Beckhoff Automation EL2904 Safety Output Terminal

The Beckhoff EL2904 EtherCAT Safety Output Terminal is a safety-rated digital output module that provides four 24 V DC safety outputs for use in EtherCAT safety architectures powered by TwinSAFE technology. This DIN-rail terminal integrates directly with Beckhoff TwinSAFE and EtherCAT master controllers on the EtherCAT bus to drive actuators, safety relays, or power-down circuits in certified safety control systems. Typical applications include emergency stop systems, safety interlock circuits, guard door monitoring, robotic safety zones, and automated production lines requiring certified safety outputs. Key specs: 4 safety output channels, 24 V DC output, TwinSAFE safety technology, EtherCAT interface, DIN rail mounting, operating temperature 0°C to 55°C, designed for safety control systems (SIL/PL depending on configuration). Common replacements: Beckhoff EL1904, Beckhoff EL2004, Siemens 6ES7 138-4FB03-0AB0.