Westermo ODW-730-F2 - Manual (Page 29)

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The fifth ODW-730 unit recieives data from communications device 5 on the RS-485
port and sends it out on optical fibre TX2 using the secondary data channel.
The fourth ODW-730 unit receives secondary channel data on optical fibre RX1.
Secondary channel data is repeated out on optical fibre TX2. The fourth ODW-730 unit
also receives data from communications device 4 on the RS-485 port. The RS-485 data is
sent out on optical fibre TX2 using the primary data channel.
The third ODW-730 unit receives both primary and secondary channel data on optical
fibre RX1. Both primary and secondary data are repeated out on optical fibre TX2. None
of the data is sent out on the RS-485 port.
The second ODW-730 unit receives both primary and secondary channel data on optical
fibre RX1. Both primary and secondary data are repeated out on optical fibre TX2, but
only the secondary channel data is sent out on the RS-485 port.
The first ODW-730 unit receives both primary and secondary channel data on optical
fibre RX1, but only the primary channel data is sent out on the RS-485 port.
Notice that the primary channel Ring Focal Point never repeats primary channel data
coming in from optical fibre RX2 and that the secondary channel Ring Focal Point never
repeats secondary channel data coming in from optical fibre RX2
RX2
TX2
Device 1
Receiving data from
device 4 on the
primary channel
Device 2
Receiving data from
device 5 on the
secondary channel
Device 3
Not sending or
receiving any data
Device 5
Sending data to
device 2 on the
secondary channel
TX1
RX1
RX2
TX2
TX1
RX1
RX2
TX2
RS-485 RS-485 RS-485
Fibre
pair
Fibre
pair
Fibre
pair
RS-485
TX1
RX1
RX2
TX2
TX1
RX1
Device 4
Sending data to
device 1 on the
primary channel
RS-485
Fibre
pair
RX2
TX2
TX1
RX1
PWR
FP
TD
RD
PWR
FP
TD
RD
PWR
FP
TD
RD
PWR
FP
TD
RD
PWR
FP
TD
RD
Primary channel
Focal point
Secondary channel
Focal point