EtherCAT Bus Coupler BK1120
Power LEDs
K-bus
(Bus Terminal)
Bus Coupler
supply
Input for
power contacts
Power contacts
Signal input EtherCAT
Link/Act In
Configuration and
programming interface
Signal output EtherCAT
Link/Act Out
extended temperature range
extended shock and vibration range

BK1120 | EtherCAT Bus Coupler

EtherCATThe BK1120 Bus Coupler connects EtherCAT, the real-time Ethernet system, with the modular, extendable electronic terminal blocks. A unit consists of a Bus Coupler, any number (between 1 and 64) of terminals (255 with K-bus extension) and one end terminal.

The Bus Coupler recognises the connected Bus Terminals and automatically allocates them into the EtherCAT process image. The Bus Coupler is connected to the network via the upper Ethernet interface. The lower RJ45 socket may be used to connect further EtherCAT devices in the same strand.

In the EtherCAT network, the BK1120 Bus Coupler can be installed anywhere in the Ethernet signal transfer section (100BASE-TX) – except directly at the switch. The Bus Coupler BK9000 (for K-bus components) is suitable for installation at the switch.

EtherCAT (Ethernet Control Automation Technology) is the Ethernet solution for industrial automation, characterised by outstanding performance and particularly simple handling. EtherCAT enables the Ethernet star topology to be replaced with a simple line structure. Optionally, EtherCAT may also be wired in the “classic” way using switches, in order to integrate further Ethernet devices. The master requires no special plug-in card and can be implemented on any existing Ethernet controller using a very simple interface. EtherCAT is therefore also well suited to small and medium control applications, where it will also open up new areas of application for distributed I/Os.

For EtherCAT a separate I/O system in protection class IP 20 is available in the form of EtherCAT Terminals. In contrast to Bus Terminals, where the fieldbus signal is implemented within the Bus Coupler on the internal, fieldbus-independent terminal bus, the EtherCAT protocol remains fully intact down to the individual terminal. The ELxxxx EtherCAT Terminals are connected via associated EKxxxx-type EtherCAT Couplers (see EtherCAT section).

System data EtherCAT | BK1120
Number of I/O stations 65,535
Number of I/O points depending on controller
Data transfer medium Ethernet/EtherCAT Cat.5 cable
Max. cable length 100 m (100BASE-TX)
Data transfer rates 100 Mbaud
Data transfer time 0.01 ms in the case of 10 modules for 32 bit inputs and outputs each (without K-bus run-time)
Technical data BK1120
Number of Bus Terminals 64 (255 with K-bus extension)
Max. number of bytes fieldbus 1024 byte input and 1024 byte output
Configuration possibility via KS2000 or EtherCAT (ADS)
Bus interface 2 x RJ45
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 24 V DC max./10 A max.
Electrical isolation 500 V (power contact/supply voltage/Ethernet)
Distance between stations 100 m (100BASE-TX)
Weight approx. 150 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
Accessories  
KS2000 configuration software for extended parameterisation
Cordsets cordsets and connectors
FC9001-0010 | FC9011 Ethernet PCI fieldbus cards
Related products  
BK1150 EtherCAT “Compact” Bus Coupler for up to 64 Bus Terminals (255 with K-bus extension)
BK1250 EtherCAT “Compact“ Coupler between EtherCAT Terminals (E-bus) and Bus Terminals (K-bus), adapter terminal
CX8010 EtherCAT Embedded PC
System  
EtherCAT For further EtherCAT products please see the system overview