Configuring Control Signal Inputs for SET-1240 xVDT Emulator Card in NI SLSC System

Updated Jan 31, 2023

Reported In

Hardware

  • Chassis for SLSC

Other

  • SET-1240 xVDT Emulator Card

Issue Details

I am using an SET-1240 xVDT Emulator Card in my SLSC system to simulate LVDT sensors. I see that for each emulator channel, there are two control signals that control the independent A and B outputs for the simulated sensor. What type of signal is expected for the control inputs and how does the control value affect the outputs?

Solution

The SET-1240 expects a DC voltage between -10 V and +10 V. The ratio of the control signal voltage divided by 10 will be the gain that is applied to the excitation signal. Positive control voltages will result in an output signal that is in phase with the excitation signal, and negative control voltages will result in an output signal that is 180° out of phase with the excitation signal.

Here is a chart with some examples of control signal inputs and the corresponding outputs:
 
Control SignalGainOutput Signal
10 V1.0100% amplitude of excitation
5 V0.550% amplitude of excitation
0 V00% amplitude of excitation
-5 V-0.550% amplitude of excitation, 180° out of phase
-10 V-1.0100% amplitude of excitation, 180° out of phase

Additional Information

Control signals can be generated using a PXIe-6738 or PXIe-6739 Analog Output Module in NI VeriStand.

Related Links

SET-1240 Technical Description

Other Support Options

Ask the NI Community

Collaborate with other users in our discussion forums



Request Support from an Engineer

A valid service agreement or active software subscription may be required, and support options vary by country.