Beckhoff CU1128-1005 8-Port EtherCAT Junction Module
Beckhoff · Industrial Automation & Electrical
Description The Beckhoff CU1128-1005 is an 8-port EtherCAT junction module designed to expand and organize industrial EtherCAT networks with maximum flexibility. It enables line, tree, and star network topologies while maintaining deterministic real-time communication. Supporting hot-connect functionality and distributed clocks, the module is ideal for complex automation and motion control applications. Technical Specifications Condition New/Never Used Surplus Brand Beckhoff Category Industrial Networking Part Number CU1128-1005 Subcategory EtherCAT Junction Modules Task in System Coupling of EtherCAT junctions Transmission Medium Shielded Ethernet/EtherCAT cable (Cat.5 or higher) Bus Interface 8 × RJ45 Data Transfer Rate 100 Mbit/s Delay Approx. 1 µs per port Supply Voltage 24 VDC (18–30 VDC) Current Consumption 185 mA (typ.), 140 mA from HW version 08 Distributed Clocks Yes Mounting 35 mm DIN rail (EN 60715) Dimensions (W × H × D) 122 × 100 × 38 mm Weight Approx. 430 g Operating Temperature -25°C to +60°C (HW08), previously 0°C to +55°C Storage Temperature -40°C to +85°C Relative Humidity Up to 95%, non-condensing Protection Class IP20 Vibration/Shock Resistance EN 60068-2-6 / EN 60068-2-27 EMC Standards EN 61000-6-2 / EN 61000-6-4 Approvals CE, EAC, UKCA, cULus Information About CU1128-1005 The CU1128-1005 is a Beckhoff EtherCAT junction device that provides eight RJ45 ports for coupling EtherCAT segments in line, tree, or star topologies. It allows multiple EK1100 couplers or EtherCAT Box modules to be connected simultaneously and includes direct LED indicators for link and activity status. Operating at 100 Mbit/s, it ensures low-latency communication with delays of approximately 1 µs per port. The unit is powered by 24 VDC (18–30 VDC range) and consumes up to 185 mA, with improved efficiency from hardware version 08 onward. Its rugged industrial design includes vibration and shock resistance, EMC compliance to EN 61000-6-2/-6-4, and an IP20 protection class for installation in control cabinets. With support for distributed clocks and hot-connect functionality, the CU1128-1005 is an essential networking module for large and complex EtherCAT automation systems. Key Features: Eight RJ45 EtherCAT Ports: Connects up to eight EtherCAT network segments while supporting line, tree, and star topologies. Hot-Connect Support: Allows EtherCAT branches to be added or removed during operation without shutting down the network. Real-Time Communication: Transfers data at 100 Mbit/s with approximately 1 µs delay per port for deterministic performance. Distributed Clocks: Maintains precise synchronization between connected EtherCAT devices for motion and automation control. Wide Power Input: Operates from a 24 VDC supply with an acceptable input range of 18–30 VDC. Industrial-Grade Construction: Designed to withstand vibration, shock, and electromagnetic interference in harsh environments. Compact DIN Rail Design: Mounts easily on standard 35 mm DIN rails while minimizing cabinet space requirements. Certified Reliability: Complies with CE, EAC, UKCA, and cULus standards for industrial installations. The CU1128-1005 delivers the reliability and precision required for expanding EtherCAT networks, synchronizing distributed devices, and supporting high-performance industrial automation systems.
Brand: Beckhoff · Category: Industrial Automation & Electrical
Key features
- Eight RJ45 EtherCAT Ports: Connects up to eight EtherCAT network segments while supporting line, tree, and star topologies.
- Hot-Connect Support: Allows EtherCAT branches to be added or removed during operation without shutting down the network.
- Real-Time Communication: Transfers data at 100 Mbit/s with approximately 1 µs delay per port for deterministic performance.
- Distributed Clocks: Maintains precise synchronization between connected EtherCAT devices for motion and automation control.
- Wide Power Input: Operates from a 24 VDC supply with an acceptable input range of 18–30 VDC.
- Industrial-Grade Construction: Designed to withstand vibration, shock, and electromagnetic interference in harsh environments.
- Compact DIN Rail Design: Mounts easily on standard 35 mm DIN rails while minimizing cabinet space requirements.
- Certified Reliability: Complies with CE, EAC, UKCA, and cULus standards for industrial installations.
Specifications
| Manufacturer part number | CU1128-1005 |
|---|---|
| Condition | New/Never Used Surplus |
| Brand | Beckhoff |
| Category | Industrial Networking |
| Part Number | CU1128-1005 |
| Subcategory | EtherCAT Junction Modules |
| Task in System | Coupling of EtherCAT junctions |
| Transmission Medium | Shielded Ethernet/EtherCAT cable (Cat.5 or higher) |
| Bus Interface | 8 × RJ45 |
| Data Transfer Rate | 100 Mbit/s |
| Delay | Approx. 1 µs per port |
| Supply Voltage | 24 VDC (18–30 VDC) |
| Current Consumption | 185 mA (typ.), 140 mA from HW version 08 |
| Distributed Clocks | Yes |
| Mounting | 35 mm DIN rail (EN 60715) |
| Dimensions (W × H × D) | 122 × 100 × 38 mm |
| Weight | Approx. 430 g |
| Operating Temperature | -25°C to +60°C (HW08), previously 0°C to +55°C |
| Storage Temperature | -40°C to +85°C |
| Relative Humidity | Up to 95%, non-condensing |
| Protection Class | IP20 |
| Vibration/Shock Resistance | EN 60068-2-6 / EN 60068-2-27 |
| EMC Standards | EN 61000-6-2 / EN 61000-6-4 |
| Approvals | CE, EAC, UKCA, cULus |
| Product type | EtherCAT Junction Modules |
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