Westermo ODW-641 - Manual (Page 20)

20 6650-2291
LED indication faulty condition
If one fiber in the optical fibre pair fails, all cummunication with will be lost and the FL R
LED’s will turn on. The ODW-641 that is still sensing optical power will indicate this by
flashing the CH1 LED.
If both fibers in the optical fibre pair fails, all cummunication with will be lost, the CH1
LED’s will turn off and the FL R LED’s will turn on.
ODW-641 ODW-641
FL L LED
is on CH 1 LED
is off
Faulty
fibre
TX1
RX1
RX1
TX1
PROFIBUS
Master
PROFIBUS
Slave
FL L LED
is on
CH 1 LED
is flashing
ODW-641 ODW-641
FL L LED
is on CH 1 LED
is off
Faulty
fibres
TX1
RX1
RX1
TX1
PROFIBUS
Master
PROFIBUS
Slave
FL L LED
is on
CH 1 LED
is flashing