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High precision I/Os for measurement applications

14 June 2016

With its EL3751 EtherCAT terminal, Beckhoff believes it is able to offer high-precision I/Os for measurement applications. It is said to be capable of up to 10,000 samples per second, with a measurement accuracy of ±0.01% and 24 bit resolution, even in demanding applications.

The integrated EL3751 solution combines automation and measurement technology with a single hardware and software platform. The EL3751 1-channel EtherCAT Terminal for analogue measurement technology combines high measurement accuracy – ±0.01 % of the full scale value for most interfaces, at 25 °C (±5 °C) – with a high sampling rate of up to 10,000 samples per second and 24 bit resolution (incl. sign). The XFC technology (eXtreme Fast Control) functions are also available in the EL3751. Optionally, the measured data can be transmitted to higher-level automation devices with oversampling. The integrated distributed clocks ensure precisely synchronised sampling across the EtherCAT system.

The Extended Range allows for effective measurement beyond the nominal measuring range, with possible extension up to 107%. To suppress aliasing effects, the input channel features two configurable numeric software filters up to 39th order FIR / 6th order IIR. The filters can be preselected or freely defined, so that a band stop or a band pass can be implemented.

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