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4-9GFK-0787B Chapter 4 PLC Subsystem
Voting with Three Discrete Inputs
For a triplex input group with three inputs present, the GMR software performs 2 out of
3 voting.
Field Input
Data
Input A
Input B
Input C
0
1
1
GMR Software Performs
2 out of 3 Voting
1
Single Input Provided
to Application Logic
Duplex State
1
Default State
0
The Duplex State and Default State are not used when three field inputs are available.