The Beckhoff KL2702 Bus Terminal is a compact and reliable 2-channel solid-state relay output module designed for switching both AC and DC loads in industrial automation systems. With its ability to handle voltages up to 230 V AC/DC and support steady load currents of 0.3 A per channel, the KL2702 is well-suited for applications requiring dependable switching performance and long-term durability.

Each of the two output channels is implemented as a solid-state make contact, ensuring wear-free operation compared to mechanical relays. This design eliminates issues such as contact erosion or bounce, providing consistent switching performance over millions of cycles. It is particularly advantageous in applications requiring high switching frequencies or where long service life is critical.

The KL2702 supports a steady-state load of 0.3 A per channel, while also handling peak currents of 0.5 A for up to 20 seconds and 1.5 A for up to 100 milliseconds. This makes it robust enough to manage short inrush currents typically seen when energising inductive or capacitive loads. Combined with a low contact resistance (2.1 Ω typical, 3.2 Ω max), the terminal delivers efficient operation with minimal power losses.

Switching performance is another strength of the KL2702. The module provides switch-on times between 4–6 ms, ensuring reliable activation of connected devices, while its fast switch-off times of 0.05–0.1 ms enable rapid disconnection when required. This responsiveness is valuable in time-critical automation tasks, including machine control, process regulation, and protective switching functions.

As part of Beckhoff’s Bus Terminal I/O system, the KL2702 integrates seamlessly into modular automation architectures. It can be combined with a wide range of digital, analog, and specialty terminals, enabling engineers to design highly customised systems. The outputs are controlled through the fieldbus master, with data mapped directly into the process image for straightforward programming and monitoring in Beckhoff’s TwinCAT environment.

The compact terminal format saves valuable space in control cabinets while maintaining high channel density. Its solid-state technology enhances system reliability by removing moving parts, reducing maintenance needs, and ensuring consistent operation even in harsh industrial environments.

Typical applications for the KL2702 include switching indicator lights, solenoids, contactors, or low-power actuators in machinery, process plants, and building automation. Its ability to switch both AC and DC loads makes it a flexible solution for diverse automation requirements.

In summary, the Beckhoff KL2702 Bus Terminal is a durable, fast, and efficient solid-state relay output module. With its dual channels, 230 V AC/DC switching capability, 0.3 A continuous load per channel, and rapid switching performance, it provides engineers with a compact, long-life solution for reliable load control in industrial automation systems.