The Beckhoff EL1104 EtherCAT Terminal is a compact digital input module designed to acquire binary control signals in automation environments with speed, reliability, and efficiency. Featuring four input channels, the EL1104 is ideal for capturing signals from a wide range of field devices such as push buttons, limit switches, sensors, and other 24 V DC sources.

The terminal operates at a nominal voltage of 24 V DC with an acceptable tolerance of –15% to +20%, providing robust performance in demanding industrial conditions. Each channel complies with the EN 61131-2 standard (types 1 and 3), ensuring compatibility with industry-standard sensors and guaranteeing consistent input behaviour across different applications. With a typical input current of 3 mA (type 3), the EL1104 ensures energy-efficient operation without compromising performance.

Signal stability is a key aspect of the EL1104’s design. Each input is equipped with an integrated filter stage, providing a typical response time of 3.0 ms. This filtering reduces the impact of electrical noise and ensures that only valid signals are processed, an essential feature in environments with high levels of electromagnetic interference. The result is reliable signal acquisition, even in challenging industrial settings.

From a system integration perspective, the EL1104 is designed for simplicity and flexibility. It supports both 2-wire and 3-wire connection technology, making it easy to connect a wide range of sensors and devices with minimal wiring complexity. Its typical current consumption of just 2 mA plus load via the power contacts further highlights its efficiency, allowing it to be integrated into distributed I/O networks without imposing heavy demands on the power supply.

As part of the Beckhoff EtherCAT family, the EL1104 benefits from high-speed, deterministic communication with the controller. This ensures that input states are transmitted and updated in real time, enabling precise and synchronised control across distributed systems. Whether used in machine automation, building management, or process control, the EL1104 delivers accurate and consistent digital input acquisition.

With its compact EtherCAT terminal format, the EL1104 saves space in control cabinets while offering scalability for future system expansion. It can be seamlessly combined with other Beckhoff I/O modules, including analogue, digital, and safety terminals, providing engineers with the flexibility to build tailored automation solutions.

In summary, the Beckhoff EL1104 offers a reliable, efficient, and standards-compliant solution for digital input acquisition. With four channels, built-in filtering, and seamless EtherCAT integration, it ensures robust performance across a wide range of industrial applications where accuracy and reliability are essential.