Westermo ODW-720-F2 User Manual
Page 21
21
6651-2235
Data transport in redundant ring, dual channel, Y-mode configuration
RX2
TX2
TX1
RX1
RX2
TX2
TX1
RX1
RX2
TX2
Fibre
pair
Fibre
pair
Fibre
pair
TX1
RX1
RX2
TX2
TX1
RX1
Primary channel
Focal point
Scondary channel
Focal point
Device 1
Sending data to
device 3 on the
primary channel
RS-232
Device 2
Sending data to
device 4 on the
secondary channel
RS-232
Device 3
Receiving data from
device 1 on the
primary channel
RS-232
Device 4
Receiving data from
device 2 on the
secondary channel
RS-232
PWR
FP
TD
RD
PWR
FP
TD
RD
PWR
FP
TD
RD
PWR
FP
TD
RD
The first ODW-720 unit recieives data from communications device 1 on the RS-232
port and sends it out on optical fibre TX1 using the primary data channel.
The second ODW-720 unit receives primary channel data on optical fibre RX2. Primary
channel data is repeated out on optical fibre TX1. The second ODW-720 unit also
receives data from communications device 2 on the RS-232 port. The RS-232 data is sent
out on optical fibre TX1 using the secondary data channel.
The third ODW-720 unit receives both primary and secondary channel data on optical
fibre RX2. Both primary and secondary data are repeated out on optical fibre TX1, but
only the primary channel data is sent out on the RS-232 port.
The fourth ODW-720 unit receives both primary and secondary channel data on optical
fibre RX2. Both primary and secondary data are repeated out on optical fibre TX1, but
only the secondary channel data is sent out on the RS-232 port.