IO425: LVDT/RVDT/Resolver Emulation Module

IO425

4-Channel LVDT/RVDT/Resolver Emulation Module

The IO425 I/O module is a versatile and flexible solution capable of precisely emulating variable differential transformers (VDT) and resolvers. It offers 4 channels, each of which can be configured individually for Linear Variable Differential Transformers (LVDT), Rotary Variable Differential Transformers (RVDT) or Resolvers. Each channel supports 2-, 3- or 4-wire VDT configurations, or a Resolver configuration, with independent, internal or external excitation signals.

The IO425 product family is designed to support multiple frequency ranges and is available with different voltage options, allowing you to adapt the input and output electrical requirements of your transformer.

For applications requiring more flexibility, the programmable phase delay between input and output signals can be used to introduce offsets to better replicate real sensors, and validate your device under test.

Key Features

4 independent LVDT/RVDT/Resolver channels, complete with versatile wiring configurations
Galvanic isolation between input and output
Measurement of each input frequency and amplitude
Wide operational frequency range
Internal or external excitation, with independent signal per channel
Programmable phase delay

Output characteristics
Number of channels	4 independent 2/3/4-wire LVDT/RVDT/Resolver channels
Output resolution	16 bit (degrading to 1% @ 20 kHz)
Update rate	50 kHz
Voltage range	0.45 to 31 Vrms (depending on version, see Order and Contact Information)
Voltage accuracy	< 0.2 % (0.1 % typical)
Programmable delay offset	555 ns (3.5 ms max)
In-out delay	< 20 μs
Excitation input characteristic
Frequency	300 Hz to 20 kHz
Voltage Range	0.25 to 38 Vrms (depending on version, see Order and Contact Information )
Physical
Form factor	PXI
Power requirements	12 W maximum
Connectors	50-pin male D-type connector
Environmental
Operating temperature	0ºC to +55ºC
Relative humidity	0 to 90%, non-condensing

Wiring Diagrams

Wiring schematics for VDT applications do not always use the same nomenclature. For clarity, please find below the definition that Speedgoat uses for the different (2-Wire, 3/4-Wire, Resolver) wiring configurations:

res1-1

2-wire LVDT configuration (identical for RVDT)*

res2

4-wire (left) and 3-wire (right) LVDT configurations (identical for RVDT)

res3

Wiring for resolver emulation

Item ID	Product Name	Components
2A425X*	IO425-04-0303	1x IO425 I/O module Excitation input: 1 Vrms to 7.2 Vrms Output: 1.8 Vrms to 7.7 Vrms 1x 50-pin male D-sub to 50-pin female D-sub cable (6.5 ft/2 m) 1x 50-pin D-sub terminal board Driver block library for Simulink Real-Time Comprehensive documentation and Simulink example models Installation into the real-time target machine
2B425X*	IO425-04-0404	1x IO425 I/O module Excitation input: 2.7 Vrms to 19 Vrms Output: 3.5 Vrms to 15.5 Vrms 1x 50-pin male D-sub to 50-pin female D-sub cable (6.5 ft/2 m) 1x 50-pin D-sub terminal board Driver block library for Simulink Real-Time Comprehensive documentation and Simulink example models Installation into the real-time target machine
2C425X*	IO425-04-0403	1x IO425 I/O module Excitation input: 2.7 Vrms to 19 Vrms Output: 1.8 Vrms to 7.7 Vrms 1x 50-pin male D-sub to 50-pin female D-sub cable (6.5 ft/2 m) 1x 50-pin D-sub terminal board Driver block library for Simulink Real-Time Comprehensive documentation and Simulink example models Installation into the real-time target machine

Key to X in Item ID
Please replace the X with the code number of the specific target machine into which this I/O module shall be installed:

6 = Performance real-time target machine

** Other voltage ranges are available upon request

Pricing information
We don't publish pricing information on our website. Upon request by e-mail or phone we can provide a complete price list covering our entire product portfolio in various currencies. We recommend that you get in touch with us to discuss your specific needs. We can then quickly provide you with a tailored quotation including technical and pricing information.

Included in the Delivery

I/O module installed in the real-time target machine
Cable
Terminal Board
Simulink driver blocks
Test models
Comprehensive documentation🔒

Common Applications

Rapid control prototyping
Hardware-in-the-loop (HIL) testing

Supported target machines