Westermo LR-01 - Manual (Page 13)

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The receiver Rx2 on the rightmost LR-01 unit detects a break on Link 2.
Alarm CH2 is asserted on both local unit and the ring master unit.
The receiver Rx2 on the rightmost LR-01 unit detects a break on Link 2, which results in an asser-
tion of CH2. The receiver Rx1 on the leftmost LR-01 unit detects a break on Link 1,
which results in an assertion of CH1. The ring master asserts both CH1 and CH2.
The rightmost LR-01 unit does not function due to power loss or some internal error.
Receivers on the LR-01 units one step downstream the broken unit will detect a fault on the fibre links.
They will both assert their corresponding alarm output. The ring master asserts both CH1 and CH2.
Link 1
Link 2
LR-01
CH1
CH2
LR-01
CH1
CH2
CH1
CH2
LR-01
CH1
CH2
LR-01
Ringmaster
Link 1
Link 2
LR-01
CH1
CH2
LR-01
CH1
CH2
LR-01
CH1
CH2
CH1
CH2
LR-01
Ringmaster
x
Link 1
Link 2
LR-01
CH1
CH2
LR-01
CH1
CH2
LR-01
CH1
CH2
CH1
CH2
LR-01
Ringmaster
x
x