The Beckhoff EL4012 EtherCAT Terminal is a versatile and compact module designed to deliver precise analog current outputs in demanding industrial automation applications. With two independent output channels in the 0…20 mA range, the EL4012 provides a reliable interface for actuators, controllers, and process devices that require current-based control signals.

Each channel offers 12-bit resolution, ensuring smooth and accurate signal generation. Combined with an output error of less than 0.1% relative to the end value, the terminal guarantees high-quality outputs suitable for applications where precision is critical. Typical uses include controlling proportional valves, driving analog actuators, or providing reference signals in test systems and process automation.

A key advantage of the EL4012 is its support for EtherCAT distributed clocks, which allow outputs to be synchronised with sub-microsecond accuracy (<< 1 µs). This feature ensures precise timing across multiple devices, which is essential in coordinated motion control, robotics, and other time-critical applications.

The terminal’s outputs are short-circuit proof and designed for loads of less than 500 Ω, providing robust protection and stable performance under a variety of operating conditions. In addition, the module incorporates 500 V electrical isolation between the E-bus and signal voltage, ensuring safe operation and protecting both the control system and field devices from electrical disturbances or ground potential differences.

Power is supplied via the 24 V DC power contacts, which simplifies wiring and ensures reliable operation in industrial settings. As part of Beckhoff’s modular EtherCAT I/O system, the EL4012 integrates seamlessly with other terminals, with all output data mapped directly into the process image of the controller for immediate access. This plug-and-play functionality reduces commissioning effort and supports flexible, scalable system design.

The EL4012 is particularly effective in applications that require accurate analog control signals. For example, in process automation, it can drive transmitters or actuators that operate on current loop signals. In machine automation, it enables precise control of analog devices such as dosing pumps or proportional valves. Its compact form factor makes it ideal for space-constrained control cabinets while maintaining functionality and reliability.

By combining dual outputs, high accuracy, distributed clock synchronisation, and robust electrical isolation, the EL4012 provides engineers with a dependable solution for implementing analog current outputs in real-time EtherCAT networks. Its versatility ensures it can be deployed across diverse industries, from manufacturing and energy to building systems and laboratory automation.

In summary, the Beckhoff EL4012 EtherCAT Terminal delivers a precise, robust, and synchronisation-ready solution for analog current output. With its two 0…20 mA channels, 12-bit resolution, short-circuit protection, and sub-microsecond synchronisation, it is an essential building block for modern automation systems requiring reliable analog control.