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Beckhoff Lightbus

The fast fibre optic fieldbus

Simple, low-cost installations Light up the dark with the Beckhoff Lightbus system by replacing complete cable routes with one single fibre optic conductor. Instead of extensive I/O interfacing units, only one intelligent Beckhoff Lightbus interface board is integrated in the control computer and the decentralised Lightbus modules are directly situated locally. Installation effort and costs are reduced drastically, handling and maintenance are simplified, and interference immunity and performance are increased. The Lightbus was introduced as far back as 1989 as the Beckhoff system bus for fast machine controllers and has become the market leader in some sectors. These include, for instance, production machines for windows, wood processing machines, presses, packaging machines, machine tools, and applications in metrology and technical building services.

Fast and fail-safe industrial communiation
The Beckhoff Lightbus system is a fast and fail-safe serial fieldbus system that was conceived for the needs of automation technology. Low-cost and easy-to-process standard fibre optic conductor technology is used for transmission. The crucial advantages of the fibre optic conductor are interference immunity to electromagnetic influences, complete electrical isolation of connected modules from one another and a high data transfer rate. In conjunction with an optimised, compact telegram structure, the Lightbus permits a very high user information data transfer rate of up to 2.5 Mbits/s.

With one Lightbus interface board, up to 255 decentralised modules can be operated with a maximum distance of up to 300 m between two modules.

Reliability and flexibility
Reliability is a must – with efficient test and diagnostic functions, functioning of the individual Lightbus modules and communication in the entire Lightbus ring are monitored cyclically and automatically.

Changes or additions to a system configuration can be realised easily and reliably by means of configuration programs in the Lightbus system.

The Lightbus system is open and universally applicable. Lightbus interfaces are available for common bus and computer architectures, from the standard PC up to VME computers, and for control systems in use around the world.

The wide range of distributed Lightbus components covers the requirements found in automation technology for items from displacement sensors, through universal Bus Terminals up to drive controllers.


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Beckhoff Automation (Pty) Ltd

Beckhoff Lightbus