Westermo ODW-631 User Manual download pdf (Page 11)

6650-2243

Point-to-point communication via fibre optical network

The serial data is transferred via a fibre optic network between two ODW-631s.

This application is useful e.g. for long distance communication, where electromagnetic

interference may occur or when isolation of the electrical network is needed. The maxi-

mum optical fibre distance between two units depends on selected fibre transceiver and

fibre type. Distance up to 80 km (50 miles) are available.

Note! The bi-di transceivers must always be used in pair, see example:

TX 1310 nm RX 1310 nm

RX 1550 nm TX 1550 nm

POWER CH 1

COM +VA +VB COM

POWER CH 1

COM +VA +VB COMTX RX TX RX

Fibre optical connection

at point-to-point communication

POWER CH 1

COM +VA +VB COM

POWER CH 1

COM +VA +VB COM

TX/

Fibre optical connection

at point-to-point communication (Bi-di transceiver)

Bi-di transceiver, TX 1310 nm,

RX 1550 nm.

Bi-di transceiver, TX 1550 nm,

RX 1310 nm.

Serial data transfer can be set in two modes:

Syncronous mode: Transfer special protocols such as Manchester coded protocol. …

See special switch settings on page 22.

Asyncronous mode: Data will be sent over the fibre optic network when a start-bit has …

been identified. The data rate and number of data bits should be set by DIP-switches.

The turning time (from sending serial RS-485 data until changing to receive mode) is

automatically calculated from the DIP-switch setting.

1 2 ... 6 7 8 9 10 11 12 13 14 15 16 ... 25 26

No comments

Westermo ODW-631 User Manual Page 11