Procurement managers rarely finalize EK1521 without reviewing Beckhoff Ek1110 0008, Beckhoff Ek1122 and Beckhoff Ek1100, ensuring that the chosen component meets budget, compliance, and delivery conditions.
EK1521 - Beckhoff EtherCAT Coupler
Beckhoff EK1521 EtherCAT Coupler integrates EtherCAT Terminals into automation networks using multi-mode fiber, enabling reliable long-distance data transfer in industrial systems.
| Brand | Beckhoff |
| Product Type | EtherCAT Coupler |
| Product | EK1521 |
EK1521 Beckhoff EtherCAT Coupler Technical Specifications
| Specification | Value |
|---|---|
| Task within EtherCAT system | coupling of EtherCAT junctions via multi-mode glass fiber |
| Data transfer medium | multi-mode glass fiber 50/125 µm (MM) |
| Distance between stations | max. 2000 m (100BASE-FX) |
| Protocol | EtherCAT |
| Delay | approx. 1 µs |
| Data transfer rates | 100 Mbit/s |
| Bus interface | 1 x SC Duplex |
| Power supply | from E-bus |
| Current supply E-bus | typ. 350 mA |
| Operating temperature | -25…+60°C |
| Storage temperature | -40…+85°C |
| EMC immunity/emission | conforms to EN 61000-6-2/EN 61000-6-4 |
| Relative humidity | 95%, no condensation |
| Vibration/shock resistance | conforms to EN 60068-2-6/EN 60068-2-27 |
| Protect. rating/installation pos. | IP20/variable |
| Approvals/markings | CE, CCC, UL, ATEX, IECEx |
| Ex marking | ATEX: II 3 G Ex ec IIC T4 Gc IECEx: Ex ec IIC T4 Gc |
| Weight | approx. 65Â g |
The Beckhoff EK1521 EtherCAT Coupler is designed for efficient coupling of EtherCAT Terminals via multi-mode glass fiber. Supporting 50/125 µm cables, it achieves communication over distances up to 2000 m with 100BASE-FX technology. With a transfer rate of 100 Mbit/s and a delay of just 1 µs, this model delivers high-performance networking for real-time control systems. It uses a single SC Duplex interface and draws its power supply directly from the E-bus, ensuring compact installation without additional wiring overhead.
The EK1521 is engineered for tough operating conditions, functioning reliably between -25°C and +60°C and withstanding vibration and shock as per EN 60068-2 standards. EMC compliance with EN 61000-6-2/6-4 ensures stable operation in environments with high electrical noise. It provides a typical E-bus supply of 350 mA, offering consistent support for connected modules. At just 65 g, the lightweight IP20-rated unit is easy to handle and install. Safety and certification are guaranteed through CE, UL, CCC, ATEX, and IECEx approvals, with explosion-proof marking for hazardous zones, making it suitable for a wide range of industries.
Applications of the Beckhoff EK1521 EtherCAT Coupler include large-scale automation projects where long-distance, high-speed communication is critical. This includes process plants, material handling systems, and infrastructure automation where copper cabling is insufficient. Its ability to extend EtherCAT Terminals up to 2 km with dependable performance makes it a trusted choice for engineers looking to enhance system flexibility, scalability, and reliability in demanding industrial networks.
