. There are 3 sensors; when the interlock values are reached in 2 of them, the interlock device will activate.
If all three are achieved simultaneously, is that also a chain reaction? I think so, but I’ve never encountered it. . After all, there is a time delay in signal transmission. .