The Beckhoff KL4424 Bus Terminal is a versatile and compact analogue output module designed to generate standardised current signals for industrial control applications. With four independent output channels, each delivering a 4…20 mA signal, the KL4424 provides a reliable interface between control systems and actuators such as valves, drives, and positioning devices.

Engineered with 12-bit resolution, the terminal ensures smooth and precise signal generation across the entire current range. Combined with an output error of less than ±0.1% relative to the end value, it delivers the accuracy and repeatability required in demanding process automation and machine control environments. This high level of precision makes the KL4424 ideal for applications where tight process tolerances and dependable analogue output performance are essential.

The outputs are single-ended and designed to handle loads of up to 350 Ω. Each channel is short-circuit proof, ensuring robust protection and reliable operation even in the event of wiring errors or overload conditions. This design maximises system uptime and safeguards both the module and connected devices.

The power supply for the KL4424 is drawn directly from the 24 V DC power contacts, making integration into modular I/O configurations straightforward. Alternatively, the module can be supplied with 15 V DC using the KL9515 power supply terminal, providing additional flexibility in system design. This adaptability allows engineers to configure power distribution according to the specific needs of their installation.

As part of the Beckhoff Bus Terminal system, the KL4424 integrates seamlessly with a wide range of digital, analogue, and specialised terminals, enabling highly modular and scalable automation solutions. The compact form factor (only 12 mm wide) allows for high-density I/O configurations, conserving valuable space in control cabinets without compromising functionality.

Typical applications for the KL4424 include process control systems, where 4…20 mA signals are the industry standard for transmitting setpoints to actuators, machine automation tasks such as motor control or proportional valve regulation, and test and measurement setups where precise analogue current output is required. Its accuracy, robustness, and compact design make it a reliable choice for a wide range of industries, from manufacturing and energy to building automation.

In summary, the Beckhoff KL4424 Bus Terminal delivers a compact, accurate, and reliable solution for analogue current output. With four channels, 12-bit resolution, robust load capacity, flexible power supply options, and short-circuit protection, it provides engineers with a versatile and dependable interface for analogue control in modern automation systems.