Westermo ODW-730-F2 User Manual download pdf (Page 20)

6651-2255

If an optical fibre segment fails, the ODW-730 Ring Focal Point will switch mode and

start sending out data on both optical fibre ports, TX1 and TX2, simultaneously.

RX2

TX2

Device 1

Sending

Device 2

Receiving

Device 3

Reciving

Device n

Receiving

TX1

RX1

RX2

TX2

TX1

RX1

RX2

TX2

RS-485 RS-485 RS-485

Fibre

pair

Faulty

segment

Fibre

pair

Focal point

RS-485

TX1

RX1

RX2

TX2

TX1

RX1

PWR

ODW-730 units located to the “right” side of the failure will send data in the opposite

direction as before. Notice that still, it’s only the first ODW-730 that is able to commu-

nicate in full duplex with other units, and that other units are incable of communicating

with each other.

RX2

TX2

Device 1

Receiving

Device 2

Not sending or

receiving any data

Device 3

Sending

Device n

Not sending or

receiving any data

TX1

RX1

RX2

TX2

TX1

RX1

RX2

TX2

RS-485 RS-485 RS-485

Fibre

pair

Faulty

segment

Fibre

pair

Focal point

RS-485

TX1

RX1

RX2

TX2

TX1

RX1

PWR

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Westermo ODW-730-F2 User Manual Page 20

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