BK3150 Beckhoff PROFIBUS DP Compact Bus Coupler 12Mb Aud 24VDC D-sub 9-pin Connector 64

BK3150 Beckhoff PROFIBUS DP Compact Bus Coupler 12Mb Aud 24VDC D-sub 9-pin Connector 64

1.Overview of the BK3150 Beckhoff

The Beckhoff BK3150 Bus Coupler is a compact, highly scalable, and ruggedly reliable product. It effectively integrates Beckhoff's extensive range of Bus Terminals into PROFIBUS DP networks, helping engineers build efficient and flexible automation control systems.

Designed with practicality and cost-effectiveness in industrial applications in mind, the BK3150 offers the following key features:

Powerful scalability and flexibility: A single BK3150 coupler can directly connect up to 64 Bus Terminals. Expansion via the K-bus terminal bus increases the number of modules in a station to 255, easily accommodating complex I/O configurations and providing exceptional system flexibility.

Easy configuration and connection: The coupler automatically detects the network baud rate, simplifying network setup. It is equipped with two address selector switches for easy on-site PROFIBUS address assignment. The standard 9-pin D-sub connector also ensures reliable and convenient fieldbus connection.

Rugged and durable for industrial environments: The BK3150 is designed to meet multiple industrial standards, including vibration and shock resistance in compliance with EN 60068-2-6/EN 60068-2-27/29, and electromagnetic interference immunity in compliance with EN 61000-6-2/EN 61000-6-4. It can operate stably in harsh conditions, including 95% relative humidity (non-condensing).

Compact design and cost-effective: The product's compact housing helps save installation space in control cabinets. Furthermore, its cost-optimized design ensures a high price/performance ratio while delivering powerful functionality.

2.Core Features:

Model: BK3150
Fieldbus: PROFIBUS DP (EN 50170)
Automatic baud rate: 9.6 kbaud to 12 Mbaud, no manual setting required
Maximum I/O data: 128 bytes input / 128 bytes output
Number of connectable terminals: 64 (standard K-bus); up to 255 with K-bus expansion
Number of bus stations: 32 per segment, up to 100 with repeaters
Cable length: 1,200 m @ 9.6 kbaud → 100 m @ 12 Mbaud
Bus interface: 1 x D-sub 9-pin female, shielded, compatible with ZS1031-3000 / ZB3100 connectors
Address setting: 2-position rotary switch (0-99)
Operating voltage: 24 V DC (-15% / +20%)
Input current: 70 mA + (total K-bus current / 4), maximum 500 mA
K-bus power supply: 1,000 mA (typical), can directly power digital and analog terminals
Power contact: Maximum 24 V DC / 10 A, for field-side load circuits
Electrical isolation: 500 Vrms (power supply ↔ K-bus ↔ PROFIBUS)
Isolation: Three-way full isolation, burst immunity: Class 4
Diagnostic LEDs: PWR, RUN, BF, I/O, four-color status indication
Operating temperature: 0 to +55°C (-25 to +60°C with derating)
Storage temperature: -40 to +85°C
Relative humidity: 95% RH, non-condensing
Protection degree: IP20 (EN 60529)
Vibration/shock resistance: EN 60068-2-6/27/29, 5 g vibration, 30 g shock
EMC: EN 61000-6-2 (immunity) / EN 61000-6-4 (Emissions)
Certifications: CE, UL, cUL, ATEX II 3 G Ex nA IIC T4 Gc
Weight: ≈ 100 g
Mount: 35 mm DIN rail, horizontal or vertical

Core Features
Plug and Play: GSD files can be imported with one click, and TwinCAT, STEP 7, and TIA Portal automatically identify station addresses and slot mapping.
Auto-baud rate: Locks to the master station speed within 2 seconds after power-up, requiring no software configuration.
Modular expansion: Supports mixed insertion of a full range of KL/EL terminals, including digital, analog, thermocouple, high-speed counter, PWM, and safety terminals.
Safety value output: Preset safety states (off/hold/substitute value) can be set in the event of a bus interruption to prevent actuator malfunction.
Remote diagnostics: Real-time reporting of station, power supply, and K-bus faults via LEDs and master diagnostic words, with support for TwinCAT Scope waveform recording.
Long-distance communication: Built-in RS-485 driver enables stable operation up to 400 meters at 500 kbaud, meeting the needs of large distributed production lines.
Low power consumption: The entire device consumes 1.7 W and can be powered directly from the 24 V power supply within the PLC cabinet, eliminating the need for an additional power supply module. Industrial-grade environmental resistance: Suitable for long-term operation in -25°C cold storage logistics and +55°C injection molding workshops. ATEX Zone 2 explosion-proof certification makes it suitable for hazardous areas such as spray painting and ink processing.

Typical Applications
Automobile welding: An S7-300 PLC + BK3150 controls 64 KL/EL terminals, driving robotic welding tongs and fixtures.
Logistics sorting: PROFIBUS bus with 12 Mbps, 32 BK3150 slaves per segment, controlling 2,000 roller motors.
Packaging machine upgrade: Retain the existing DP master, only replacing the I/O modules, completing the upgrade in 4 hours.
Wind turbine converter: In-cabinet startup at -25°C, Ex nA certified, for nacelle 24 V distributed I/O.

3.Product details pictures

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