The Beckhoff KL3454 is a 4-channel analog input Bus Terminal designed for precise and efficient acquisition of current signals in the 4…20 mA range. Widely used across industrial automation, the 4…20 mA current loop standard provides a robust and noise-immune method of transmitting process values. By supporting this signal type, the KL3454 ensures compatibility with a broad array of field devices such as pressure sensors, flow meters, transmitters, and other process instrumentation.

Each of the four input channels is single-ended, allowing the terminal to capture multiple current loop signals simultaneously. This multi-channel capability reduces the need for separate modules, minimising both wiring complexity and control cabinet space requirements. It is particularly valuable in process industries where large numbers of analog signals must be acquired efficiently.

The KL3454 delivers high precision with its 12-bit resolution, enabling accurate representation of measured signals. With a typical measurement uncertainty of less than ±0.3% relative to the full-scale value, it ensures dependable performance in applications where process quality and operational safety rely on reliable data. This makes it well suited for tasks such as closed-loop regulation, process monitoring, and energy management.

Speed is another defining attribute of the KL3454. With a conversion time of approximately 2 ms per channel, it can track dynamic signals and provide near real-time updates to the control system. This responsiveness is important in fast-changing processes such as dosing, packaging, or machine control, where delayed measurements could compromise performance or safety.

The input circuitry is designed with an internal resistance of less than 85 Ω, optimised for current loop measurements. This ensures proper functioning of 4…20 mA loops without distorting the signal or imposing unnecessary load on the sensor circuit.

Powered directly through the K-bus, the KL3454 integrates seamlessly into Beckhoff’s modular I/O system. It communicates measurement data to the higher-level controller via the K-bus, ensuring efficient and straightforward integration with other terminals. As part of the modular platform, it can be combined with digital, analog, and specialty terminals to create a tailored I/O configuration suited to any automation project.

The compact housing of the KL3454 further enhances its practicality, conserving DIN rail space in control cabinets. By consolidating four inputs in one module, it reduces system costs while improving scalability. Its modularity also supports easy system expansion, allowing engineers to adapt installations as process requirements evolve.

In summary, the Beckhoff KL3454 is a reliable, high-precision analog input terminal designed for acquiring 4…20 mA signals across four channels. With its 12-bit resolution, fast 2 ms conversion time, low internal resistance, and seamless integration into the Bus Terminal system, it provides dependable performance for process control, monitoring, and automation. Compact, accurate, and efficient, the KL3454 is an essential building block for modern industrial automation solutions.