Beckhoff EtherCAT Bus Coupler BK-Series EKxxxx | Bus Couplers Supplier | SIMPLYBUY
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Beckhoff EtherCAT Bus Coupler BK-Series EKxxxx | Bus Couplers
Beckhoff EtherCAT Bus Coupler BK-Series EKxxxx | Bus Couplers - Image 2
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Beckhoff EtherCAT Bus Coupler BK-Series EKxxxx | Bus Couplers

Manufacturer: Beckhoff
Series: EKxxxx / BK-series Bus Couplers
Bus Protocol: EtherCAT (100BASE-TX, 100 Mbps)
Interface: 2 × RJ45 (Ethernet in / EtherCAT out)
Fieldbus Data Capacity: 1024 byte input / 1024 byte output
Supply Voltage: 24 V DC (–15% / +20%)

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Product Description

The Beckhoff EKxxxx / BK-series Bus Couplers act as a bridge between EtherCAT networks and modular Bus Terminals, delivering reliable, deterministic fieldbus connectivity. With 100 Mbps Ethernet, dual RJ45 ports, and support for up to 64 (or 255 with extension) Bus Terminals, this coupler enables flexible system expansion and mixed-signal integration. Compact DIN-rail housing and 24 V DC supply make it ideal for industrial control cabinets, while built-in power distribution simplifies wiring.

Standard Features

  • Fieldbus Bridging: Converts EtherCAT telegrams to standard Bus Terminal signals automatically

  • High-Speed Data Transfer: 100 Mbps Ethernet ensures fast and deterministic I/O communication

  • Modular Expansion: Supports up to 64 (255 with extension) Bus Terminals for scalable system design

  • Dual-Port EtherCAT: Two RJ45 ports support daisy-chain or line topology for flexible network layout

  • Power Distribution: Supplies system and field power to all connected modules, with up to 10 A output on power contacts

  • Automatic Configuration: Bus coupler auto-detects connected terminals and integrates them into EtherCAT process image

  • Compact Mounting: DIN-rail mountable housing with standard industrial enclosure (IP20)

  • Wide Operating Range: Operating temperature –25 °C to +60 °C, suitable for harsh industrial environments

Technical Specifications

ModelDescription / Bus TypeMax TerminalsSupply VoltageProtection Rating
BK1120EtherCAT → K-Bus standard Bus Coupler64 (max 255 w/ extension)24V DCIP20
BK1150Compact EtherCAT Bus Coupler for K-Bus Terminals64 (max 255 w/ extension)24V DCIP20
BK1250Mixed EtherCAT/K-Bus Coupler (E-bus ↔ K-Bus)Up to 64 (255 with extension)24V DCIP20

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