The Beckhoff KL2535 is a 2-channel PWM (Pulse Width Modulation) output Bus Terminal designed for the precise control of inductive loads such as valves, solenoids, and coils. With current-controlled operation, high switching performance, and robust protective features, it is an ideal solution for motion and process automation tasks requiring accurate and efficient load control.

Operating with a nominal voltage of 24 V DC (–15%/+20%), the KL2535 delivers reliable performance in standard industrial power environments. Each of its two output channels can supply up to ±1 A of current, making the module well suited for actuating a variety of inductive devices. Both channels share protection features, including short-circuit resistance and thermal overload monitoring, ensuring safe operation even under demanding conditions or wiring errors.

At the core of its functionality is the current-controlled PWM output. By regulating current rather than simply voltage, the KL2535 ensures precise and stable control of inductive loads, particularly useful when driving proportional valves or coils where exact current regulation is critical for consistent performance. The duty factor can be adjusted between 0…100%, providing full flexibility for modulating output levels to match process requirements.

The terminal operates with a PWM clock frequency of 36 kHz, offering fast switching performance. This high frequency ensures smooth control, reduces audible noise in connected loads, and enhances the responsiveness of actuated devices. With a resolution of up to 12 bits, the KL2535 provides fine signal granularity, enabling accurate control across the full duty cycle range.

To maintain system safety and reliability, the KL2535 incorporates 500 V electrical isolation between the K-bus and the field potential. This isolation prevents interference from propagating between the control and power sides, ensuring stable operation in electrically noisy industrial environments.

As part of Beckhoff’s modular Bus Terminal system, the KL2535 integrates seamlessly with digital, analog, and specialty terminals. Powered and controlled via the K-bus, it communicates output values in real time with higher-level controllers such as Bus Couplers or Embedded PCs. Its compact housing design conserves DIN rail space, supporting high-density cabinet installations and scalable system configurations.

The KL2535 is particularly valuable in applications where precise current control of inductive devices is essential. Examples include controlling hydraulic or pneumatic proportional valves in process automation, managing electromagnetic actuators in machinery, or regulating solenoids in dosing and handling systems. Its ability to combine compact form, robust protection, and accurate current-controlled PWM output makes it a versatile tool for engineers across industries.

In summary, the Beckhoff KL2535 is a reliable and efficient 2-channel PWM output terminal designed for controlling inductive loads with high precision. Offering ±1 A output capacity, 36 kHz PWM frequency, 12-bit resolution, and robust isolation, it provides dependable performance in demanding automation environments. Compact, protective, and seamlessly integrated into Beckhoff’s I/O platform, the KL2535 ensures accurate and flexible control of coils, valves, and other inductive devices.