BK3120 | Beckhoff PROFIBUS DP V1 Bus Coupler Economy Plus 24 V DC

Beckhoff · Industrial Automation & Electrical

Description  The Beckhoff BK3120 is a PROFIBUS DP V1 Bus Coupler from the Economy Plus series, designed for efficient integration of Bus Terminals into PROFIBUS networks. It supports automatic baud rate detection up to 12 Mbaud and allows connection of up to 255 distributed Bus Terminals via K-bus extension technology.     Technical Specifications  Condition New/Never Used Surplus Brand Beckhoff Category Industrial Automation Part Number BK3120 Subcategory Bus Coupler Protocol PROFIBUS DP V1 Max. Terminals Supported 64 Bus Terminals (255 with K-bus extension) Fieldbus Data Capacity 128 bytes input / 128 bytes output Data Transfer Rates Auto-detect up to 12 Mbaud Bus Interface 1 × D-sub 9-pin socket, shielded Data Medium Shielded copper cable, 2 × 0.25 mm² Power Supply 24 V DC (-15% / +20%) Input Current 70 mA + (total K-bus current)/4, max. 500 mA K-bus Current Supply 1750 mA Power Contacts Max. 24 V DC / 10 A Electrical Isolation 500 V (power contact/supply voltage/fieldbus) Supported Services PROFIBUS DP V1 services for parameterization and configuration Configuration Automatic baud rate detection Mounting Type DIN-rail Housing Modular plastic housing, IP20 Operating Temperature -25°C to +60°C Storage Temperature -40°C to +85°C Relative Humidity 95%, non-condensing Weight Approx. 170 g   Information About BK3120 The BK3120 is part of Beckhoff’s PROFIBUS Bus Coupler series and provides a cost-effective and high-performance interface for connecting modular I/O systems to PROFIBUS networks. The Economy Plus version enhances functionality by supporting K-bus extension technology, which allows the connection of up to 255 Bus Terminals across distributed locations. It supports PROFIBUS DP V1 services, enabling parameterization, diagnostics, and limit value adjustment for complex analog modules directly from the controller. The coupler automatically detects baud rates up to 12 Mbaud, ensuring optimal communication performance across diverse automation environments. Designed for industrial use, the BK3120 provides electrical isolation, robust EMC protection, and reliable 24 V DC operation for stable integration into distributed automation architectures. Key Features: Expanded I/O Capacity: Supports up to 64 standard or 255 extended Bus Terminals using K-bus extension technology, ideal for scalable systems. PROFIBUS DP V1 Compliance: Enables fast data exchange and advanced communication features such as parameterization and diagnostic access. High-Speed Communication: Automatically detects and supports baud rates up to 12 Mbaud for optimized network performance. Large Data Throughput: Capable of handling up to 128 bytes of input and 128 bytes of output data for complex control tasks. Direct Terminal Access: PROFIBUS DP V1 services allow real-time register access and configuration of individual Bus Terminals. Flexible Topology Integration: Uses shielded copper cabling with D-sub connection for reliable and interference-free data transmission. Electrical Isolation: 500 V isolation between power supply, fieldbus, and I/O ensures safe operation and protection against noise. Robust Industrial Design: Operates within a wide temperature range (-25°C to +60°C) and withstands up to 95% relative humidity. Simplified Installation: Compact DIN-rail housing with automatic baud rate detection and minimal configuration requirements. Reliable Power Delivery: Integrated K-bus supply up to 1750 mA and 10 A power contact capacity for connected modules. The BK3120 delivers the reliability, scalability, and communication precision required for integrating modular I/O terminals into PROFIBUS-based automation networks.

Brand: Beckhoff · Category: Industrial Automation & Electrical

Key features

• Expanded I/O Capacity: Supports up to 64 standard or 255 extended Bus Terminals using K-bus extension technology, ideal for scalable systems.
• PROFIBUS DP V1 Compliance: Enables fast data exchange and advanced communication features such as parameterization and diagnostic access.
• High-Speed Communication: Automatically detects and supports baud rates up to 12 Mbaud for optimized network performance.
• Large Data Throughput: Capable of handling up to 128 bytes of input and 128 bytes of output data for complex control tasks.
• Direct Terminal Access: PROFIBUS DP V1 services allow real-time register access and configuration of individual Bus Terminals.
• Flexible Topology Integration: Uses shielded copper cabling with D-sub connection for reliable and interference-free data transmission.
• Electrical Isolation: 500 V isolation between power supply, fieldbus, and I/O ensures safe operation and protection against noise.
• Robust Industrial Design: Operates within a wide temperature range (-25°C to +60°C) and withstands up to 95% relative humidity.
• Simplified Installation: Compact DIN-rail housing with automatic baud rate detection and minimal configuration requirements.
• Reliable Power Delivery: Integrated K-bus supply up to 1750 mA and 10 A power contact capacity for connected modules.

Specifications

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