The Beckhoff KL3112 Bus Terminal is a high-performance analog input module engineered for the acquisition of standard 0…20 mA process signals. With two differential input channels and 16-bit resolution, it provides accurate and reliable signal capture for a wide range of industrial automation tasks, from process monitoring to machine control.

Each of the KL3112’s two channels is designed for differential measurement, offering enhanced noise immunity and signal integrity compared to single-ended inputs. This makes it particularly suitable for environments with strong electromagnetic interference or when long cable runs are required. The module is capable of withstanding common-mode voltages of up to 35 V, ensuring stable operation even under demanding electrical conditions.

The terminal features an internal resistance of approximately 50 Ω (shunt), with a load capacity of 60 Ω plus diode voltage, ensuring precise current measurement without significant signal distortion. This robust design guarantees compatibility with standard industrial 0…20 mA transmitters, which are widely used for variables such as pressure, flow, temperature, and level.

One of the key advantages of the KL3112 is its flexible conversion time. By default, it operates at 140 ms, providing smooth and stable measurement suitable for slow-changing process signals. However, the conversion time can be configured down to 2 ms, allowing the module to capture fast-changing currents with high responsiveness. This adaptability makes the KL3112 equally effective in both process automation and dynamic machine applications.

The terminal draws its electronic power supply via the K-bus, simplifying integration into Beckhoff’s modular I/O system. With its compact housing, the KL3112 saves cabinet space while offering high-resolution measurement capability. It can be combined seamlessly with digital, analog, or communication terminals, enabling tailored system configurations to meet diverse project requirements.

Practical applications of the KL3112 include monitoring analog signals from field devices such as transmitters, sensors, and converters. In process industries, it can capture flow or pressure readings; in machine automation, it can acquire feedback signals from actuators or condition-monitoring devices. Its accuracy and flexibility make it a dependable choice for applications requiring both precision and adaptability.

In summary, the Beckhoff KL3112 Bus Terminal is a robust and versatile analog input module for acquiring 0…20 mA signals. With two differential channels, 16-bit resolution, configurable conversion speeds, and excellent noise immunity, it offers engineers a powerful tool for integrating accurate current measurements into Beckhoff’s modular automation platform.