BECKHOFF EL7047 EtherCAT Terminal

Description

The BECKHOFF EL7047 is a high-performance EtherCAT Terminal designed as a 1-channel motion interface for direct connection and control of 2-phase stepper motors. Operating at voltages up to 48 V DC and supporting an output current of up to 5 A, this compact drive terminal integrates advanced field-oriented vector control and a dedicated feedback interface to deliver precise and dynamic motion control.

By implementing vector control, the BECKHOFF EL7047 optimizes motor operation by dynamically adjusting the current vector. This results in smoother motor rotation, significantly reduced resonance, lowered operating temperatures, and increased energy efficiency compared to standard microstepping methods. The integrated incremental encoder input enables closed-loop positioning, tracking, and travel distance control directly within the EtherCAT system architecture.

For demanding drive applications requiring increased thermal performance, the terminal's output current capacity can be expanded up to 6.5 A by mounting the optional ZB8610 fan cartridge. The 12 mm terminal housing fits seamlessly into standard EtherCAT Terminal segments, utilizing high-speed E-bus communication and Distributed Clocks (DC) for highly synchronized multi-axis coordination.

Features

• 1-channel motion interface for unipolar and bipolar 2-phase stepper motors.
• Field-oriented vector control for optimal torque utilization, smooth running, and low heat generation.
• Integrated incremental encoder interface (5 to 24 V DC) for closed-loop positioning and feedback.
• Dedicated outputs for stepper motor phases and a 24 V DC motor holding brake.
• Performance expansion up to 6.5 A possible with the optional ZB8610 fan cartridge.
• Support for Distributed Clocks (DC) to ensure precise real-time synchronization.
• Compact 12 mm DIN rail mount design featuring diagnostic and status LEDs.

Applications

• Closed-loop and open-loop positioning of compact drive axes in industrial automation.
• Synchronized multi-axis motion in packaging, assembly, and materials handling systems.
• Feed drives and adjustment mechanisms requiring integrated motor brakes.
• Pick-and-place systems and small-scale gantry robots.

Technical Specifications

General

Electrical Data

Inputs and Outputs

EtherCAT and Communication

Mechanical and Environmental

Installation Guidelines

1. Ensure all electrical supplies (E-bus control and external motor power) are completely de-energized and locked out prior to installation or servicing.
2. Snap the terminal securely onto a standard 35 mm DIN rail, ensuring appropriate mechanical locking with adjacent terminals.
3. Verify that the external motor power supply does not exceed the specified maximum of 48 V DC.
4. Wire the stepper motor phases and feedback encoder to the corresponding terminals using proper gauge wire (0.08 to 2.5 mm² depending on wire type) and secure shielding.
5. Provide sufficient clearance for ventilation. If operating at continuous high currents or using the ZB8610 fan cartridge, ensure optimal airflow pathing.
6. Configure the EtherCAT segment in TwinCAT and map the hardware parameters before enabling the power stage.

Replacement Recommendations

• When replacing a faulty terminal, record the existing physical wiring and software configurations in the controller before disconnecting the unit.
• Ensure the replacement terminal matches model number EL7047 to maintain compatibility with your motor profiles, encoder signals, and drive parameters.
• Verify that firmware and TwinCAT ESI configuration parameters match your system engineering environment.