BECKHOFF

BECKHOFF BK9000 Ethernet TCP/IP Bus Coupler

SKU BK9000

In stock
  • 12-month warranty
  • Free returns within 30 days
  • Manufacturer: BECKHOFF
  • Product No.: BK9000
  • Origin Germany
  • Product Type: Ethernet Bus Couplers
  • Payment: T/T, Western Union
  • Weight: 0.17 kg
  • Shipping port: Xiamen
  • Warranty: 12 months

Tags

Quantity

Product Description

Description

The BECKHOFF BK9000 is an Ethernet TCP/IP Bus Coupler designed to link physical Beckhoff Bus Terminals (K-bus system) to industrial Ethernet networks. Operating as an I/O device, the coupler manages communication between the master controller and modular digital or analog peripheral terminals, converting the fieldbus signals into the internal, terminal-independent K-bus representation.

This coupler supports automatic transmission rate recognition of 10/100 Mbit/s, facilitating simple integration into existing network topologies. System configuration and parameterization are managed via the Beckhoff KS2000 configuration software, which can connect through the Ethernet port or the integrated serial interface. The unit features an integrated power supply designed to power both the coupler electronics and the connected K-bus terminals.

Designed for compact control cabinet mounting, the BECKHOFF BK9000 provides direct connection for up to 64 Bus Terminals, and can be extended further using K-bus extension terminals. It features standard RJ45 networking hardware, mechanical rail mounting, and status LEDs for network diagnostics, power status, and terminal bus integrity.

Features

  • Ethernet TCP/IP physical interface with standard RJ45 connection.
  • Supports TwinCAT ADS, Modbus TCP, and Beckhoff Real-Time Ethernet protocols.
  • Automatic baud rate detection for 10 Mbit/s and 100 Mbit/s transmission.
  • Direct connection of up to 64 Bus Terminals, expandable up to 255 terminals.
  • Internal power supply unit generating up to 1750 mA K-bus current.
  • Configuration and diagnostics supported via KS2000 software interface.

Applications

  • Decentralized industrial Ethernet network topologies.
  • Modular digital and analog I/O signal acquisition in factory automation.
  • Modbus TCP-based machine monitoring and control systems.
  • Control cabinet installations requiring isolated potential distribution.

Technical Specifications

Parameter Specification
Manufacturer BECKHOFF
Model BK9000
Product Type Ethernet TCP/IP Bus Coupler
Number of Bus Terminals 64 (up to 255 with K-bus extension)
Max. Fieldbus I/O Capacity 512 bytes input / 512 bytes output
Configuration Interface KS2000 configuration software
Supported Protocols TwinCAT ADS, Modbus TCP, Beckhoff Real-Time Ethernet
Data Transfer Rates 10/100 Mbit/s, automatic recognition
Bus Connection Interface 1 x RJ45
Transmission Medium Category 3 (10 Mbit/s) or Category 5 (100 Mbit/s) UTP/STP copper cable
Power Supply Input Voltage 24 V DC (-15% / +20%)
Input Current 70 mA + (total K-bus current)/4, maximum 500 mA
Starting Current 2.5 times continuous current
Recommended Protective Fuse Less than or equal to 10 A
Current Supply K-Bus 1750 mA
Power Contacts Rating 24 V DC / maximum 10 A
Electrical Isolation 500 V (power contact / supply voltage / fieldbus)
Operating Temperature -25 to +60 Celsius
Storage Temperature -40 to +85 Celsius
Relative Humidity 95%, non-condensing
Protection Rating IP20
Weight Approximately 170 g

Connections / Interfaces

Interface / Terminal Function
RJ45 Socket 10/100 Mbit/s Ethernet network connection
PE Contact Functional earth connection point
Power Supply Terminals 24 V DC system supply input
Power Contacts Blade terminal feed for field-side potential distribution
K-Bus Interface Internal connection contacts to adjacent Bus Terminals

Installation Guidelines

  1. Verify that the incoming power supply matches the nominal 24 V DC specification of the BECKHOFF BK9000.
  2. Ensure the system is completely de-energized before mounting, wiring, or configuring terminal connections.
  3. Mount the coupler vertically onto a standard 35 mm DIN rail (EN 60715) inside a clean, dry, IP20-rated enclosure.
  4. Slide adjacent Bus Terminals onto the rail and align them with the coupler, ensuring the K-bus locking mechanisms click into engagement.
  5. Connect the network cable to the RJ45 port using appropriate Category 5 cabling for 100 Mbit/s operation.
  6. Wire the 24 V DC power supply to the designated terminals, checking polarity and functional earth grounding.
  7. Energize the system and verify unit status using the diagnostic LEDs before commissioning the fieldbus interface.

Replacement Recommendations

When replacing a BECKHOFF BK9000 coupler, document the existing terminal ordering layout and note the exact configuration parameters, IP address settings, or subnet masks stored in the system. Ensure all power supplies are isolated before sliding terminals away from the old coupler. Set the same hardware configurations, node addresses, or software-defined parameters on the replacement unit before powering the K-bus assembly.

Compliance and Certifications

  • CE, UL, DNV GL
  • ATEX: II 3 G Ex ec IIC T4 Gc
  • IECEx: Ex ec IIC T4 Gc
Shipping & Returns

Global Express Shipping

  • Standard Delivery: 4–6 business days via DHL, FedEx, and UPS.
  • Express Dispatch: Same-day dispatch for in-stock orders placed before 2:00 PM (GMT+8).
  • Worldwide Coverage: Serving over 150 countries.

Returns & Warranty

  • 30-Day Guarantee: Returns accepted for in-stock products in original, factory-sealed packaging.
  • 12-Month Warranty: Every industrial component is backed by our technical warranty.
FAQ
What protocols does the BECKHOFF BK9000 bus coupler support?
The BECKHOFF BK9000 supports TwinCAT ADS, Modbus TCP, and Beckhoff Real-Time Ethernet protocols over TCP/IP network infrastructures.
How many Bus Terminals can be connected directly to the BECKHOFF BK9000?
The BECKHOFF BK9000 can connect up to 64 Bus Terminals directly on a single K-bus node. This capacity can be extended up to 255 terminals using a K-bus extension terminal.
What are the power requirements of the BECKHOFF BK9000?
The BECKHOFF BK9000 requires a 24 V DC supply (-15% / +20%) and provides a continuous current of 1750 mA to the integrated K-bus.
How do I configure the network settings on a BECKHOFF BK9000?
The BECKHOFF BK9000 can be configured through the Beckhoff KS2000 configuration software interface using either the standard Ethernet connection or the unit's serial interface.
Reviews

BK9000

Stock & lead time on request

Call
1 of 1

BECKHOFF BK9000 Ethernet TCP/IP Bus Coupler

Only 10 item(s) left in stock
  • Manufacturer: BECKHOFF

  • Product No.: BK9000

  • Country of origin:Germany

  • Product Type: Ethernet Bus Couplers

  • Payment: T/T, Western Union

  • Weight: 170g

  • Shipping port: Xiamen

  • Warranty: 12 months

Quantity
View full details

Product Description

Description

The BECKHOFF BK9000 is an Ethernet TCP/IP Bus Coupler designed to link physical Beckhoff Bus Terminals (K-bus system) to industrial Ethernet networks. Operating as an I/O device, the coupler manages communication between the master controller and modular digital or analog peripheral terminals, converting the fieldbus signals into the internal, terminal-independent K-bus representation.

This coupler supports automatic transmission rate recognition of 10/100 Mbit/s, facilitating simple integration into existing network topologies. System configuration and parameterization are managed via the Beckhoff KS2000 configuration software, which can connect through the Ethernet port or the integrated serial interface. The unit features an integrated power supply designed to power both the coupler electronics and the connected K-bus terminals.

Designed for compact control cabinet mounting, the BECKHOFF BK9000 provides direct connection for up to 64 Bus Terminals, and can be extended further using K-bus extension terminals. It features standard RJ45 networking hardware, mechanical rail mounting, and status LEDs for network diagnostics, power status, and terminal bus integrity.

Features

  • Ethernet TCP/IP physical interface with standard RJ45 connection.
  • Supports TwinCAT ADS, Modbus TCP, and Beckhoff Real-Time Ethernet protocols.
  • Automatic baud rate detection for 10 Mbit/s and 100 Mbit/s transmission.
  • Direct connection of up to 64 Bus Terminals, expandable up to 255 terminals.
  • Internal power supply unit generating up to 1750 mA K-bus current.
  • Configuration and diagnostics supported via KS2000 software interface.

Applications

  • Decentralized industrial Ethernet network topologies.
  • Modular digital and analog I/O signal acquisition in factory automation.
  • Modbus TCP-based machine monitoring and control systems.
  • Control cabinet installations requiring isolated potential distribution.

Technical Specifications

Parameter Specification
Manufacturer BECKHOFF
Model BK9000
Product Type Ethernet TCP/IP Bus Coupler
Number of Bus Terminals 64 (up to 255 with K-bus extension)
Max. Fieldbus I/O Capacity 512 bytes input / 512 bytes output
Configuration Interface KS2000 configuration software
Supported Protocols TwinCAT ADS, Modbus TCP, Beckhoff Real-Time Ethernet
Data Transfer Rates 10/100 Mbit/s, automatic recognition
Bus Connection Interface 1 x RJ45
Transmission Medium Category 3 (10 Mbit/s) or Category 5 (100 Mbit/s) UTP/STP copper cable
Power Supply Input Voltage 24 V DC (-15% / +20%)
Input Current 70 mA + (total K-bus current)/4, maximum 500 mA
Starting Current 2.5 times continuous current
Recommended Protective Fuse Less than or equal to 10 A
Current Supply K-Bus 1750 mA
Power Contacts Rating 24 V DC / maximum 10 A
Electrical Isolation 500 V (power contact / supply voltage / fieldbus)
Operating Temperature -25 to +60 Celsius
Storage Temperature -40 to +85 Celsius
Relative Humidity 95%, non-condensing
Protection Rating IP20
Weight Approximately 170 g

Connections / Interfaces

Interface / Terminal Function
RJ45 Socket 10/100 Mbit/s Ethernet network connection
PE Contact Functional earth connection point
Power Supply Terminals 24 V DC system supply input
Power Contacts Blade terminal feed for field-side potential distribution
K-Bus Interface Internal connection contacts to adjacent Bus Terminals

Installation Guidelines

  1. Verify that the incoming power supply matches the nominal 24 V DC specification of the BECKHOFF BK9000.
  2. Ensure the system is completely de-energized before mounting, wiring, or configuring terminal connections.
  3. Mount the coupler vertically onto a standard 35 mm DIN rail (EN 60715) inside a clean, dry, IP20-rated enclosure.
  4. Slide adjacent Bus Terminals onto the rail and align them with the coupler, ensuring the K-bus locking mechanisms click into engagement.
  5. Connect the network cable to the RJ45 port using appropriate Category 5 cabling for 100 Mbit/s operation.
  6. Wire the 24 V DC power supply to the designated terminals, checking polarity and functional earth grounding.
  7. Energize the system and verify unit status using the diagnostic LEDs before commissioning the fieldbus interface.

Replacement Recommendations

When replacing a BECKHOFF BK9000 coupler, document the existing terminal ordering layout and note the exact configuration parameters, IP address settings, or subnet masks stored in the system. Ensure all power supplies are isolated before sliding terminals away from the old coupler. Set the same hardware configurations, node addresses, or software-defined parameters on the replacement unit before powering the K-bus assembly.

Compliance and Certifications

  • CE, UL, DNV GL
  • ATEX: II 3 G Ex ec IIC T4 Gc
  • IECEx: Ex ec IIC T4 Gc
Loading product navigation…

What protocols does the BECKHOFF BK9000 bus coupler support?

The BECKHOFF BK9000 supports TwinCAT ADS, Modbus TCP, and Beckhoff Real-Time Ethernet protocols over TCP/IP network infrastructures.

How many Bus Terminals can be connected directly to the BECKHOFF BK9000?

The BECKHOFF BK9000 can connect up to 64 Bus Terminals directly on a single K-bus node. This capacity can be extended up to 255 terminals using a K-bus extension terminal.

What are the power requirements of the BECKHOFF BK9000?

The BECKHOFF BK9000 requires a 24 V DC supply (-15% / +20%) and provides a continuous current of 1750 mA to the integrated K-bus.

How do I configure the network settings on a BECKHOFF BK9000?

The BECKHOFF BK9000 can be configured through the Beckhoff KS2000 configuration software interface using either the standard Ethernet connection or the unit's serial interface.

Global Express Shipping

  • Standard Delivery: 4-6 Business Days via DHL, FedEx, and UPS.
  • Express Dispatch: Same-day dispatch for in-stock orders placed before 2:00 PM (GMT+8).
  • Worldwide Coverage: Serving over 150 countries, including rapid delivery to Saudi Arabia and UAE.

Returns & Warranty

  • 30-Day Guarantee: Returns accepted for in-stock products in original, factory-sealed packaging.
  • 12-Month Warranty: Every industrial component is backed by our professional technical warranty.

Orders are processed and delivered Monday-Friday (excluding public holidays).


For full eligibility, restocking fees, and international return details, please view our official Refund & Return Policy .

TECHNICAL SPECIFICATIONS

Country of origin
Germany

Technical knowledge

1756-L73 Firmware Upgrade Guide: v19 vs v21/v31 Decision

Replacing a 1756-L73 does not automatically mean upgrading its firmware. This guide compares v19.013, v21.011 and v31.011, focusing on project compatibility, HMI communications, legacy networks and...

Implementing 3-Switch XOR Ladder Logic with Internal Bit

Implement a 3-SPST switch XOR light circuit in LogixPro or RSLogix 500 using an internal relay bit. Includes truth tables, boolean equations, and verified.

Building a Modbus RTU Network with CompactLogix and DeltaV

Integrate Allen-Bradley CompactLogix, Caterpillar ATS, and generators into DeltaV DCS over Modbus RTU. Covers ProSoft MVI69-MCM, Miille DIN266 gateways.

ONS Instruction Not Energizing OTE in Studio 5000 Ladder Logic

ONS instruction fires but the OTE coil never latches in Studio 5000 because the one-shot is only true for one scan. Use OTL/OTU or seal-in logic instead.

Kinetix 5500 EtherNet/IP Network Switch Requirements and Topology

Configure Allen-Bradley Kinetix 5500 servo drives on EtherNet/IP. Covers CIP Sync, IEEE 1588 V2 timing, Stratix selection, DLR topology, and HMI.

Moving Average Filtering in DCS and PLC Analog Control

A moving-average filter is the sliding-window smoother most instrument engineers drop into DCS and PLC analog paths. Here is how the window works, how N and sample time set lag, and when a...