Ethernet TCP/IP Bus Coupler BK9000
Power LEDs
Bus Coupler
Input for
power contacts
Power contacts
Ethernet RJ 45
Address selector
Configuration interface
extended temperature range

BK9000 | Ethernet TCP/IP Bus Coupler

Ethernet TCP/IPThe BK9000 Bus Coupler connects Ethernet with the modular, extendable electronic terminal blocks. One unit consists of one Bus Coupler, any number from 1 to 64 terminals and one end terminal.

The Bus Coupler recognises the terminals to which they are connected, and performs the assignment of the inputs and outputs to the words of the process image automatically. The BK9000 supports 10 Mbit/s and 100 Mbit/s Ethernet. Connection is through normal RJ45 connectors. The IP address is set on the DIP switch (offset to a freely selectable start address). In networks with DHCP (a service for the allocation of the logical IP address to the physical node address [MAC-ID]) the Bus Coupler obtains its IP address from the DHCP server.

The Bus Coupler supports ADS TwinCAT system communication. TwinCAT I/O makes available configuration tools and Windows NT/2000/XP drivers for programs in any desired high-level language (DLLs) and for Visual Basic applications (ActiveX). Applications with OPC interfaces can access ADS (and therefore the BK9000) via an OPC server. In addition to ADS the Bus Coupler supports Open Modbus (Modbus TCP), a simple, widespread master/slave protocol based on TCP/IP.

System data Ethernet TCP/IP | BK9000
Number of I/O stations only limited by IP addresses
Number of I/O points depending on controller
Data transfer medium 4 x 2 twisted pair copper cable; category 3 (10 Mbaud), category 5 (100 Mbaud)
Distance between stations 100 m between hub/switch and Bus Coupler
Data transfer rates 10/100 Mbaud
Topology star wiring
Technical data BK9000
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
Protocol TwinCAT ADS, Modbus TCP, Beckhoff real-time Ethernet
Configuration possibility via KS2000
Data transfer rates 10/100 Mbaud, automatic recognition of the transmission rate
Bus interface 1 x RJ45
Power supply 24 V DC (-15 %/+20 %)
Input current 70 mA + (total K-bus current)/4, 500 mA max.
Starting current 2.5 x continuous current
Recommended fuse ≤ 10 A
Current supply K-bus 1750 mA
Power contacts 24 V DC max./10 A max.
Electrical isolation 500 V (power contact/supply voltage/fieldbus)
Weight approx. 170 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. class/installation pos. IP 20/variable
Approvals CE, UL, Ex, GL
KS2000 configuration software for extended parameterisation
Cordsets cordsets and connectors
FC9001-0010 | FC9011 Ethernet PCI fieldbus cards
Related products  
BK9050 Ethernet TCP/IP “Compact” Bus Coupler for up to 64 Bus Terminals (255 with K-bus extension)
BK9100 Ethernet TCP/IP Bus Coupler for up to 64 Bus Terminals (255 with K-bus extension), with integrated 2-channel switch
BC9000 Ethernet Bus Terminal Controller for up to 64 Bus Terminals
BC9050 Ethernet “Compact“ Bus Terminal Controller for up to 64 Bus Terminals (255 with K-bus extension)
CX8090 Ethernet Embedded PC
Ethernet TCP/IP For further Ethernet TCP/IP products please see the system overview