BECKHOFF

BECKHOFF BK9103 PROFINET Bus Coupler

SKU BK9103

In stock
  • 12-month warranty
  • Free returns within 30 days

  • Manufacturer: BECKHOFF

  • Product No.: BK9103

  • Country of origin:Germany

  • Product Type: Bus Couplers

  • Payment: T/T, Western Union

  • Weight: 170g

  • Shipping port: Xiamen

  • Warranty: 12 months

Description

The BECKHOFF BK9103 is a PROFINET Bus Coupler designed to connect the Beckhoff Bus Terminal system to PROFINET RT (Class B) networks. As an interface between the higher-level fieldbus and the modular electronic terminal blocks, the BK9103 translates fieldbus telegrams into the internal K-bus signal format. This coupler handles data transmission, protocol handling, and power distribution for connected Bus Terminals within industrial automation architectures.

Equipped with a dual-channel switch featuring two RJ45 interfaces, the BK9103 supports line and star network topologies without requiring an external network switch. The unit powers the internal K-bus and supplies the power contacts, supporting up to 64 Bus Terminals directly or expanding up to 255 Bus Terminals using K-bus extension technology. Configuration of the connected I/O channels is supported via the KS2000 software tool.

Features

  • PROFINET RT (Class B) communication protocol support for real-time Ethernet data exchange
  • Integrated 2-channel switch with two RJ45 connectors for flexible line and star wiring topologies
  • Supports up to 64 Bus Terminals natively and up to 255 Bus Terminals with K-bus extension
  • Processes up to 512 bytes of input data and 512 bytes of output data over the fieldbus
  • Integrated power supply providing 1750 mA for K-bus communication
  • Automatic 10/100 Mbit/s transmission rate detection
  • Diagnostic indicators for operating state, network link, and bus errors

Applications

  • PROFINET-based modular machine building and discrete manufacturing systems
  • Distributed industrial I/O data acquisition and control architectures
  • Factory automation networks requiring line or star Ethernet topologies
  • Retrofitting and expanding existing K-bus terminal stations into PROFINET networks

Technical Specifications

General

Parameter Specification
Manufacturer BECKHOFF
Exact Model BK9103
Product Type PROFINET Bus Coupler
Number of Bus Terminals 64 (255 with K-bus extension)
Max. Fieldbus Data Size 512 byte input and 512 byte output
Digital Peripheral Signals 512 inputs / 512 outputs
Analog Peripheral Signals 256 inputs / 256 outputs
Configuration via KS2000

Communication and Interface

Parameter Specification
Protocol PROFINET RT (Class B)
Data Transfer Rates 10/100 Mbit/s, automatic recognition
Bus Interface 2 x RJ45 (2-channel switch)
Data Transfer Medium 4 x 2 twisted pair copper cable; category 3 (10 Mbit/s), category 5 (100 Mbit/s)
Topology Line or star wiring
Cascading Up to 20 BK9103 or max. line length 2 km
Distance Between Stations 100 m between hub/switch and bus coupler or between bus coupler and bus coupler

Electrical

Parameter Specification
Power Supply 24 V DC (-15 percent / +20 percent)
Input Current 70 mA + (total K-bus current) / 4, 500 mA max.
Starting Current 2.5 x continuous current
Recommended Fuse Less than or equal to 10 A
Current Supply K-bus 1750 mA
Power Contacts Max. 24 V DC / max. 10 A
Electrical Isolation 500 V (power contact / supply voltage / fieldbus)

Mechanical and Environmental

Parameter Specification
Weight Approx. 170 g
Operating Temperature -25 to +60 degC
Storage Temperature -40 to +85 degC
Relative Humidity 95 percent, 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
Protection Rating / Installation Position IP20 / variable

Compliance and Certifications

Parameter Specification
Approvals and Markings CE, UL, ATEX, IECEx, DNV GL
ATEX Marking II 3 G Ex ec IIC T4 Gc
IECEx Marking Ex ec IIC T4 Gc

Connections / Interfaces

Interface Function
RJ45 Port 1 PROFINET communication interface (Port 1 of internal switch)
RJ45 Port 2 PROFINET communication interface (Port 2 of internal switch)
Power Contacts (24 V DC) Field-side power supply for connected terminals (max. 10 A)
Bus Terminal K-bus Internal internal data bus connection to modular Bus Terminals

Installation Guidelines

  1. Ensure all power sources are switched off and isolated before performing any mechanical or electrical installation work.
  2. Verify that the mounting rail is securely fixed and grounded according to control cabinet specifications.
  3. Mount the BECKHOFF BK9103 bus coupler onto the DIN rail by snapping it into position alongside the target terminal assembly.
  4. Connect the 24 V DC power supply and ground conductors to the designated terminals, observing correct polarity and fuse ratings (≤ 10 A).
  5. Connect the PROFINET network cables to the RJ45 ports using category 5 cables for 100 Mbit/s operation.
  6. Attach downstream Bus Terminals via the internal K-bus connector, ensuring physical locking mechanisms are engaged.
  7. Verify network parameters, configuration settings, and potential distribution groups prior to system power-up.

FAQ

What is the primary function of the BECKHOFF BK9103?
The BECKHOFF BK9103 functions as a PROFINET Bus Coupler that connects modular Beckhoff Bus Terminals to a PROFINET RT network, translating fieldbus telegrams to the internal K-bus format.

How many Bus Terminals can be connected to the BECKHOFF BK9103?
The BECKHOFF BK9103 supports up to 64 Bus Terminals directly, and up to 255 Bus Terminals when utilizing K-bus extension technology.

What network interface does the BECKHOFF BK9103 use?
The BECKHOFF BK9103 features an integrated 2-channel switch with two RJ45 connectors, enabling 10/100 Mbit/s Ethernet data transfer rates in line or star topologies.

What power supply is required for the BECKHOFF BK9103?
The BECKHOFF BK9103 operates on a 24 V DC power supply (-15 percent / +20 percent) and provides an internal K-bus current supply of 1750 mA.

What hazardous area certifications apply to the BECKHOFF BK9103?
The BECKHOFF BK9103 carries ATEX (II 3 G Ex ec IIC T4 Gc) and IECEx (Ex ec IIC T4 Gc) certifications for use in explosive atmospheres.

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  • Standard Delivery: 4-6 Business Days via DHL, FedEx, and UPS.
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  • 12-Month Warranty: Every industrial component is backed by our professional technical warranty.

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TECHNICAL SPECIFICATIONS

Country of origin
Germany

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