Beckhoff BK1120 – Overview The Beckhoff BK1120 is an EtherCAT bus coupler designed to connect the EtherCAT protocol (100BASE-TX) to standard Beckhoff K-Bus terminals. It provides two RJ45 ports for line or star topology connection and supports up to 64 terminals (or up to 255 with K-Bus extension). Compact and efficient, the BK1120 operates on 24 V DC, forwarding both system and field power through integrated power contacts. It offers high data rates and easy DIN-rail installation for industrial automation environments. Key Features EtherCAT bus coupler for K-Bus terminals 2 × RJ45 ports for flexible network configuration Supports up to 64 terminals (255 with extension) 100 Mbps EtherCAT communication speed 24 V DC system and field power Up to 10 A field current via power contacts Compact DIN-rail mountable housing 500 V electrical isolation between supply and Ethernet Technical Specifications Part Numbers: – BK1120 – BK 1120 Protocol: EtherCAT (100BASE-TX) Network Interface: 2 × RJ45 ports Maximum Number of Terminals: 64 (255 with K-Bus extension) Fieldbus Data Capacity: 1024 bytes input / 1024 bytes output Power Supply: 24 V DC (–15% / +20%) Power Contacts: Max. 24 V DC / 10 A Current Consumption (E-Bus): 70 mA + sum of K-Bus current / 4 K-Bus Current Supply: Max. 1750 mA Operating Temperature: –25 °C to +60 °C Storage Temperature: –40 °C to +85 °C Isolation Voltage: 500 V (Ethernet / Power) Enclosure Type: IP20 Mounting: DIN-rail Manufacturer: Beckhoff Automation Weight: 0.10 – 0.23 kg (0.22 – 0.50 lb) Packed dimensions: 12 × 7 × 6 cm (4.7 × 2.8 × 2.4 in) Applications Integration of standard K-Bus terminals into EtherCAT systems Distributed control systems and modular I/O architectures Compact industrial control panels Factory automation and process control applications Why Choose Beckhoff BK1120 Reliable EtherCAT to K-Bus integration Compact and easy to mount on DIN rail Flexible configuration for high I/O counts Efficient 24 V DC design for industrial control environments Order Now The Beckhoff BK1120 EtherCAT Bus Coupler is available for order and ships worldwide.
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