UEI launches 4-channel LVDT/RVDT interface board

-- Test & Measurement World, 8/26/2008 8:07:00 AM

Outfitted with four fully isolated LVDT/RVDT channels, each with its own independent A/D converter, the DNA-AI-254 and the DNR-AI-254 interface boards from United Electronic Industries (UEI) offer multiple operating modes to ensure compatibility with all standard sensor wiring and excitation configurations. Each channel of the DNA-AI-254 and DNR-AI-254 offers 16-bit resolution, 0.1 percent accuracy, and scan rates of up to 500 Hz. Suitable for a wide range of linear and rotational motion applications, the DNA-AI-254 is intended for use with the PowerDNA Cube, while the DNR-AI-254 is for rack-mounting in the PowerDNR RACKtangle chassis.

A key feature of the boards is their 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 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 can be configured to output a 100-Hz to 5-kHz 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.

Both boards work with UEI’s software suite, which includes factory-written support for all popular operating systems, such as Windows, Linux, and VxWorks; programming languages, like C, C#, and VB.NET; and application packages, including LabView, MATLAB, and DasyLAB. The DNA-AI-254 for Cube-based systems costs $2800. The DNR-AI-254 for RACKtangle systems costs $2950. Boards will be available starting September 15, 2008.