DNx-AI-256 – 2-Channel Synchro/Resolver/LVDT/RVDT Interface

2-Channel Synchro/Resolver/LVDT/RVDT Interface


The DNx-AI-256 are high performance, two channel Synchro/Resolver input and output boards for UEI’s powerful I/O chassis. The 256 series boards are functionally similar to the DNx-AI-255 but provide significantly more output drive for applications that require it. The DNx-AI-256 series is also an ideal solution for simulating LVDT/RVDTs. The board may be configured as two inputs, two outputs, or one input and one output.



  • DNA-AI-256 for use with “Cube” I/O chassis
  • DNR-AI-256 for use with RACKtangle I/O chassis (requires two slots in the RACKtangle)
  • 2 input / output channels
  • 16-bit resolution
  • 3-wire (Synchro) and 4-wire (Resolver) inputs
  • 4, 5 and 6-wire LVDT/RVDT support
  • Reference output per channel
  • 5 to 18 Vrms programmable reference
  • 50 Hz to 10 kHz
  • Up to 2.4 VA without external buffer

The DNR-AI-256 also provides two channels of synchro or resolver output that are ideal for driving such items as attitude indicators or as a test source for a wide variety of synchro or resolver input devices. The outputs each accept an independent reference signal and offer 16-bit output resolution. Each channel will drive up to 19.8 Vrms at 3.0 VA (total board output must be less than or equal to 5 VA) without external buffering.

The current consumed by each output channel may be monitored and used to confirm the wiring is correct and the coils of the synchro/resolver or RVDT/LVDT are as expected.

With the high power output of the DNR-AI-256, a fan unit should be placed in the slot next to it to prevent overheating. The fan unit, DNR-FAN-925, comes with the purchase of the AI-256.
Software for the DNR-AI-256 is provided as part of the UEI Framework. The framework provides a comprehensive yet easy to use API that supports all popular Windows programming languages and applications including LabVIEW, MATLAB/Simulink, and any application supporting ActiveX or OPC servers.

I/O Chassis
Model No.


RACKtangle ®


For DAQ chassis options, click here.