The Beckhoff EL4122 EtherCAT Terminal is a high-accuracy analogue output module designed to generate standardised current signals for industrial automation and process control applications. With two independent output channels, each capable of delivering 4…20 mA, the EL4122 provides a robust and compact solution for driving actuators, controllers, and instrumentation that rely on current loop signals.

The 4…20 mA current loop standard is widely used in industrial environments for its reliability and noise immunity. By offering two channels in a single terminal, the EL4122 achieves high channel density in a compact form factor, reducing cabinet space requirements and simplifying system design.

With its 16-bit resolution, the EL4122 delivers finely detailed signal generation, enabling precise control of proportional actuators, dosing systems, or process variables. The module ensures outstanding accuracy, with an output error of less than 0.1% relative to end value, making it well suited for applications where precision and stability are critical.

The terminal also integrates EtherCAT distributed clock technology, ensuring outputs can be synchronised across multiple devices with sub-microsecond accuracy (<< 1 µs). This timing precision is vital for applications requiring coordinated control, such as synchronised motion systems, multi-axis actuation, or time-sensitive process regulation.

Each channel is designed for reliability, being short-circuit proof and capable of driving loads up to 500 Ω. Power is supplied via the 24 V DC power contacts, ensuring stable operation in distributed automation environments. These protective features enhance durability while minimising downtime caused by wiring errors or overloads.

The EL4122 integrates seamlessly into Beckhoff’s modular EtherCAT I/O system, allowing it to be combined with digital, analogue, motion, and safety terminals to create tailored automation solutions. Configuration, diagnostics, and monitoring are supported through the TwinCAT software environment, making commissioning straightforward and system maintenance efficient.

Typical applications include process automation, where the terminal provides precise setpoints for pressure, temperature, or flow controllers; machine automation, where it controls proportional valves, variable-speed drives, or analogue actuators; and test and measurement systems, where high-resolution and time-synchronised current output are essential. Its robustness also makes it suitable for decentralised installations in demanding environments such as energy systems, chemical plants, and building automation.

In summary, the Beckhoff EL4122 EtherCAT Terminal combines precision, robustness, and integration in one compact module. With two channels of 4…20 mA current output, 16-bit resolution, distributed clock synchronisation, and low error rates, it delivers reliable and accurate analogue control for a wide variety of industrial automation tasks.