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Bus Terminals
Bus Terminals
Bus Terminals

The Beckhoff Bus Terminal system, consisting of electronic terminal blocks, is a fundamental component for automation technology. The open, fieldbus-neutral I/O system is connected to more than 30 fieldbus and Industrial Ethernet systems, such as PROFIBUS, PROFINET, CANopen or BACnet, using Bus Couplers or master terminals.
With a wide range of I/O components for connecting all commercially available sensors and actuators, Beckhoff covers the communication routes between the control system and the field level, thus completing its universal control and drive solution. The focus here is on the simple integration of the open control technology. The product portfolio includes more than 1,000 Bus Terminals for over 100 different signal types.
The Beckhoff Bus Terminals are used in various industrial sectors – from machine construction to building control systems – and have successfully proven themselves due to the simple system planning, wiring, commissioning and maintenance.



Product Details
Technical Parameters




BKxxxx | Bus Coupler
Bus Couplers are the link between the modularly extendable Bus Terminals and the corresponding fieldbus systems.


BCxxxx, BXxxxx | Controller
The Bus Terminal Controllers BC and BX can be used as an autonomous control system or as intelligent fieldbus slaves.



KL1xxx | Digital input
The KL1xxx Bus Terminals enable the acquisition of binary signals from the process level.



KL2xxx | Digital output
The KL2xxx Bus Terminals generate binary signals and forward them to the process level.







KL2xxx | Compact drive technology
The KL2xxx Bus Terminals provide compact drive solutions for stepper and DC motors as well as for AC motor speed controllers.


KL3xxx | Analog input
The KL3xxx Bus Terminals process analog input signals for voltage, current, temperature and other measured variables.

KL4xxx | Analog output
The KL4xxx Bus Terminals output analog signals with the levels 0…10 V, ±10 V, 0…20 mA and 4…20 mA.

KL5xxx | Position measurement
The KL5xxx Bus Terminals are intended for the evaluation of complex signals from absolute and incremental encoders.






KL6xxx | Communication
With the KL6xxx Bus Terminals, Bus Terminal stations become a universal gateway between different systems.


KL85xx | Manual operating
The KL85xx manual operating modules enable switching, controlling and monitoring of signals without opening the control cabinet.

KL9xxx | System
The KL9xxx Bus Terminals complete the I/O system with functions such as power supply, fusing and filtering.

KLx9xx | TwinSAFE
The safe I/Os and the TwinSAFE Logic Terminal can be integrated in any fieldbus system.





KLxxxx | Special Terminals
The KLxxxx Bus Terminal portfolio includes selected coupler and terminal types with a software or hardware modification.






application parameters

The Beckhoff Bus Terminals form an open and fieldbus-neutral I/O system consisting of electronic terminal blocks. The connection between the Bus Terminals and the fieldbus is provided by Bus Couplers, which are available for PROFIBUS, CANopen, DeviceNet, and many other common fieldbus systems.

Besides standard I/O signals, the product portfolio also includes safety I/Os for the combined use of safety functions and I/O technology in one system. Furthermore, Bus Terminals are also available for special tasks in building automation or for implementing drive solutions.

All components can be simply plugged onto the DIN rail in the control cabinet or terminal box. Power supply, communication and field voltage distribution are automatically provided via internal terminal contacts when they click into place.


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