The Beckhoff KL3408 is an 8-channel analog input Bus Terminal designed for efficient and precise measurement of voltage signals in industrial automation environments. Supporting input ranges of –10…+10 V, it enables the acquisition of both unipolar and bipolar signals, making it a versatile component for process monitoring, control systems, and machine diagnostics.

With eight single-ended channels integrated into a single module, the KL3408 offers a space-saving and cost-efficient solution for projects requiring multiple analog inputs. Instead of installing multiple terminals, engineers can consolidate data acquisition into one unit, simplifying wiring and reducing control cabinet complexity. This compact design makes the KL3408 particularly well suited for high-density applications or installations where panel space is limited.

The terminal delivers a resolution of 12 bits for bipolar measurements and 11 bits when operating in the 0…10 V range. This provides finely graduated measurement capability, ensuring accuracy in capturing even small voltage variations. Combined with its typical measurement uncertainty of less than ±0.3% of full scale (in line with Beckhoff’s analog input standards), the KL3408 ensures reliable data acquisition for control loops, monitoring tasks, and process optimisation.

The module offers a conversion time of approximately 4 ms per channel, enabling responsive updates that support dynamic processes. This performance ensures that rapidly changing analog signals can be tracked in near real time, which is essential for applications like packaging, dosing, or energy monitoring.

A high internal resistance of more than 130 kΩ ensures minimal loading on the connected circuits. This characteristic is particularly valuable when working with sensitive signal sources, as it prevents interference with or distortion of the original signals.

The KL3408 is powered via the K-bus, drawing a typical current of 140 mA. This eliminates the need for external power wiring while ensuring seamless integration into Beckhoff’s modular I/O system. Data from the analog inputs is transmitted directly to the higher-level controller via the K-bus, ensuring fast and straightforward communication.

Weighing approximately 75 g, the KL3408 combines durability with a compact housing. As part of Beckhoff’s Bus Terminal range, it can be combined with digital, analog, and specialty modules, allowing flexible configuration to meet specific application requirements. Its modularity supports scalability, enabling expansion as systems grow or adapt to new demands.

In summary, the Beckhoff KL3408 is a powerful and versatile analog input terminal that combines eight channels of ±10 V single-ended measurement in one compact device. With 12-bit resolution, a 4 ms conversion time, high internal resistance, and seamless integration into Beckhoff’s Bus Terminal platform, it provides reliable and efficient data acquisition for modern automation. Ideal for process control, monitoring, and machine applications, the KL3408 ensures accurate and scalable analog signal measurement in demanding industrial environments.