Data Acquisition & Telemetry


Beckhoff extends its range of measurement terminals

October 2012 Data Acquisition & Telemetry

Temperature

With the EL3314-0010 EtherCAT Terminal, Beckhoff has extended its range of measurement terminals still further. This dynamic terminal integrates temperature measurement into the standard automation system so that a dedicated and separate measurement system is no longer required. The analog input terminal enables direct connection of four thermocouples. Compared with the previous EL3314, the measuring accuracy of the new EL3314-0010 has more than doubled. The terminal circuit can also operate thermocouple sensors in a 2-wire system, while a microprocessor implements linearisation over the freely selectable temperature range. Cold junction compensation is dealt with via internal, high-precision temperature measurement in the terminals. The EL3314-0010 can also deal with mV measurements.

Weighing

The new EL3356-0010 EtherCAT Terminal makes the range of Beckhoff solutions for weighing applications even more finely scalable. The high-precision and fast sampling of signal values, every 100 s with 24-bit resolution, was developed for weighing applications and for vibration measurements on moving structures. The single-channel analog input terminal enables direct connection of a resistor bridge (strain gauge) or a load cell. The terminal determines the ratio between the bridge voltage UD and the supply voltage UREF with high precision. The load value is output directly as a process value based on the settings in the terminal. High-speed, synchronous data sampling is achieved thanks to the EtherCAT distributed clock functionality.

The EtherCAT communication system, in conjunction with high-performance industrial PCs, forms the basis for integrating the measuring tasks previously handled by specialised equipment in the standard control platform. This is an advanced concept for which Beckhoff coined the term ‘Scientific Automation’.

For more information contact Kenneth McPherson, Beckhoff Automation, +27 (0)11 795 2898, k.mcpherson@beckhoff.com, www.beckhoff.co.za



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