Westermo ODW-622 - Manual (Page 11)

11 6650-2234
Multidrop via fibre optical network
The data is transferred via the fibre optic network to the serial ports of all units. If
ODW-622 is connected to two optical fibre links (mid unit) converted data will be trans-
mitted in both directions, via both CH 1 and CH 2. With only one optical fibre link (end
unit) converted data will be transmitted in one direction, via CH 1 only. Data received
from one ODW-622 optical fibre port will be repeated through the other optical fibre
port and it will also convert the frame to serial data.
TX RX TX RX TX RX TX RX TX RX TX RX TX RX TX RX
CH 2 CH 1 CH 2 CH 1
Master, unit
M
Slave, unit
S
CH 2 CH 1 CH 2 CH 1
PLC PLC