Beckhoff EJ9505 EJ Series Power Supply Plug-in Module

Providing a regulated low-voltage source directly on the signal distribution board, the Beckhoff EJ9505 is a high-reliability power supply plug-in module designed for demanding industrial automation environments. This module efficiently converts a 24 V DC input into a stabilized 5 V DC output, making it ideal for powering sensors, encoders, and low-voltage electronic components within the modular EtherCAT Plug-in system.

Key Features

• Stabilized 5 V DC output voltage with a tight +/- 1% tolerance window.
• Integrated short-circuit proof design to protect downstream components.
• Direct integration of diagnostic status into the controller process image.
• Compact plug-in form factor optimized for space-constrained signal distribution boards.
• Conforms to EN 61000-6-2 and EN 61000-6-4 standards for robust electromagnetic compatibility.

Industrial Applications

• High-volume serial machine manufacturing utilizing custom distribution boards.
• Compact control cabinets requiring high-density I/O and localized power distribution.
• Automated assembly lines and robotic tool integration.

Technical Specifications

Empirical Engineering Insights

Alternative Models & Compatibility

The EJ9505 is part of the Beckhoff EJ series plug-in module family. Unlike standard EtherCAT Terminals (EL/ES series), the EJ9505 requires a compatible signal distribution board (PCB) to route power and E-bus signals. It cannot be mounted directly onto a standard DIN rail without this backplane interface.

Application Pitfalls & Engineering Notes

When designing the signal distribution board, ensure that the PCB traces carrying the 5 V DC output are sized appropriately for the maximum 0.5 A current to prevent localized heating and voltage drops. If downstream 5 V sensors draw more than 0.5 A in total, the module's internal electronic fuse will trip, requiring a power cycle or load reduction to reset.

Commissioning & Wiring Tips

Map the diagnostic variables of the EJ9505 in TwinCAT to monitor the health of the 5 V supply. The process image provides real-time status indicators that can trigger system alarms before a complete voltage drop occurs, minimizing unexpected machine downtime.

Installation Guidelines