LVDT / RVDT Simulation (D/L) (D/R)

 

Module DL

The D/L modules are NAI’s latest generation LVDT/RVDT Simulation Modules. These programmable, isolated output modules used on our multifunction embedded boards and SBCs are unique, solid-state designs that operate between 47 Hz and 20 kHz.

Linear Variable Differential Transformer (LVDT) and Rotary Variable Differential Transformer (RVDT) are transformer-type voltage/current transducers that convert a linear/rotary movement of a core/shaft to a multi-wire differential AC electrical signal. Both deliver signals linearly proportional to the position of a shaft (magnetic induction core). An LVDT/RVDT simulator is used to convert digital positional commands to corresponding AC signals.

A wide variety of D/L modules cover the range of excitation voltages/frequency, include extensive field-parameter programmability, and provide a full operating envelope choice for simulating virtually any type of LVDT or RVDT. By eliminating the need for external transformers and operating with lower AC reference frequencies, these solid-state designs offer huge space savings.

There are three types of D/L modules:

  • 3-Channel Modules:

These high-density modules have a lower power output drive (0.5 VA per channel, max.). The lower power output drive is ideal for driving solid-state input instruments, gauges (most LVDT/RVDT measurement circuits are high input impedance, as "real" LVDTs/RVDTs do not supply a large amount of current).

  • 2-Channel Modules:

The 2-channel modules have a standard (1.5 VA per channel, max.).

  • Single-Channel Modules:

The single-channel modules have a high-power output drive capability (3 VA per channel, max.).

All LVDT/RVDT simulation modules feature a wrap-around self-test capability and most platforms support an optional programmable AC excitation supply. In addition to state-of-the-art technologies and design algorithms, the modules include many other useful application features such as excitation loss detection, and excitation voltage and frequency measurement. They can be programmed (and re-programmed) in the field for any excitation and simulating signal voltage between 2 - 28 Vrms or 28 - 90 Vrms full scale range. Individual excitation inputs are supplied for each A and B output pair.

All LVDT/RVDT simulation modules feature a wrap-around self-test capability and most platforms support an optional programmable AC excitation supply. Utilizing state-of-the-art technologies and design algorithms, many useful application features such as excitation voltage and frequency measurement, excitation loss detection and many others are “built-in.” They can be programmed (and re-programmed) in the field for any excitation and simulating signal voltage between 2 and 28 Vrms or 28-90 Vrms full scale range.

 

Click below for detailed function module specifications:


ModuleDescription
DLxD/L(R)VDT (Module DL*) - Three, two or one channels, 0.5 VA, 1.5VA or 3.0 VA

Function module(s) featured in products below:


ModelBoard TypeBoard ArchitectureFunction Module SlotsSizeEthernetMaster / SlaveOn Board ReferenceOther
75G53U cPCIARM / Xilinx® Zynq3 2 x GBBoth   
64G56U VMEARM / Xilinx® Zynq6 2 x GBBoth YUser application ARM processor capability
68G53U OpenVPXDual Core ARM® Cortex® A9 @ 800 MHz3 2 x GBBoth  Slot profile: SLT3-PER-1F-14.3.2 / Module profile: MOD3-PER-1F-16.3.2-2
79G5PCIe 31/2   N/A 
ModelBoard TypeProcessorFunction Module SlotsMaximum MemoryMaximum StorageVideo OptionsEthernetAvailable O/S
75ARM13U cPCI SBCXilinx® Zynq 7015 with Dual Core ARM® Cortex® A9 @ 800 MHz3512 MB DDR3L SDRAM32 GB SATAII NAND FlashN/A2 x GBWind River® Linux, VxWorks® and Xilinx® PetaLinux OS support
68ARM13U OpenVPX SBCXlilinx® Zynq 7015 & 7016 w/Dual Core ARM® Cortex®-A9 @800MHz3512 MB DDR3 SDRAM32 GB SATAII NAND FlashN/A2 x GBWind River®, VxWorks® and Xilinx® PetaLinux OS Support
75PPC13U cPCI SBCNXP® QorIQ® P2041 Quad-Core e500mc Processor @ 1.2 GHz28 GB DDR3L SDRAM32 GB SATAII NAND FlashN/A2 x GBWind River® Linux or VxWorks®
75INT23U cPCI SBCDual Core Intel® i7 3517UE @ 1.5 GHz28 GB DDR3L SDRAM32 GB SATAII NAND FlashVGA, HDMI, LVDS, or DVI2 x GBWind River® Linux or VxWorks®, Windows® Embedded Standard 7
64ARM16U VME SBCXilinx® Zynq Dual Core ARM® Cortex® A9 @ 800 MHz6 + AC Ref512 MB DDR3L SDRAM32 GB SATAII NAND FlashN/A2 x GBWind River® Linux, VxWorks® and Xilinx® PetaLinux OS support
ModelPhotoBoard TypeDimensions w/Connectors (w x h x d)Volume w/Connectors (in3)Weight / lbs (fully populated)Est. Typ. Power Dissipation (W)# of Board SlotsFunction Module SlotsMax I/O PinsEthernet
NIU1AModule6.8" x 1.7" x 2.5"28.90<1.25 to 15 WN/A1592 x GB
SIU313U cPCI4.71" x 2.35" x 8.71"96.41<5.07 to 35 W131322 x GB
SIU333U cPCI4.71" x 4.78" x 8.71"196.10<10.014 to 75 W393222 x GB
SIU353U cPCI7.13" x 4.78" x 8.71"296.85<15.025 to 100 W5155122 x GB