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PCI-Express length measurement board


Acquisition of inductive displacement transducers with PCI-Express length measurement board APCIe-3701

The PCI Express length measurement board APCIe-3701 has 8 or 16 inputs for the acquisition of inductive displacement transducers (half-bridge or LVDT) with 16-bit resolution, as well as 16 optically isolated digital inputs and outputs, 24 V. For the acquisition of transducer signals, the following acquisition modes are available: Simple mode, Sequence mode (with DMA function) and Auto-refresh mode. The measurement frequency can be programmed through software. The software tool ConfigTools includes a transducer database to select the connected transducers. Furthermore, it allows you to carry out firmware updates and calibrate connected transducers. With the 12-bit timer, a time base independent from the PC clock can be defined, to synchronise operations, for example.

The board has been developed for use in the industrial environment and is equipped with numerous protective circuits, such as optical isolation (1000 V), input filters, as well as protection against overtemperature, overvoltage, fast transients (burst), electrostatic discharge and high-frequency EMI.

The digital inputs acquire external signal states and correspond to the 24 V industry standard (IEC1131-2): Logic “1“ corresponds to an input voltage = 19 V, logic “0“ corresponds to an input voltage = 14 V. Each input has a diagnostic function to detect a short-circuit or line break of the transducer. For the digital outputs, positive logic is used: Logic “1“= set output through software, logic “0“= reset output. All outputs have a common ground line.

Standard drivers for Linux, signed 64-bit drivers for Windows 8 / 7 / XP as well as samples for the compilers und software packages Microsoft VC++, Borland C++, Visual Basic, Delphi, LabVIEW and LabWindows/CVI are included in delivery. Real-time drivers for Linux and Windows as well as compilers and samples for further operating systems are available on request.

 

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