Beckhoff EL1104 4-Channel Digital Input Terminal

Beckhoff EL1104 is a four‑channel EtherCAT digital input terminal that interfaces field sensors with a 24 V DC supply, transmitting binary signals to the host controller in an electrically isolated form and supporting both 2‑wire and 3‑wire sensor configurations. It provides an internal sensor supply (+24 V) connected to the positive power contact, simplifying wiring for devices that require their own supply. Each channel benefits from a 3 ms input filter to debounce and suppress noise on fast‑changing signals, improving reliability in industrial environments, and the module carries IP20 protection for indoor applications. The EL1104 is designed for mounting on a 35 mm DIN rail per EN 60715 and is part of Beckhoff’s EL10xx family of digital input terminals used in EtherCAT networks with TwinCAT software for reliable process monitoring and machine control.