Product Description The BK2000 and BK2010 bus couplers connect the Beckhoff

I/O-Modules
Fieldbus Terminals
Lightbus - Coupler

Product Description

The BK2000 and BK2010 bus couplers connect the TRS-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.

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 output are clearly separated. The bus coupler automatically begins a further byte if the number of inputs or outputs exceeds 8 bits.

The TRS-Lightbus System is a rapid and safe serial field bus system. The TRS-Lightbus has a ring structure, and up to 254 stations can be operated in a ring. Easy-to-operate standard fiber-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 user information 25 m s transmission time is required.

Order number	Description
BK2000	TRS Lightbus coupler for up to 64 bus terminals
BK2010	TRS Lightbus coupler for up to 64 digital bus terminals
BK2500	TRS Lightbus coupler with RS485 port instead of fiber optic interface
KL9010	End terminal
KS2000	Connecting cable, configuration software on CD for Windows 95/NT

Complex signal processing for analog I/Os, position measurement

The BK2000 bus coupler supports the operation of all bus terminals. As far as the user is concerned, handling of the analog inputs/outputs is no different to other series. The information is available in the process image of the controller for processing in the form of an byte-array.

The analog and multifunctional bus terminals can be adapted to each specific application using the KS2000 configuration set. Depending on the type, the analog bus terminals' registers contain temperature ranges, gain values and linearisation characteristics. Using the KS2000 software, the required parameters can be set on a PC. The bus terminal stores settings permanently and in a fail safe manner.

Optionally, the bus terminals can also be controlled by the control system. Via function blocks (FBs), the Programmable Logic Controller (PLC) or the Industrial Personal Computer (IPC) handles configuration of the complete periphery during the start up phase. If required, the controller can upload the decentrally created configuration data in order to centrally manage and store this data. Therefore, new adjustments are not necessary in the event of replacement of a bus terminal. The controller automatically sets the required setting on power up.

Thanks to the high-speed access method employed by the TRS 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	TRS-Lightbus (BK2000, BK2010)
Number of I/O modules	254
Number of I/O points	16192
Data transfer medium	Fiber optic conductor: APF (plastic)- fiber (1000 µm) or PCS- fiber (200 µm)
Length between modules	45 m APF- fiber, 600 m PCS- fiber
Data transfer rate	2.5 Mbaud
Data transfer time	0.26 ms in the case of 10 modules with 32-bit inputs and outputs each

Technical data	BK2000	BK2010
Number of bus terminals	64
Digital peripheral signals	256 inputs/outputs	256 inputs/outputs
Analog peripheral signals	128 inputs/outputs	---
Configuration possibility	by KS2000 or the controller
Maximum number of bytes	512 bytes I and 512 bytes O	32 bytes (I and O)
Bus connection	2 x standard fiber optic connector Z1000 (plastic- fiber), Z1010 (PCS fiber)
Power supply	24 V DC (20...29 V DC)
Input current	70 mA + (total K-Bus current)/4
	500 mA max.	200 mA max.
Starting current	2.5 x continuous current
Recommended fuse	£ 10 A
K-Bus power supply up to	1750 mA 500 mA
Power contact voltage	24 V DC max.
Power contact current load	10 A max.
Dielectric strength	500 Vrms (Power contact / bus coupler supply voltage)
Weight approx.	150 g	130 g
Operating temperature	0°C ... +55°C
Storage temperature	-25°C ... +85°C
Relative humidity	95%, no condensation
Vibrations/shock resistance	conforms to IEC 68-2-6 / IEC 68-2-27
EMC resistance Burst / ESD	conforms to EN 50082 (ESD, Burst) / EN 50081
Installation position	any
Type of protection	IP20

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