Beckhoff EL6751-0010 EtherCAT Terminal CANopen Master/Slave Interface

Description

Integrating seamlessly into industrial fieldbus topologies, the Beckhoff EL6751-0010 EtherCAT Terminal serves as a high-performance communication gateway for linking CANopen protocols directly to an EtherCAT network. This 1-channel communication interface offers bidirectional translation, operating smoothly in either master or slave modes to harmonize field device communication with high-speed controllers. Engineered to minimize system overhead, the unit utilizes standard EtherCAT transport structures to transmit CANopen data frames without bottlenecking processing cycle times.

Features

• Multi-Role Capability: Operates as a CANopen network master, a CANopen manager, or optionally as a CANopen slave.
• Broad Transfer Rates: Supports standard baud rates including 10, 20, 50, 100, 125, 250, 500, 800, and 1000 kbaud.
• Electrical Protection: Integrated 9-pin D-sub port is galvanically decoupled to prevent electrical noise propagation across sub-systems.
• Real-Time Diagnostics: Front-facing status LEDs display immediate operating states and communication faults.
• Compact Form Factor: Standard 24 mm housing matches other terminal designs for quick, uniform DIN-rail installation.

Applications

• Integration of legacy CANopen-based drives, encoders, and pneumatic manifolds into EtherCAT architectures.
• Decentralized control subnetworks in packaging systems, assembly machines, and material handling systems.
• Inter-system communication linkages between separate PLC modules and external sub-control units.

Technical Specifications Table

Connections and Interfaces

Empirical Engineering Insights

Alternative Models & Compatibility

The EL6751-0010 serves primarily as a CANopen slave interface profile. If a pure CANopen master connection is required without slave operational modes configured in your software environment, ensure your TwinCAT System Manager software is updated to recognize the differences in the hardware description files (ESI XML) between standard EL6751 modules and the EL6751-0010 variant. Firmware mismatches during online scan discovery can result in safe-operational state transition errors.

Application Pitfalls & Engineering Notes

When utilizing this terminal at transmission rates above 500 kbaud, transmission distance drops sharply. Ensure total network branch lengths do not violate standard CANopen cabling limits. At 1000 kbaud, keep segment lines shorter than 40 meters. Avoid running the communication cable in the same cable tray as motor leads to minimize induction currents interfering with the CAN transceiver differential voltages.

Commissioning & Wiring Tips

Always insert a standard 120-ohm termination resistor between Pin 2 and Pin 7 at the physical physical ends of your CANopen bus run. The EL6751-0010 does not provide switchable internal bus termination. Standard diagnostic protocols in TwinCAT require manual bus scanning; if the physical node remains unresponsive, check that the E-bus power feed terminal can handle the terminal's 230 mA power consumption alongside other high-current modules in your stack.

Installation Guidelines