Number of Bus Terminals: 64 (255 with K-bus extension)
Max. number of bytes fieldbus: 128 byte input and 128 byte output
Max. number of bytes process image: 512 byte input and 512 byte output
Digital peripheral signals: 2,040 inputs/outputs
Analog peripheral signals: 128 inputs/outputs
Data transfer rates: automatic detection up to 12 Mbaud
Bus interface: 1 x D-sub socket, 9-pin

Integrated Controller: Combines fieldbus coupling and PLC functionality in a single unit for PROFIBUS networks.
High I/O Capacity: Supports up to 64 Bus Terminals (expandable to 255 with K-bus extension) for scalable installations.
Robust Data Handling: Provides up to 128 bytes input and 128 bytes output via fieldbus, with 512 bytes per process image.
Flexible Communication: PROFIBUS interface with automatic baud rate detection up to 12 Mbaud, via standard 9-pin D-sub connector

The Beckhoff BC3150 PROFIBUS Bus Terminal Controller is a versatile automation component designed to merge I/O connectivity, fieldbus communication, and local PLC capability into one compact unit. Acting as both a controller and a PROFIBUS slave, it provides efficient integration of Beckhoff’s modular Bus Terminals into PROFIBUS-based automation architectures.

The BC3150 supports up to 64 Bus Terminals, covering digital, analog, and specialty functions. For larger and more complex projects, its capacity can be expanded to 255 terminals using a K-bus extension, ensuring sufficient flexibility for diverse applications. This scalability makes the BC3150 equally suitable for small standalone systems and large distributed control environments.

In terms of data handling, the BC3150 is engineered to manage significant I/O volumes. Over the PROFIBUS fieldbus, it supports up to 128 bytes of input data and 128 bytes of output data, ensuring smooth communication with the higher-level master. At the same time, its process image capacity extends to 512 bytes each for input and output, offering ample resources for processing larger and more complex signal sets within the controller.

The terminal controller can manage up to 2,040 digital signals and 128 analog signals, highlighting its suitability for high-density I/O applications. From simple digital switching tasks to precise analog signal monitoring, it provides the flexibility to meet a wide range of automation requirements.

The PROFIBUS interface features a 9-pin D-sub connector for reliable wiring and connection to industrial networks. With automatic baud rate detection up to 12 Mbaud, the BC3150 ensures compatibility with both legacy and modern PROFIBUS installations, simplifying commissioning and reducing setup effort.

Unlike a standard bus coupler, the BC3150 incorporates programmable logic control functionality, enabling it to execute control tasks independently. Using IEC 61131-3 programming environments such as TwinCAT, the BC3150 can perform local logic processing, reducing the load on higher-level controllers and improving system responsiveness.

The BC3150 is well suited for applications requiring both decentralised control and seamless integration with PROFIBUS. In machine automation, it can serve as a compact controller for standalone modules while remaining connected to a plant-wide system. In process automation, it provides reliable integration of distributed sensors and actuators. In building automation, it enables decentralised control of HVAC, lighting, and monitoring systems, all tied into a PROFIBUS backbone.

In summary, the Beckhoff BC3150 PROFIBUS Bus Terminal Controller is a flexible and powerful solution for integrating modular I/O into PROFIBUS networks. With integrated PLC capability, high channel capacity, robust data throughput, and automatic baud rate detection, it offers engineers a compact and future-proof controller for decentralised automation systems.