EL1259 BECKHOFF EtherCAT Terminal Multi-Timestamp I/O

Product Overview

The EL1259 (EL1259) is an ultra-high-speed EtherCAT Terminal that combines 8 digital inputs and 8 digital outputs in a single 12 mm HD (High Density) housing. Engineered for microsecond-precision synchronization, this module is a core component for applications requiring nanosecond-accurate signal processing, such as high-end motion control, synchronized measurement, and fast response systems. The EL1259 features "multi-timestamping" and "auto-activation" capabilities, supported by Distributed Clocks (DC). With switching times of less than 1 microsecond and a precision of << 1 microsecond, it allows for the detection and execution of signals at a resolution far beyond standard PLC cycle times, significantly reducing jitter and increasing the deterministic performance of B2B industrial machinery.

Technical Configuration

The EL1259 hardware utilizes advanced FPGA-based signal processing to achieve its sub-microsecond performance. The 8 inputs are compatible with IEC 61131-2 Type 1/3 standards, while the 8 "push" stage outputs provide 0.5 A each and are short-circuit proof. The multi-timestamping feature allows multiple signal edges to be captured or executed within a single EtherCAT communication cycle, effectively enabling sampling rates up to 100,000 edges per second. The module operates seamlessly within the EtherCAT E-bus architecture, providing 500 V electrical isolation between the bus and field potentials to ensure signal integrity and hardware protection in electrically noisy industrial environments.

Technical Specifications

Technical FAQs

What is the benefit of "Multi-Timestamping" in the EL1259?

Standard I/O modules only update their state once per PLC cycle. Multi-timestamping allows the EL1259 to record the exact time of multiple signal changes (edges) within that cycle. This allows the controller to know exactly when events occurred, regardless of the cycle time, which is critical for measuring high-speed pulses or synchronized axis positions.

How does "Auto-Activation" work for the outputs?

Auto-activation allows the output state to be changed automatically by the terminal itself at a predefined timestamp sent by the PLC. This eliminates the communication jitter between the controller and the I/O, ensuring that the physical output triggers at the exact microsecond required by the process.

Can I use the EL1259 for inductive loads?

Yes. The outputs are rated for ohmic, inductive, and lamp loads. The terminal features integrated reverse voltage protection and a breaking energy of less than 150 mJ per channel to handle the back-EMF from inductive components like small solenoid valves or high-speed relays.

Engineering & Installation Guide

• Wiring Efficiency: The EL1259 supports direct plug-in technique for solid wire conductors. For stranded wires or those with ferrules, use a small screwdriver to actuate the spring. Ensure a stripping length of 8 to 9 mm to maintain a gas-tight connection and prevent potential short circuits in the high-density 16-point contact area.

• Synchronous Mounting: For maximum precision, the EL1259 should be placed in the same EtherCAT segment as the master clock or the relevant motion axis terminals. Use the double slot and key connection to ensure the E-bus contacts are perfectly aligned, as high-speed DC synchronization is sensitive to bus communication stability.

• Thermal Consideration: Given the high switching speeds and 130 mA E-bus consumption, ensure adequate airflow in the control cabinet. While the module is rated for up to 55 Celsius, maintaining a lower ambient temperature will improve the longevity of the polycarbonate housing and the accuracy of the internal clock synchronization.