Sídlo Česká republika
Beckhoff Automation s.r.o.

Sochorova 23
61600 Brno, Česká republika

+420 511 189-250

Bus Terminals


BKxxxx | Bus Coupler

The Bus Couplers are the link between modularly extendable Bus Terminals and the respective 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 are used to acquire 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 signals to be switched, controlled and monitored without having to open the control cabinet.

KL8xxx | Power

Together with a power contactor, the KL8001 power terminal forms a complete distributed motor starter.

KL9xxx | System

The KL9xxx Bus Terminals round off the application of the I/O system with functions such as power supply, fusing and filters.

KLx9xx | TwinSAFE

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

KLxxxx | Special Terminals

Specific coupler and terminal types with modified software or hardware.

The basic function block for automation

The Beckhoff Bus Terminal system, consisting of electronic terminal blocks, forms the basic function block for the automation technology. Bus Couplers or master terminals are used to connect the open, fieldbus-neutral I/O system to more than 30 fieldbus and Industrial Ethernet systems, such as PROFIBUS, PROFINET, CANopen and BACNet.

With a wide range of I/O components for connecting all commercially available sensors and actuators, Beckhoff covers the communication routes between control system and field level, thus completing its universal control and drive solution. At the core is 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 a wide range of industrial sectors, from machine construction to building management, and have successfully proven themselves due to their simple design, wiring, commissioning and maintenance.

Advantages at a glance

Senior product manager Michael Jost presents 25 years of Bus Terminals, a revolutionary idea became a fundamental element of automation.
Senior product manager Michael Jost presents 25 years of Bus Terminals, a revolutionary idea became a fundamental element of automation.

The Beckhoff Bus Terminals form an open and fieldbus-neutral I/O system consisting of electronic terminal blocks. Bus Couplers are used as a link between the I/O components and the fieldbus. The product portfolio includes Bus Couplers for PROFIBUS, CANopen, DeviceNet, and many other common fieldbus systems.

Besides standard I/O signals, the product portfolio also includes safety I/Os for connecting safety functions and I/O technology in one system. This allows Bus Terminals to be used, for example, for special tasks in building automation or for implementing drive solutions.

All components can be easily fitted in the control cabinet or terminal box on the DIN rail; power supply, communication and field voltage distribution are automatically provided via internal terminal contacts when they click into place.

The fine granularity of the Bus Terminals enables bit-precise composition of the required I/O channels. The digital Bus Terminals for the generation and processing of binary signals are executed as 2, 4, 8 and 16-channel terminals or with up to 64 channels as terminal modules. In the 16-channel version, digital input and output signals are compressed into a standard terminal housing with a width of just 12 mm.

The analog inputs for processing analog signals from the field can process a wide range of measured variables. These include, for example, current, voltage, temperature and resistance. In addition to the signal type, the terminals also differ with regard to signal resolution and measurement uncertainty. In the analog output area, the standard signals of ± 10 V, 0…10 V, 0…20 mA and 4…20 mA are consistently available as a 1, 2, 4 or 8-channel version in a standard housing.

The Bus Terminals also offer comprehensive solutions for drive control, the evaluation of various encoder interfaces and for special measurement applications, such as power measurement..

The Bus Terminals create a fieldbus-neutral I/O system. The Bus Couplers act as an interface between fieldbus and Bus Terminals. Bus Couplers are available for the following bus systems:

  • EtherCAT, the high-speed, real-time Ethernet fieldbus
  • Lightbus, the fast fiber-optic fieldbus
  • PROFIBUS DP/FMS according to the European standard EN 50170
  • Interbus, which has been on the market since 1987
  • CANopen, for multiple masters in the actuator/sensor area
  • DeviceNet, the device bus with CAN technology
  • Modbus, the open fieldbus
  • CC Link, the fieldbus for the Asian market
  • SERCOS interface, the drive technology bus
  • RS232/RS485, the network for the most economical solution
  • Ethernet TCP/IP, the network bus
  • Ethernet/IP, the Industrial Ethernet solution from ODVA
  • PROFINET, the Industrial Ethernet solution from PNO

With the master terminals, fieldbus functionalities are available in form of a standard Bus Terminal. This is particularly advantageous for bus systems that are integrated as subsystems into a higher-level system. It means that only one system is required for the subsystem and for the higher-level bus interface. Master terminals are available for the following bus systems:

  • AS-Interface, the sensor/actuator bus for the lower control level
  • IO-Link, the interface for intelligent sensors and actuators
  • KNX/EIB, LON, DALI, MP-Bus, M-Bus, SMI, EnOcean: the communication standards in building automation

The Bus Terminal system offers different connection options for optimum adaptation to the respective application. The KLxxxx Bus Terminals include electronics and connection level in a single housing. In contrast, the Bus Terminals of the type KSxxxx feature a pluggable connection level, so that in case of service the entire wiring can be removed from the top side of the housing as one connector.

With the help of the Beckhoff Bus Terminals, control cabinets and terminal boxes can be built more economically. The outside contour of the Bus Terminals fits the dimensions of terminal boxes with technical perfection. The contacts are made as the terminal clicks into place, without any other manipulation. Each terminal remains individually exchangeable and can be mounted on a standard mounting rail. A clear front connection panel with status display as well as the insertable contact labeling ensure clarity on site. The 3/4-wire connection technology enables sensors and actuators to be directly connected.