The Beckhoff EL2798 EtherCAT Terminal is an advanced output module designed to switch low-voltage loads through eight independent solid-state relay outputs. Offering a compact design and reliable switching performance, the EL2798 is a versatile solution for controlling actuators, signal devices, and other low-voltage loads in modern automation systems.

Each of the eight outputs is implemented as a potential-free make contact, allowing flexible control of connected loads. With a nominal operating voltage range of 0…30 V AC/DC, and the ability to support up to 48 V DC for ohmic loads, the terminal provides broad applicability across a range of industrial applications. This flexibility makes it suitable for powering indicators, solenoids, and other control devices requiring galvanic isolation.

The module delivers a maximum current of 2 A per channel, with a combined current capacity of up to 10 A across all outputs. This high channel density allows engineers to integrate multiple outputs in a single compact module, reducing wiring effort and saving valuable cabinet space. However, the module is not short-circuit proof; therefore, care must be taken to design circuits with proper external protection and consideration of the load’s peak current requirements.

The EL2798 features fast switching characteristics, with a typical turn-on time of 1.8 ms and a turn-off time of 30 ms. This responsiveness ensures precise control of loads, even in time-sensitive automation processes, while maintaining reliable switching behaviour across all channels. In addition, the solid-state relay design provides long service life with no mechanical wear, making the module particularly suited for high-frequency switching tasks.

Safety and reliability are further reinforced by the module’s breakdown voltage rating of 80 V, ensuring protection and robustness during operation. The 2-wire connection technology simplifies wiring, further reducing installation time and effort.

As part of Beckhoff’s EtherCAT I/O system, the EL2798 integrates seamlessly into distributed control architectures. The EtherCAT protocol ensures real-time communication with minimal latency, allowing precise synchronisation of outputs with other control system functions. Data from the outputs is directly mapped into the process image, providing fast and straightforward access for the control system without additional configuration.

The compact design and high channel density of the EL2798 make it an excellent choice for applications where space and efficiency are priorities. Typical use cases include machine building, packaging equipment, and building automation systems, where low-voltage loads need to be controlled reliably and with long operational lifespans.

In summary, the Beckhoff EL2798 EtherCAT Terminal combines the durability of solid-state relay technology with the flexibility of eight potential-free outputs. With its wide voltage range, robust current handling, fast switching times, and seamless EtherCAT integration, it provides a high-performance solution for switching low-voltage loads in industrial automation systems.