The Beckhoff KL4428 is an 8-channel analog output Bus Terminal designed to deliver high-performance current signals for industrial automation. Supporting the widely used 4…20 mA current loop standard, this module provides precise and reliable signal generation for driving actuators, control valves, indicators, and other field devices that rely on analog current input.

Each of the eight channels is configured as a single-ended current output, providing engineers with a compact solution for applications that require multiple analog outputs in one module. The 4…20 mA range is an industry-standard signal level, ensuring compatibility with a wide array of industrial devices, making the KL4428 highly versatile across process control, manufacturing, and building automation systems.

Precision is a key strength of the KL4428. With a resolution of 12 bits, the terminal is capable of generating finely graduated output signals for precise control applications. Its output error of less than ±0.2% relative to the end value guarantees accuracy and stability, ensuring that even sensitive devices receive consistent and reliable analog signals. This makes it particularly suitable for tasks where control quality directly affects process outcomes, such as in dosing systems, motion control, or precision monitoring applications.

The KL4428 is designed for robust performance in industrial environments. Each channel can drive loads of less than 150 Ω and is short-circuit proof, providing protection against wiring errors or device malfunctions. This reliability ensures minimal risk of downtime due to electrical faults and supports long-term stable operation in demanding applications.

Powering the terminal is straightforward and flexible. It is supplied with 24 V DC via the power contacts, which is standard in most automation systems. Alternatively, the KL4428 can be operated with a 15 V DC supply when paired with a KL9515 power supply terminal. This flexibility enhances its adaptability to different system architectures and project requirements.

Integration into Beckhoff’s modular I/O system is seamless. The KL4428 communicates via the K-bus with the Bus Coupler or Embedded PC, providing direct access to output data for real-time control. Its compact design, consistent with the Bus Terminal family, saves DIN rail space and supports high-density installations, making it an efficient choice for control cabinets with limited space.

In summary, the Beckhoff KL4428 is a reliable and precise analog output terminal offering eight channels of 4…20 mA current loop output in a compact module. With its 12-bit resolution, low error margin, short-circuit protection, and flexible power supply options, it provides the accuracy, durability, and ease of integration needed in modern automation environments. Whether used in process control, industrial machinery, or building automation, the KL4428 ensures stable and high-quality signal output for efficient and reliable system performance.