Need pin out information for the TB2644 J connectors

[KLP]

The online documentation for the TB-2644 interface block used with the 2532 Switch does not show the pinouts for the output connectors J1-J4. I need this information so that I can run ribbon cables to an external user interface.

[BrowningG]

Hello KLP,

Welcome to the NI Discussion Forums!  If you search for 2644 on ni.com, you will get a link to the TB-2644 product page.  This page contains some useful information on the terminal block.  In the resources tab open the manuals link and you will see the 8 manuals associated with this device.  The NI TB-2644 Installation Instructions has the information you are looking for.  You can see the pinouts for the column and row connections on page 3 of the manual as well as some ribbon cables that will fit these connectors.  The 2644 is used for matrix expansion in the Dual 8x32 and 2-wire 8x32 matrix modes for the card.  The NI-Switches Help (installed when you install the switch driver) shows this information.  You can find this help file in Windows in the Start menu under Programs -> National Instruments - > NI-Switch -> Documentation -> NI Switches Help (the documentation folder also has the specifications sheets for each switch and terminal block supported by your version of NI-Switch).  If you go to the Devices section in the help file you will find the NI PXI-2532 listed.  There is section on the 2-Wire 8×32 Matrix Topology and the 1-Wire Dual 8×32 Matrix Topology.  If you check these you can see how each column and row is assigned to one of the connectors on the terminal block.  The terminal block installation guide will show you the ordering of the pins.  Hope this helps!