The Beckhoff EJ1918 EtherCAT plug-in module is a high-performance safety I/O component designed to bring robust functional safety into modular machine concepts. Part of the Beckhoff EJ series, it integrates seamlessly into plug-in system platforms using a signal distribution board, making it ideal for highly scalable and space-optimised automation applications.

With eight digital input channels for 24 V DC signals, the EJ1918 serves as a reliable link between safe input devices—such as emergency stop buttons, light curtains, or safety switches—and safe outputs within a TwinSAFE architecture. Each input channel is processed in accordance with strict safety standards, enabling safe signal acquisition across diverse industrial scenarios. By embedding TwinSAFE Logic directly within the module, it allows decentralised safety processing, reducing the reliance on central controllers and improving both system flexibility and response reliability.

The EJ1918 communicates using the Safety over EtherCAT (FSoE) protocol, ensuring deterministic and secure transfer of safety-critical data. This protocol enables high-speed communication while guaranteeing data integrity, making the module suitable for demanding machine safety environments. With a typical response time of 4 ms from input read to E-bus write, the EJ1918 ensures fast and predictable reactions to safety-related events. In the event of an error, the module’s fault response time is directly tied to the parameterisable watchdog setting, providing engineers with fine control over system safety behaviour.

Designed with efficiency in mind, the module consumes just 290 mA (typical) from the EtherCAT E-bus, allowing integration into compact system designs without excessive power overhead. Its direct connection to a signal distribution board eliminates the need for time-consuming manual wiring, greatly simplifying installation and minimising potential wiring errors. This modular approach aligns with modern lean manufacturing and rapid deployment needs, ensuring that both machine builders and end users benefit from streamlined commissioning.

Safety compliance is a core strength of the EJ1918. Certified according to EN ISO 13849-1:2015 Category 4, Performance Level e and EN 61508:2010 SIL 3, the module delivers a high degree of reliability for risk-intensive applications. These certifications ensure that machine builders can meet stringent international safety regulations with confidence.

Overall, the Beckhoff EJ1918 combines compact design, decentralised TwinSAFE functionality, and strict adherence to safety standards, making it an indispensable module for safety-critical automation systems. It is especially valuable in applications where modularity, scalability, and functional safety must coexist seamlessly—such as packaging machines, robotics, material handling systems, and advanced production lines. By leveraging the EJ1918, engineers can create future-proof safety architectures that enhance both protection and productivity.