Beckhoff EK1122 2-Port EtherCAT Junction Terminal

The Beckhoff EK1122 is a 2-port EtherCAT junction terminal designed to extend pure linear EtherCAT line topologies into versatile star, tree, or drop-line network structures. Installed directly within an EtherCAT Terminal segment, the EK1122 converts the internal E-bus signal to two 100BASE-TX EtherCAT RJ45 ports (X1 and X2), enabling easy connection of additional fieldbus lines, remote EtherCAT sub-racks, or independent machine modules.

Key Features & Technical Specifications

• Brand: Beckhoff Automation

• Model: EK1122

• Component Type: 2-Port EtherCAT Junction / Branch Terminal

• Ports: 2 x RJ45 (100 Mbit/s, 100BASE-TX)

• Bus Interface: Internal E-bus (EtherCAT Terminal segment)

• Transfer Medium: Shielded Ethernet cable (CAT5/CAT5e or higher, up to 100 meters between nodes)

• Status LEDs: Link and Activity LEDs for both RJ45 ports + Run LED

• Electrical Isolation: 500 V (E-bus / Ethernet signals)

• Current Consumption from E-bus: Typically 130 mA

• Housing Width: 12 mm compact DIN rail mounting design

Key Advantages for Network Topology & Architecture

• Flexible Network Branching: Eliminates linear daisy-chain constraints by allowing machine builders to branch off to remote operator panels, robot tools, or separate cabinet enclosures.

• Hot Connect Capability: Supports EtherCAT Hot Connect configurations, allowing modular machine parts or tool changers to be attached and detached during active operation without stopping the primary controller.

• Seamless E-bus Conversion: Transparently routes frame traffic between internal terminal E-bus backplane signals and external Ethernet physical layers.

• Compact Integration: Occupies only 12 mm of space on the standard 35 mm DIN rail inside the terminal block assembly.