How do I identify conenctors on BNC-2115 (on PXI-6031E)?

[emerino]

Hi all,
   I'm fairly new at Labview. My past experience (as in: within last month) has been with serial devices.
   I now embark into working with a PXI chassis that we have.

  We have a PXI-6031E connected to a BNC-2115. How do I identify which BNC connectors are which? I looked at the manual and it doesn't seem to say much about that.

  MAX detects ports that go from ai0 to ai63 and then some others that have different names but are "something" vs 'something-else' (like _calref_vs_aignd).

  In any case, my BNC-2115 has a total of 24 BNC connectors + 2 screw-terminals. It is not labeled as the picture in the manual at http://www.ni.com/pdf/manuals/322253b.pdf

They go like this:
(from top to bottom)
first column: CH16  ~ CH21
second: CH22, CH23 then it skips to CH32 ~ CH35
third: CH 36 ~ CH39 and then jumps to CH48 and CH 49
fourth: CH50 ~ CH55

They also have other labels, but in a different order (and color) that go from PA0 to PA7, from PB0 to PB7, PC0 to PC7

Any help?

Thanks!

[jaced]

Hi Emerino,

I think that I can clear some of this up for you.

The BNC connectors actually contain two ai lines one is the center pin and the other will be the shield, in this way you are able to perform a differential measurement using one BNC connector. The reason that MAX detects ports 0-63 is your PXI-6031E has 64 ai lines, the BNC connector block however only uses 16-63. As an example we will use the top left BNC connector it is labeled CH16, this means that It’s center pin is ai channel 16 and the shield is 8+ thus it will be ai 24. The table on page 9/12 of the BNC-2115 manual has each connectors channel assignments. The jump from 23-32 can be explained by the fact that channel 16 is using channel 24 as its shield. Below is a link to the user manual
http://www.ni.com/pdf/manuals/322253b.pdf

-JaceD

[emerino]

Awesome!!  It works!

I tested by connecting a signal generator to one of the channels and was able to see the wave in MAX, under 'test panels'.

That's all I needed...thanks!!!