Beckhoff EL1004 4-Channel Digital Input Terminal

Beckhoff EL1004 is an EtherCAT Terminal that provides four digital input channels for 24 V DC signals, designed to read binary process states from sensors and pushbuttons and to convey debounced logic values to the EtherCAT master. Each channel includes a dedicated LED to indicate its current state, while the 3 ms input filter helps reject chatter from mechanical contacts and noisy environments. The four inputs are electrically isolated from the bus with an isolation rating up to 2,500 V, protecting the controller and reducing cross-talk in multi-device installations. As a member of Beckhoff’s EL1xxx digital input family, the EL1004 integrates into Beckhoff EtherCAT networks as a four-channel module designed specifically for 24 V DC operation. Typical applications span manufacturing automation where four independent binary signals are needed—examples include conveyor sensor arrays, end-stop switches, safety interlocks, and start/stop pushbutton networks—delivering reliable, isolated inputs in a compact terminal form factor. This module pairs with a Beckhoff EtherCAT system to provide consistent response times and straightforward wiring of standard 24 V sensors.