BECKHOFF

Beckhoff EL2521-0024 EtherCAT Terminal 1-Channel Pulse Train Output Module

SKU EL2521-0024

In stock
  • 12-month warranty
  • Free returns within 30 days
  • Manufacturer: BECKHOFF

  • Product No.: EL2521-0024

  • Country of origin:Germany

  • Product Type: EtherCAT Terminals

  • Payment: T/T, Western Union

  • Weight: 2000g

  • Dimensions: 12 mm x 100 mm x 68 mm

  • Shipping port: Xiamen

  • Warranty: 12 months

Description

Directly integrating into the EtherCAT I/O framework, the Beckhoff EL2521-0024 delivers 1-channel pulse train output capabilities optimized for incremental encoder simulation. Operating at a signal voltage of 24 V DC with a 1 A maximum output current, this terminal converts 16-bit velocity or position commands from the controller into precise physical frequency signals. It is ideal for testing PLC positioning tasks, regulating stepper motor drives, and performing dynamic frequency synthesis in high-speed industrial networks.

Key Features

  • High-Frequency Performance: Supports base output frequencies from 0 to 500 kHz (defaulting to 50 kHz) with highly precise 10 mHz step-size increments.
  • Dual Differential Outputs: Provides two differential outputs (Channels A and B) alongside two dedicated digital inputs (+T and +Z) for system synchronization.
  • Distributed Clocks Integration: Features integrated EtherCAT distributed clocks (DC) to ensure exact microsecond-level synchronization across the network.
  • Comprehensive Signal Simulation: Configurable modes including ramp functions, travel distance control, and manual frequency overriding.

Applications

  • Interfacing with external stepper motor power stages and pulse-controlled servo drives.
  • Simulating incremental encoder feedback for closed-loop hardware-in-the-loop (HIL) testing systems.
  • Dynamic frequency generation and reference pulse transmission in complex printing or packaging lines.

Technical Specifications

Manufacturer Beckhoff Automation
Model Number EL2521-0024
Connection Technology Pulse train (frequency output)
Number of Channels 1 channel (2 differential outputs A, B)
Integrated Inputs 2 inputs (+T, +Z) at 24 V DC
Output Signal Range 5 to 24 V DC (externally supplied, 1 A max.)
Output Frequency Range 0 to 500 kHz (50 kHz default)
Resolution Max. 15 bit (16 bit + sign)
Step Size 10 mHz
E-bus Current Consumption Typical 280 mA (load-dependent)
Electrical Isolation 500 V (E-bus / field potential)
Process Image Width 14-byte output, 8-byte input
Device Dimensions (W x H x D) 12 mm x 100 mm x 68 mm
Physical Weight 50 g
Shipping Weight (Calculated) 2.0 kg
Operating Temperature 0 to 55 degC
Storage Temperature -25 to 85 degC
Relative Humidity 95%, non-condensing
Environmental Ratings IP20 protection, CE, UL, ATEX (II 3 G Ex nA IIC T4 Gc)

Connection and Wiring Parameters

Conductor Type Cross-Section Range AWG Range
Solid Wire (s) 0.08 to 2.5 mm² AWG 28 to 14
Stranded Wire (st) 0.08 to 2.5 mm² AWG 28 to 14
Wire with Ferrule (f) 0.14 to 1.5 mm² AWG 26 to 16

Alternative Models & Compatibility

The EL2521-0024 is highly specialized compared to the standard EL2521 model. While the standard EL2521 utilizes a lower output stage voltage, the -0024 variant natively supports up to 24 V DC at 1 A. This makes it an ideal drop-in solution for legacy systems requiring direct 24 V actuator lines without additional signal-level shifting hardware.

Application Pitfalls & Engineering Notes

At 280 mA typical E-bus current draw, this terminal exerts a substantial electrical load on the local bus segment. Systems utilizing multiple pulse train cards must verify the power budget of the upstream EtherCAT Coupler. If the calculated current consumption exceeds the coupler’s supply capacity, an EL9410 power supply terminal must be integrated immediately upstream of this module.

Commissioning & Wiring Tips

To prevent high-frequency noise injection into neighboring analog signals, always route the pulse output connections via shielded, twisted-pair cabling. Terminate the shield securely to the mounting plate using low-impedance grounding clamps. Strip wire jackets exactly 8 to 9 mm prior to insertion into the spring-cage terminals to prevent exposed conductors from creating short-circuits.

Installation Guidelines

CRITICAL WARNING: ELECTRICAL HAZARD

Before mounting, removing, or wiring any EtherCAT terminal, de-energize the entire control system. Ensure that both the primary power supply to the bus coupler and all field-side 24 V DC power contacts are completely disconnected to prevent internal terminal destruction, system communications faults, or personnel injury.

1
Position the EL2521-0024 terminal on the 35 mm DIN rail (conforming to EN 60715) alongside the upstream EtherCAT coupler or terminal.
2
Firmly press the terminal downward until the metallic locking mechanism clicks onto the rail, and sliding tongues lock with the adjacent modules.
3
Using a flat-blade screwdriver, actuate the integrated tension clamp terminals and insert pre-stripped solid or ferruled wiring. Release the clamp to secure the contact.
4
Apply field power and configure process data maps via Beckhoff TwinCAT System Manager software.

FAQ

What is the primary function of the Beckhoff EL2521-0024?

The EL2521-0024 functions as a 1-channel pulse train output terminal designed for high-precision incremental encoder simulation and frequency generation within an EtherCAT industrial network.

How does the EL2521-0024 model differ from the standard EL2521?

While the standard EL2521 operates at low signal voltages, the -0024 variant natively supports an output specification of 5 to 24 V DC with a 1 A maximum output current, allowing direct integration with 24 V field actuators.

What should be monitored regarding E-bus power when using this module?

The module has a typical E-bus current consumption of 280 mA. If you assemble multiple modules on a single coupler, ensure the total current does not exceed the coupler's supply limit; install an EL9410 power terminal if necessary.

What output frequencies are supported by this EtherCAT terminal?

The EL2521-0024 supports an output frequency range of 0 to 500 kHz, with a default base frequency of 50 kHz, configurable with a step size of 10 mHz.

View all FAQs →

Quantity
Shipping & Returns

Global Express Shipping

  • Standard Delivery: 4–6 business days via DHL, FedEx, and UPS.
  • Express Dispatch: Same-day dispatch for in-stock orders placed before 2:00 PM (GMT+8).
  • Worldwide Coverage: Serving over 150 countries.

Returns & Warranty

  • 30-Day Guarantee: Returns accepted for in-stock products in original, factory-sealed packaging.
  • 12-Month Warranty: Every industrial component is backed by our technical warranty.
Reviews
1 of 1
Only 10 item(s) left in stock
Quantity
View full details

Global Express Shipping

  • Standard Delivery: 4-6 Business Days via DHL, FedEx, and UPS.
  • Express Dispatch: Same-day dispatch for in-stock orders placed before 2:00 PM (GMT+8).
  • Worldwide Coverage: Serving over 150 countries, including rapid delivery to Saudi Arabia and UAE.

Returns & Warranty

  • 30-Day Guarantee: Returns accepted for in-stock products in original, factory-sealed packaging.
  • 12-Month Warranty: Every industrial component is backed by our professional technical warranty.

Orders are processed and delivered Monday-Friday (excluding public holidays).


For full eligibility, restocking fees, and international return details, please view our official Refund & Return Policy .

TECHNICAL SPECIFICATIONS

Country of origin
Germany

Technical knowledge

Commissioning OPC UA in KEPServerEX: A Field Checklist

A practical commissioning sequence for KEPServerEX OPC UA connections: define data ownership, test tags locally, configure endpoint and certificate trust, limit access, then verify failure recovery...

Set a PLC Commissioning Laptop IP Without Losing Access

Commissioning an Ethernet-connected PLC often starts with the laptop, not the controller. Learn how to record existing settings, choose a temporary address, test connectivity, and restore the plant...

Designing Automation for Combustible Dust Hazards

Combustible dust controls require more than alarms. Learn how to map dust generation, select instrumentation, design interlocks, handle failed feedback, test safe states, and maintain the full...

Hairpin Stators: Benefits, Limits, and Inspection

Hairpin windings raise slot fill and support compact traction motors, but conductor geometry, AC losses, insulation damage, weld quality, and cooling determine whether the design meets its targets.

Using Ansible for Controlled SCADA Server Changes

Use Ansible to standardize SCADA server changes without expanding OT risk. This guide covers inventories, idempotent playbooks, staged testing, credentials, logging, and practical rollback controls.

Securing Remote PLC Access Beyond the VPN

A VPN encrypts the path to an industrial network, but secure remote PLC work also needs identity controls, segmented access, change approval, logging, safe operating boundaries, and tested recovery...