The Beckhoff KL2622 is a 2-channel relay output Bus Terminal designed for safe and reliable switching of AC and DC loads in industrial automation systems. Featuring two make contact relays, the KL2622 provides a flexible interface between low-voltage control signals and higher-voltage actuators, offering robust performance in a compact, modular form.

Each channel supports nominal voltages of up to 230 V AC or 30 V DC, making the KL2622 suitable for a wide range of field-side devices, including solenoids, contactors, signal lamps, and smaller motors. Its versatility allows engineers to handle mixed load types—ohmic, inductive, and lamp loads—without requiring additional hardware. This capability makes the module a valuable addition to automation systems where switching tasks vary by application.

The KL2622 provides a switching capacity of up to 5 A AC/DC per channel for ohmic loads, ensuring reliable operation for resistive devices such as heaters or incandescent lamps. For inductive loads, such as relays, solenoids, or coils, the module supports 2 A AC/DC per channel, ensuring robust switching while protecting relay contacts from excessive wear. This balance of performance and protection enhances service life and system reliability.

Unlike some relay terminals with shared or power contacts, the KL2622 is designed without power contacts, ensuring galvanic isolation between relay outputs and the terminal bus. This separation safeguards control electronics from disturbances on the field side, improving system robustness and meeting safety standards for industrial environments.

Compact in design, the KL2622 fits seamlessly into Beckhoff’s Bus Terminal system, offering modular expandability and space-saving integration into control cabinets. Its plug-in format enables easy connection alongside digital, analog, and specialty terminals, allowing engineers to build tailored I/O configurations while minimising wiring complexity.

Diagnostics and monitoring are supported via the TwinCAT automation software, providing real-time visibility into relay states and simplifying commissioning and maintenance. Clear relay status indication ensures operators can quickly confirm switching behaviour during operation, reducing downtime and enhancing transparency.

In practical applications, the KL2622 is used in machine control, building automation, process industries, and energy systems, where reliable switching of AC and DC loads is required. From switching lights and auxiliary devices to actuating contactors and solenoids, the KL2622 provides a flexible and dependable solution for integrating field devices into control architectures.

In summary, the Beckhoff KL2622 is a robust 2-channel relay output terminal designed for switching 230 V AC or 30 V DC loads. With a maximum switching capacity of 5 A for ohmic loads and 2 A for inductive loads, galvanic isolation, and compact Bus Terminal integration, it delivers a reliable and versatile solution for industrial automation. For engineers seeking modularity, safety, and efficiency in relay switching, the KL2622 is an excellent choice.