The Beckhoff KL4022 Bus Terminal is a reliable analog output module designed to deliver standardised current signals for industrial control and automation applications. Featuring two independent outputs, it generates 4…20 mA current loops, the widely adopted industry standard for transmitting analogue control values such as speed, position, or process variables. With its compact form factor and integration into the modular Bus Terminal system, the KL4022 offers both flexibility and precision in distributed automation networks.

Each of the two output channels is designed as a single-ended current source, enabling straightforward wiring and integration into existing control architectures. The terminal’s 12-bit resolution provides a fine level of detail in output signal generation, ensuring that control systems can achieve accurate and stable operation even in demanding environments. With an output error of less than ±0.1% relative to the end value, the KL4022 guarantees precise analogue control for applications requiring consistent accuracy.

The KL4022 is designed to support loads of up to 500 Ω, making it suitable for driving a wide variety of actuators, transducers, and current-loop devices. Typical applications include controlling valve positions, adjusting actuator speeds, or providing analogue setpoints for drives and controllers. By offering stable and precise current output, the terminal ensures reliable communication between the automation system and connected field devices.

Powering the KL4022 is simple and flexible. It typically operates on a 24 V DC supply via power contacts, but can also function with a 15 V DC supply when used in combination with the KL9515 power supply terminal. This flexibility allows the KL4022 to adapt to different installation environments and system requirements without additional complexity.

As part of Beckhoff’s Bus Terminal platform, the KL4022 integrates seamlessly into modular control systems, enabling efficient scalability. The platform’s modular approach allows engineers to mix and match digital, analogue, and specialised terminals, tailoring the I/O configuration to suit project-specific demands. Its compact housing saves cabinet space while still providing dual-channel functionality, contributing to cost-effective and streamlined designs.

In real-world use, the KL4022 is ideal for industries where precise analogue control is essential. In process automation, it can provide current-loop signals to regulate flow valves or temperature controllers. In machinery, it can deliver setpoints to variable-speed drives or proportional actuators. Across diverse applications, its combination of precision, stability, and flexibility ensures reliable system performance.

In summary, the Beckhoff KL4022 Bus Terminal is a powerful tool for generating accurate and reliable 4…20 mA analogue signals. With dual channels, high resolution, low error margins, and robust load capability, it supports a wide range of control tasks, helping engineers achieve efficient and precise automation solutions.