PXI-2503 in Matrix Mode does not Output to all Columns

[Ingtar]

Hello,

  Please reference the PXI-2503 Specifications located at the below web address:

http://www.ni.com/pdf/manuals/373533f.pdf

Figure 7 on sheet 7 shows multiple pins for each column 0 through 5.  So there is four column 0 outputs, four column 1 outputs, etc.  When I actually go into the Measurement and Automation explorere and connect column 0 to row 0, connect ab0 to row 0 and then apply a signal to ab0 I only see it on pins 67/33, but I do not see it on pins 59/25 or 50/16 or 40/6.  The same problem exists with all the other columns.  Is there a way to have all four column 0 outputs output the signal on row 0 at the same time?  It seems the problem might be that BC01, BC02 and BC23 need to be switched on but the GUI won't let me.  I am in a situation where I cannot change wiring (because my tester was originally wired for a different product), but would like to turn both of these on with the same signal at the same time.

Note I am using Labwindows/CVI and I'm really switching these with the DAQmxSwitchConnect command in my automated program.

[sunaenae]

Hi Ingtar,

To use the PXI-2503 as a 2-wire 4x6 matrix, you'll need the TB-2605 terminal block to properly configure the module for that topology. More information on why can be found here: http://digital.ni.com/public.nsf/allkb/ED7044BF3A70396086256DC5007219B2?OpenDocument

If you connect BC01/02/03, you'll be shorting all of the rows together, which I assume is not the functionality you want. You can look at page 4 of the specifications to see what I mean -- if you close those BC relays, then you'll be creating a multiplexer rather than a matrix. However, for reference, if you did want to do so you would just use the following API calls at the beginning of your code to make the connections: http://forums.ni.com/t5/Switch-Hardware-and-Software/2503/m-p/2498840#M2482

Let me know if that helped!

[Ingtar]

Actually, I only have an input on row 0, so I have no problem shorting the rows together.  I really just wanted all outputs to output what is on row 0, so closing relays BC01/02/03 did the trick after configuring as a 4x6 matrix.  Thanks!

[sunaenae]

Awesome, glad to help!