제품 세부 사항

Manufactured by BECKHOFF  

LIGHTBUS “ECONOMY PLUS“ BUS COUPLER FOR UP TO 64 BUS TERMINALS (255 WITH K-BUS EXTENSION)

Lightbus

BK20x0

 

Power LEDs

K-bus

Bus Coupler
supply

Input for
power contacts

Power contacts

Fieldbus signal input

Fieldbus signal output

Configuration interface

BK2000, BK2010, BK2020 | Lightbus Bus Couplers

BK2000, BK2010, BK2020 | Lightbus Bus Couplers

The BK2000, BK2010 and BK2020 Bus Couplers connect the Lightbus system to the electronic terminal blocks, which can be expanded in modular fashion. One unit consists of one Bus Coupler, any number of up to 64 terminals and one end terminal. The BK2010 economy variant permits particularly economical creation of peripheral interfacing connections. Up to 64 digital input/output terminals can be connected.

With the K-bus extension technology, the “Economy plus” Bus Coupler BK2020 allows the connection of up to 255 spatially distributed Bus Terminals to one Bus Coupler. The “Economy plus” series supports all Beckhoff system Bus Terminals. It can process in its full configuration 1,020 digital signals and a maximum of 128 analog input and output channels per slave.

The Bus Coupler recognises the connected terminals and automatically generates the affiliations of the inputs/outputs to the bytes of the process image. The first input/output signal is inserted in the first bit of one byte (LSB), beginning from the left. The Bus Coupler inserts further signals in this byte. Inputs and outputs are clearly separated. The Bus Coupler automatically begins a further byte if the number of inputs or outputs exceeds 8 bits.

The Lightbus System is a rapid and safe serial fieldbus system. The Lightbus has a ring structure; up to 254 stations can be operated in a ring. Easy-to-operate standard fibre optic technology is used for data transmission, which represents excellent value. Thanks to an optimised, efficient telegram structure, the Lightbus achieves a very high user data transmission rate. For the exchange of 32 bit information 25 µs transmission time is required.

Thanks to the high-speed access method employed by the Lightbus, it is possible to access specific peripheral data and to read or write the required data only. Data is exchanged with the required priorities without producing any overhead.

System data	Lightbus | BK2000, BK2010, BK2020
Number of I/O stations	254
Number of I/O points	16,192
Data transfer medium	fibre optic conductor: APF (plastic) fibre (1,000 µm) or HCS fibre (200 µm)
Distance between stations	45 m for APF fibre, 300 m HCS fibre
Data transfer rates	2.5 Mbaud
Data transfer time	0.26 ms in the case of 10 modules for 32 bit inputs and outputs each (without K-bus run-time)