BK1250 | Compact coupler between EtherCAT Terminals and Bus Terminals

The BK1250 is a Bus Coupler in a terminal housing for mixed use of EtherCAT Terminals and standard Bus Terminals in a bus station. Up to 64 Bus Terminals and one bus end terminal can be connected to a BK1250. The process image of the EtherCAT system is assigned automatically. Up to 255 Bus Terminals can be connected via the K-Bus extension.

Special features:

Compact design
mixed use of EtherCAT Terminals and Bus Terminals

The system and field supply, each 24 V DC, is provided directly at the BK1250. The attached Bus Terminals are supplied with the current required for communication from the supplied system voltage. The field supply is forwarded to the individual I/O components via the power contacts with up to 10 A. The Bus Terminals are parameterized via ADS through the KS2000 software. Alternatively, the controller (PLC, IPC) can configure the Bus Terminals via PLC function blocks.

Product status:

regular delivery

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Technical data
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Technical data	BK1250
Number of Bus Terminals	64 (255 with K-bus extension)
Max. number of bytes fieldbus	1024 byte input and 1024 byte output
Digital peripheral signals	8,192 inputs/outputs
Analog peripheral signals	256 inputs/outputs
Protocol	EtherCAT
Configuration possibility	via KS2000 or EtherCAT (ADS)
Data transfer rates	100 Mbit/s
Bus interface	via E-bus contacts
Power supply	24 V DC (-15 %/+20 %)
Input current	70 mA + (total K-bus current)/4, 200 mA max.
Starting current	approx. 2.5 x continuous current
Recommended fuse	≤ 10 A
Current supply K-bus	500 mA
Power contacts	max. 24 V DC/max. 10 A
Electrical isolation	500 V (power contact/supply voltage/Ethernet)
Weight	approx. 55 g
Operating/storage temperature	-25…+60 °C/-40…+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 IECEx: Ex ec IIC T4 Gc

Technical data
Housing data

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Housing data	KL-12-8pin
Design form	compact terminal housing with signal LEDs
Material	polycarbonate
Dimensions (W x H x D)	12 mm x 100 mm x 68 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
Connection cross-section AWG	s: AWG 28…14, st: AWG 28…14, f*: AWG 26…16
Stripping length	8…9 mm
Current load power contacts	I_max: 10 A

*s: solid wire; st: stranded wire; f: with ferrule

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BK1250 | Compact coupler between EtherCAT Terminals and Bus Terminals

Product information