Matrix Switch, why Multiple Pins for Single Row?

[scapegoat]

I have a PXIe-2737.  It is a 4 x 64 matrix switch (2 wire).  The pinout shows four pins for each wire of each row.  example: R0+ is on pins E32, E24, E16, and E8.

As far as I can see, the 2737 has only one topology, so what is the purpose of routing a single row conductor to multiple pins?  Are they connected internally, or do I need to jumper them externally?

I have searched the documentation and the NI Switches help and can't seem to find this information.

Thanks,

-B

[marshallg · Accepted solution]

They are connected internally, you can use a DMM to validate this, there is no need to jumper them.

As far as reasoning goes, I believe the reason is so that all the rows are available on each terminal block if you the 160-Pin DIN Cable.

I personally use a 2737 and I only have one of the set of row pins connected and it works just fine.

[scapegoat]

Thanks, marshallg,

That explanation makes sense, especially after looking at the accessory you referenced. We did confirm with a continuity check.

-B