BK1120 | Beckhoff EtherCAT Bus Coupler, 100BASE-TX, Supports Up to 64 Terminals

Allen-Bradley · Cables & Connectivity

Description  The Beckhoff BK1120 EtherCAT Bus Coupler links the EtherCAT fieldbus system with Beckhoff Bus Terminals, converting Ethernet 100BASE-TX telegrams to the internal terminal bus. It supports automatic process image assignment and enables modular expansion for flexible industrial I/O architectures.     Technical Specifications  Condition New/Never Used Surplus Part Number BK1120 Manufacturer Beckhoff Category PLCs/Machine Control Subcategory PLC Module/Rack Number of Bus Terminals 64 (255 with K-Bus extension) Max. Fieldbus Data 1024 bytes input / 1024 bytes output Configuration KS2000 or EtherCAT (ADS) Data Transfer Rate 100 Mbit/s Bus Interface 2 × RJ45 Medium Ethernet/EtherCAT Cat.5 cable Power Supply 24 VDC (-15% / +20%) Input Current 70 mA + K-Bus current/4 (max. 500 mA) Starting Current Approx. 2.5× continuous current Recommended Fuse ≤ 10 A K-Bus Current Supply 1750 mA Power Contacts Max. 24 VDC, 10 A Electrical Isolation 500 V (contacts/supply/Ethernet) Max. Station Distance 100 m (100BASE-TX) Data Transfer Time 0.01 ms (10 modules, 32-bit I/O, no K-Bus runtime) Operating Temp. –25…+60 °C Storage Temp. –40…+85 °C Relative Humidity 95% (non-condensing) Vibration/Shock EN 60068-2-6 / EN 60068-2-27 EMC EN 61000-6-2 / EN 61000-6-4 Protection Rating IP20 Weight Approx. 150 g Approvals CE, UL, ATEX, IECEx     Information About BK1120 The Beckhoff BK1120 EtherCAT Bus Coupler provides seamless interfacing between the EtherCAT fieldbus and the Bus Terminal system by translating Ethernet 100BASE-TX telegrams into the internal, fieldbus-independent terminal bus. A standard station supports up to 64 Bus Terminals plus an end terminal, while the K-Bus extension allows installations to scale up to 255 terminals. The coupler integrates two RJ45 interfaces—one for upstream communication and the other for cascading downstream EtherCAT devices—enhancing network versatility. With direct 24 VDC system and field supply inputs, the BK1120 distributes communication and load power efficiently across connected terminals. Its robust isolation, high-speed transfer performance, and compliance with industrial standards make it a reliable backbone component for modular EtherCAT architectures. Key Features: High-speed EtherCAT interface: Converts Ethernet 100BASE-TX telegrams to the internal terminal bus for fast and deterministic communication. Scalable system architecture: Supports 64 Bus Terminals natively and up to 255 terminals with K-Bus expansion, enabling large I/O stations. Dual RJ45 ports: Allows network daisy-chaining and simplified EtherCAT topology design in complex installations. Robust electrical design: 500 V isolation and 10 A power contacts ensure reliable operation in industrial environments. Automatic process image assignment: Reduces configuration time and ensures seamless integration with EtherCAT masters. Wide environmental tolerance: Operates from –25°C to +60°C with full industrial EMC compliance for harsh applications. Flexible configuration options: Programmable via KS2000 or EtherCAT ADS for versatile system integration. The BK1120 delivers the reliability and precision required for scalable, high-speed EtherCAT-based automation systems.

Brand: Allen-Bradley · Category: Cables & Connectivity

Key features

• High-speed EtherCAT interface: Converts Ethernet 100BASE-TX telegrams to the internal terminal bus for fast and deterministic communication.
• Scalable system architecture: Supports 64 Bus Terminals natively and up to 255 terminals with K-Bus expansion, enabling large I/O stations.
• Dual RJ45 ports: Allows network daisy-chaining and simplified EtherCAT topology design in complex installations.
• Robust electrical design: 500 V isolation and 10 A power contacts ensure reliable operation in industrial environments.
• Automatic process image assignment: Reduces configuration time and ensures seamless integration with EtherCAT masters.
• Wide environmental tolerance: Operates from –25°C to +60°C with full industrial EMC compliance for harsh applications.
• Flexible configuration options: Programmable via KS2000 or EtherCAT ADS for versatile system integration.

Specifications

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