Westermo LR-11 - Manual (Page 12)

12 6608-2211
The receiver Rx2 on the rightmost LR-11 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-11 unit detects a break on Link 2, which results in an asser-
tion of CH2. The receiver Rx1 on the leftmost LR-11 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-11 unit does not function due to power loss or some internal error.
Receivers on the LR-11 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-11
CH1
CH2
LR-11
CH1
CH2
CH1
CH2
LR-11
CH1
CH2
LR-11
Ringmaster
Link 1
Link 2
LR-11
CH1
CH2
LR-11
CH1
CH2
LR-11
CH1
CH2
CH1
CH2
LR-11
Ringmaster
x
Link 1
Link 2
LR-11
CH1
CH2
LR-11
CH1
CH2
LR-11
CH1
CH2
CH1
CH2
LR-11
Ringmaster
x
x