EL2521 - Beckhoff EtherCAT Terminal
The Beckhoff EtherCAT Terminal EL2521 is a pulse train output module engineered for high-speed motion control, offering precise frequency and encoder simulation for automation tasks.
| Brand | Beckhoff |
| Product Type | EtherCAT Terminal |
| Product | EL2521 |
EL2521 Beckhoff EtherCAT Terminal Technical Specifications
| Specification | Value |
|---|---|
| Connection technology | pulse train (frequency output) |
| Distributed clocks | yes |
| Current consumption E-bus | typ. 280 mA (load-dependent) |
| Electrical isolation | 500 V (E-bus/field potential) |
| Special features | pulse output with variable frequency: frequency modulation, pulse direction specification, AB incremental encoder simulation with connection to TwinCAT NC, ramp function, travel distance control |
| Weight | approx. 50 g |
| Operating temperature | 0…55°C |
| Storage temperature | -25…+85°C |
| Relative humidity | 95%, no condensation |
| Vibration/shock resistance | conforms to EN 60068-2-6/EN 60068-2-27 |
| EMC immunity/emission | conforms to EN 61000-6-2/EN 61000-6-4 |
| Protect. rating/installation pos. | IP20/variable |
| Approvals/markings | CE, CCC, UL, ATEX, IECEx |
| Ex marking | ATEX:II 3 G Ex ec IIC T4 GcIECEx:Ex ec IIC T4 Gc |
| Housing - Design form | compact terminal housing with signal LEDs |
| Housing - Material | polycarbonate |
| Housing - Dimensions (W x H x D) | 12Â mm x 100Â mm x 68 mm |
| Housing - Installation | on 35 mm DIN rail, conforming to EN 60715 with lock |
| Housing - Side by side mounting by means of | double slot and key connection |
| Housing - Marking | labeling of the BZxxxx series |
| Housing - Wiring | solid conductor (s), flexible conductor (st) and ferrule (f): spring actuation by screwdriver |
| Housing - Connection cross-section | s*: 0.08â¦2.5 mm²,st*: 0.08â¦2.5 mm²,f*: 0.14â¦1.5 mm² |
| Housing - Connection cross-section AWG | s*: AWG28...16,st*: AWG22...16,f*: AWG26...19 |
| Housing - Stripping length | 8…9 mm |
| Housing - Current load power contacts | Imax: 10 A |
| Load type | min. 120 Ω |
| Max. output current | 0.5 A |
| Power supply | via the E-bus |
The Beckhoff EtherCAT Terminal EL2521 is designed as a pulse train frequency output module with advanced motion control functions. It supports variable frequency modulation, pulse direction specification, and AB incremental encoder simulation when integrated with TwinCAT NC. Featuring distributed clocks, the EL2521 EtherCAT Terminal ensures precise synchronization across automation networks. With 500 V electrical isolation, 0.5 A maximum output current, and 120 mA typical E-bus consumption, it delivers reliable performance while maintaining energy efficiency. The module is built in a compact polycarbonate housing with IP20 protection and is certified under CE, UL, ATEX, IECEx, and CCC, ensuring compliance with international standards.
The Beckhoff EL2521 EtherCAT Terminal is widely used in motion control systems, robotics, material handling, and packaging machinery. Its ability to simulate incremental encoders makes it highly effective for position feedback in CNC machines and servo-driven applications. Maintenance teams appreciate the straightforward wiring with spring actuation and DIN rail installation, while system integrators benefit from its seamless EtherCAT compatibility, enabling synchronized pulse generation and ramp functions for precise automation processes.
By combining advanced motion control features, durable construction, and global certifications, the Beckhoff EtherCAT Terminal EL2521 delivers trusted performance in industries such as automotive, electronics, and precision engineering. Its fast pulse output, encoder simulation capability, and reliable synchronization make it a dependable solution for high-end industrial automation.
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