24 digital I/O lines on the BNC-2090A rack mount.

[papapa]

Dear all,

I am using a PCI-6221 DAQ card connected to a BNC-2090A rack mount. The digital I/O sping terminal block on the rack mount is a shown in the image bellow. The PCI-6221 card has 3 ports of digital I/O with 8 lines for each port. I tested which line corresponds to which terminal and came up with the following representation shown in red, where e.g. P2-2 corresponds to Port 2 - Line 2 etc. However, it seems that Port 1 - Line 0 is not represented by any of the sping terminals.      

Is there a way to obtain an I/O on the rack mount for this particular line so that I have 24 lines available in total instead of just 23? Any suggestions would be really appreciated.

[LindsW · Accepted solution]

Hi,

I think you are correct that the PFI0 line is not represented by any of the spring terminals.  It looks instead like it's represented by a BNC Connector.  You can see that on page 2-1 of the BNC-2090A manual:

https://www.ni.com/docs/en-US/bundle/bnc-2090a-feature/resource/372101a.pdf