BECKHOFF BK3150 PROFIBUS Compact Bus Coupler

Description

The BECKHOFF BK3150 is a cost-optimized, space-saving PROFIBUS Compact Bus Coupler designed to integrate Beckhoff Bus Terminals directly into PROFIBUS DP networks. Operating as a decentralized fieldbus slave, this compact unit establishes a reliable bridge between the high-speed PROFIBUS fieldbus system and local KL-series and KS-series Bus Terminals (K-bus).

Housed in a compact enclosure, the BECKHOFF BK3150 automates the detection of baud rates up to 12 Mbaud, facilitating direct integration into existing industrial setups. Its design makes it highly suitable for applications where space in control cabinets is limited but reliable, deterministic modular I/O communication is required.

Features

• Cost-optimized and compact housing design for efficient space utilization.
• Direct connection to PROFIBUS DP fieldbus systems.
• Supports up to 64 Bus Terminals in a standard configuration, and up to 255 Bus Terminals using a terminal bus extension.
• Automatic baud rate detection up to a maximum of 12 Mbaud.
• Integrated RS485 physical interface using a standard D-sub connection.
• Reliable mounting mechanism utilizing a standard 35 mm DIN rail.

Applications

• Decentralized industrial control systems utilizing PROFIBUS DP architectures.
• Machine tool automation and manufacturing production lines.
• Control cabinet installations with strict physical space constraints.
• Distributed data acquisition and digital/analog signal concentration.

Technical Specifications

Connections / Interfaces

Installation Guidelines

1. Ensure the entire industrial control system is completely de-energized before beginning installation, modification, or wiring.
2. Mount the BECKHOFF BK3150 securely onto a clean, grounded 35 mm DIN rail conforming to EN 60715, ensuring the locking slide is firmly engaged.
3. Attach the required KL/KS series Bus Terminals sequentially onto the DIN rail, sliding them side-by-side into the coupler until the lateral slot-and-key connections are fully interlocked.
4. Connect the PROFIBUS network cable to the integrated 9-pin D-sub socket. If the coupler is positioned at either physical end of the PROFIBUS segment, ensure a standard active bus termination resistor is switched on at the connector.
5. Wire the 24 V DC nominal power supply to the appropriate supply terminal contact points.
6. Set the specific node address on the rotary address switches prior to commissioning the network.

Replacement Recommendations

When replacing an active BECKHOFF BK3150 unit in an existing PROFIBUS installation, document and record the current settings of the rotary address switches before removing the original coupler. Reconfigure the rotary switches on the replacement unit to match the original settings exactly before powering up the system to ensure correct identification by the PROFIBUS master controller.