Beckhoff KL9050 K-bus extension terminal

The Beckhoff KL9050 is a K-bus extension terminal designed to extend internal Bus Terminal backplanes across multi-rack control configurations. Mounted at the end of a primary Bus Terminal block (replacing the standard KL9010 end terminal), the KL9050 connects via standard RJ45 patch cable to a secondary KL9020 extension coupler, enabling logical expansion of the internal K-bus across separate DIN rails up to 5 meters away without needing additional fieldbus couplers.

Key Features & Technical Specifications

• Brand: Beckhoff Automation

• Model: KL9050

• Component Type: K-Bus Extension Terminal (End Terminal Replacement)

• Connection Port: 1 x RJ45 socket

• Transmission Medium: Screened Ethernet cable (CAT5 or higher, max distance 5 meters)

• K-Bus Expansion Capacity: Up to 3 expansion sub-racks (via cascading setup)

• Current Supply: Passes internal K-bus signals and diagnostic feedback to the fieldbus coupler

• Housing Width: 12 mm compact DIN rail mounting profile

• Diagnostics: Status LEDs for communication state and voltage monitoring

Key Advantages for Control Panel Builders

• Multi-Tier DIN Rail Layouts: Enables clean, multi-row terminal block organization inside control cabinets without paying for extra fieldbus coupler units.

• Transparent System Integration: The higher-level fieldbus coupler or IPC reads all connected expansion terminals across the K-bus extension seamlessly as a single contiguous I/O rack.

• Plug-and-Play Interconnect: Uses standard shielded RJ45 network cabling for straightforward, tool-free inter-rack connections.

• Cost-Effective System Architecture: Drastically lowers hardware expenses for large I/O node counts by sharing a single primary fieldbus coupler (e.g., BK1120, BK3120, or BK9000).