9235 & cable length

Dear all

I intend to use 8xNI 9235 module SG cDAQ-9172 chassis.

Can someone advice me

1. What is the length of cable max gauge constraint that can be supported. I have a rough estimate that it can run up to 100 meters all about

2. If you use Signal Express 2.5 or 3.0, 1000samples/sec/channel would be possible

3. the question whether the voltage is software adjustable

Sinha

  1. Longer cables lead to a degraded signal gain.  The cables themselves depend on the maximum length of your cables.  See page 13 of the manual 9245 for a discussion.  Note that longer cables are also more sensitive to noise.  Even if you can tolerate the loss of income, you may not be able to tolerate the noise.  This will depend on your cables, how they are connected and armoured and the amount of electrical noise in the region.
  2. 64 channels at 1 kHz each should be possible with SignalExpress 2.5 or 3.0.  Version 3.0 should work better, because there has been some improvements of County of grand canal plus 2.5 (and we have continued to improve for 3.5!).
  3. The excitement is a constant value (2.0V ± 1%).  It cannot be changed. See page 28 of the manual for the specifications of the excitement.

Tags: NI Products

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