4204 (grounding issue) measuring device


Hi Matthew,

The PXI-4204 is a protection against overvoltages to manage up to +/-110 Volt transients.  It can measure between +/-100 volts.  My understanding of your configuration, the largest swing you could see with your configuration is 60 volts if differential measurement (if V1 were to 30 Volts and V2 to 30 Volts, say).  If your resolver of sync is more than 40 VDC above the ground data acquisition system, then the common-mode voltages can be a problem.  Otherwise, I don't think you should have a problem.  The DAQ hardware has a fairly high input impedance (2 MOhms differently) and should in no way damage the synchro resolver.

Characteristics and the PXI-4204 product manual
http://www.NI.com/PDF/manuals/373529c.PDF

Let me know if you have other questions about this or if this response was not clear.

Tags: NI Hardware

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