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BK2000 – Beckhoff

BK2000 – Beckhoff

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Lightbus Bus Coupler Electronic Terminal Block “Beckhof”

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 Bus Coupler recognizes 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 fiber optic technology is used for data transmission, which represents excellent value. Thanks to an optimized, 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.

Number of I/O stations 254
Number of I/O points 16,192
Data transfer medium fiber-optic conductor: APF (plastic) fiber (1,000 µm) or HCS fiber (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)
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Technical data BK2000
Number of Bus Terminals 64
Max. number of bytes fieldbus 512 byte input and 512 byte output
Digital peripheral signals 512 inputs/outputs
Analog peripheral signals 128 inputs/outputs
Configuration possibility via KS2000 or the controller
Bus interface 2 x standard fiber-optic connector Z1000 (plastic fiber), Z1010 (HCS fiber)
Power supply 24 V DC (-15 %/+20 %)
Input current 70 mA + (total K-bus current)/4, 500 mA max.
Starting current approx. 2.5 x continuous current
Recommended fuse = 10 A
Current supply K-bus 1750 mA
Power contacts max. 24 V DC/max. 10 A
Electrical isolation 500 V (power contact/supply voltage)
Distance between stations 45 m for APF fibre, 300 m HCS fibre
Weight approx. 150 g
Operating/storage temperature 0…+55 °C/-25…+85 °C
Relative humidity 95 %, no condensation
Vibration/shock resistance conforms to EN 60068-2-6/EN 60068-2-27
EMC immunity/emission conforms to EN 61000-6-2/EN 61000-6-4
Protect. rating/installation pos. IP20/variable
Approvals/markings CE, UL, ATEX, IECEx
Ex marking ATEX:
II 3 G Ex nA IIC T4 Gc
Ex ec IIC T4 Gc
Housing data
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Housing data BKxxxx, BCxxxx
Design form compact terminal housing with signal LEDs
Material polycarbonate
Dimensions (W x H x D) 51 mm x 100 mm x 69 mm
Installation on 35 mm DIN rail, conforming to EN 60715 with lock
Side by side mounting by means of double slot and key connection
Marking labeling of the BZxxx series
Wiring solid conductor (e), flexible conductor (f) and ferrule (a): spring actuation by screwdriver
Connection cross-section s*: 0.08…2.5 mm²,
st*: 0.08…2.5 mm²,
f*: 0.14…1.5 mm²
Stripping length 8…9 mm
Current load power contacts Imax: 10 A
*s: solid wire; st: stranded wire; f: with ferrule
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