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EL1262 Beckhoff

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The Beckhoff EL1262 is a digital input terminal from the EL EtherCAT Terminals series. It supports an array package data type and state array input data storage. The terminal features a maximum oversampling rate of 1000x with a microcycle time of 1 microsecond.

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Product Description:

The EL1262 is a compact digital acquisition terminal manufactured by Beckhoff within the EL EtherCAT Terminals series. It connects directly to an EtherCAT I/O strand and provides two high-speed channels for reading machine sensors or switch states. By converting external 24 V DC signals into data for the controller, the terminal shortens wiring runs and supports synchronous sampling aligned with the motion or PLC cycle. In an automation cell, this capability can timestamp limit-switch edges, register product positions, or monitor machine interlocks without requiring a separate fieldbus gateway.

The unit is classified as a digital input terminal, and its circuit boards use an array package that groups the input sections within one compact housing. Each captured input value is written to a state array, allowing the controller to read both channels through a unified data structure and reducing mapping overhead. The transfer of these values is synchronized with the network’s bus cycle, providing deterministic latency alongside other EtherCAT nodes. Internally, the terminal updates each channel every 1 µs, allowing it to detect short actuator pulses and rapid sensor transitions. This fast update rate is useful for applications in which signal changes may occur several times during a normal PLC scan.

For applications requiring finer timing resolution, the circuitry supports an oversampling factor of up to 1000x. One logical sample returned to the PLC can therefore contain a sequence of equally spaced subsamples recorded by the terminal during a single communication interval. The feature is activated through oversampling mode, which enables edge detection at intervals shorter than the standard network period while preserving the timing relationship between acquired values. Data can be displayed in Scope View, allowing rapid input transitions to be examined alongside drive currents, motion paths, or process alarms. The synchronized records help users compare sensor activity with machine movement and identify the precise sequence of events during automated operation.

Data Package Type
Array Package
Device Type
Digital Input Terminal
Input Data Storage
State Array
Max Oversampling
1000x
Microcycle Time
1 µs
Sampling Mode
Oversampling
Scopeview Support
All Revisions
Transfer Basis
Bus Cycle

Frequently Asked Questions about EL1262:

Q: How does the EL1262 handle signal timing for synchronized system control?

A: The EL1262 EtherCAT Terminal uses distributed clock synchronization to achieve precise time alignment. It maintains a distributed clock precision well below 1 microsecond for system-wide timing accuracy.

Q: What sampling capabilities enable the EL1262 to capture fast digital inputs?

A: This terminal supports sampling rates up to 1 million samples per second. It also uses oversampling with configurable factors from 1 to 1000 for enhanced signal resolution and accuracy.

Q: How does the EL1262 ensure minimal input delay in high-speed applications?

A: The EL1262 features extremely low input delay combined with XFC technology for fast and precise signal acquisition. Input filtering time is typically less than 1 microsecond to minimize latency.

Q: What voltage ranges does the EL1262 support for binary signal detection?

A: The EL1262 accepts “0” signals between minus 3 and plus 5 volts. For “1” signals it supports voltages from 11 to 30 volts, compliant with EN 61131-2 type 3 standards.

Q: How does the EL1262 manage power consumption while maintaining performance?

A: The device draws a typical input current of 3 milliamps per channel. It consumes about 20 milliamps plus load through power contacts ensuring efficient power usage.


Internal Product Review

  • ‘‘The EL1262 is a Beckhoff digital input terminal built for demanding EtherCAT input applications. Oversampling operation and 1000x max oversampling give the EL1262 excellent resolution for capturing fast signal changes. A 1 µs microcycle time is a standout advantage for precise, deterministic acquisition.’’

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