Number of Bus Terminals: 64
Current load: ≤ 10 A
Power LED: green
Type/number of peripheral signals: Bus Coupler dependency
Distance between stations: max. 5 m between KL9050 and KL9050
Bus interface: 2 x RJ45 socket (input + output)
Power supply: 24 V DC (-15%/+20%)

Bus Extension Capability: Enables extension of up to 64 Bus Terminals beyond the standard coupler configuration.
Flexible Station Layouts: Allows up to 5 m distance between KL9050 units, supporting decentralised cabinet or machine installations.
Robust Power Handling: Handles up to 10 A current load with a stable 24 V DC supply.
Simple Connectivity: Equipped with 2 x RJ45 sockets (input and output) for straightforward bus extension wiring.

The Beckhoff KL9050 Terminal Bus Extension Coupler Terminal is a specialised module designed to extend the reach and flexibility of Beckhoff’s modular Bus Terminal system. Acting as a coupler terminal, the KL9050 provides an efficient way to increase the number of terminals in a system while maintaining reliable communication and power distribution, making it an essential component for large-scale or decentralised automation architectures.

At its core, the KL9050 allows the connection of up to 64 additional Bus Terminals per extension, ensuring that system designers can accommodate larger I/O configurations without replacing the main Bus Coupler. For even greater flexibility, multiple KL9050 units can be linked, with a maximum distance of 5 m between extension terminals. This feature supports decentralised installation layouts, such as splitting I/O between multiple cabinets or spreading terminals across different machine sections, without sacrificing performance.

The terminal is engineered for robust power handling, supporting a current load of up to 10 A from the 24 V DC supply (–15%/+20%). This ensures reliable operation of connected terminals and field devices, even in applications with high current demand. A green power LED provides a clear indication of supply status, simplifying troubleshooting and system monitoring during installation and operation.

Connectivity is straightforward thanks to the module’s two RJ45 sockets, which serve as input and output ports for bus extension. This design ensures simple daisy-chaining between KL9050 units, minimising wiring complexity and making it easy to extend terminal stations as project requirements grow.

Importantly, the KL9050 maintains full compatibility with Bus Coupler-dependent signals, ensuring seamless integration with Beckhoff’s extensive library of digital, analogue, and specialty I/O modules. Engineers can rely on the KL9050 to preserve signal integrity and communication stability while extending the system.

As with all Beckhoff terminals, the KL9050 is compact, DIN-rail mountable, and designed for long-term durability in industrial environments. Its modular nature allows it to be combined with other Bus Terminals to create tailored distributed I/O solutions for a wide variety of applications, from factory automation to building systems.

In practice, the KL9050 is especially valuable in large machines, production lines, or building automation projects where I/O needs exceed standard coupler capacity or where distributed layouts improve accessibility and reduce wiring runs. By simplifying extension and maintaining high system reliability, it provides engineers with a cost-effective and scalable method for expanding automation systems.

In summary, the Beckhoff KL9050 Terminal Bus Extension Coupler Terminal is a robust and efficient solution for extending Bus Terminal capacity. With support for up to 64 additional terminals, decentralised installation flexibility, strong power handling, and easy RJ45 connectivity, it enables scalable, reliable, and space-efficient I/O architectures tailored to modern automation needs.