4-Channel LVDT/RVDT Interface Boards from UEI

By DE Editors

United Electronic Industries (UEI; Walpole,  MA) released the DNx-AI-254 LVDT/RVDT interface boards, which are available in two models — one for use with UEI’s PowerDNA Cube and another for rack-mounting in a PowerDNR RACKtangle chassis.

Multiple operating modes ensure compatibility with all standard sensor wiring and excitation configurations, making the boards suitable for a range of linear and rotational motion applications. Each board has four fully isolated, LVDT / RVDT channels with independent A/D converters, and each channel offers 16-bit resolution, 0.1 percent accuracy, and scan rates up to 500Hz.

A key feature of the new boards is the ability to operate either as an LVDT/RVDT input interface or as a simulation output device — on a per-channel basis. Each of the four channels can be configured either as an LVDT/RVDT input interface with either internal or external excitation, or as an LVDT/RVDT simulator output with external excitation. Each simulated output can be used as a software-controlled input stimulus for an avionics test system or flight simulator.

Each channel may be configured to output a 100 to 5kHz programmable excitation voltage to the primary of an LVDT/RVDT device or alternatively as the simulated output voltage from the secondary of an LVDT/RVDT. In simulator mode, the board uses a software-defined value as the position input for a simulated device.

The DNx-AI-254 is fully supported by UEI’s comprehensive software suite, which includes factory-written support for all popular operating systems (e.g.,  Windows, Linux, VxWorks), programming languages (C, C#, and VB .NET) and application packages (LabVIEW, MATLAB, and DasyLAB).

The DNA-AI-254 (for Cube-based systems, is $2800 starting 9/15/08), and the DNR-AI-254 (for RACKtangle systems is $2950 starting 9/15/08).

For details, contact UEI.

Sources:  Press materials received from the company and additional information gleaned from the company’s website.