© Brüel & Kjaer Vibro ● S1079330.002 / V04 ● █ Page 123 of 188
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Brüel & Kjaer Vibro │ Instruction
VC-8000 MPS
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17.3.5 For Any XY Pair (2oo2)
The ‘For Any XY Pair (2oo2)’ block performs the logical AND functions across the two channels in an
XY pair and then the logical OR function across all pairs in the group.
Channels X and Y must be UMM channels 1,2 (or 3,4) and have the same channel type. This is
called a channel pair. All paired channels in the selected asset group (“With: The Rack”, or “With:
Motor A”) are included in this logic.
Channel A
Table 17-8) "For any XY Pair Dependent" truth table
This block performs as follows:
1. Logical AND function between the two
channels in the XY pair. This is called “2 out
of 2”. For example: (1X and 1Y).
2. Logical OR function between other pairs in
the selected asset group. For example: (1X
and 1Y) or (2X and 2Y) or (3X and 3Y) or…
3. Bypassed channels are removed from the
logic. For example, If Channel 1X is bypassed the relay logic ((1X and 1Y) or (2X and 2Y)) will
become ((1Y) or (2X and 2Y)).
4. Faulted channels are removed from the logic. For example, If Channel 1X is faulted the relay
logic ((1X and 1Y) or (2X and 2Y)) will become ((1Y) or (2X and 2Y)). If both Channels 1X and
1Y are faulted the relay logic becomes (2X and 2Y).
1 2 3 4 5
Relay Active True True True False False
Table 17-9) ‘For Any XY Pair (2oo2)’ scenarios
17-9) For Any XY Pair (2oo2 Enforced)
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