Screw Terminal, 8x16, 2-Wire PXI Module Matrix Terminal Block—The TB-2637 provides the necessary routing to configure the PXI‑2534 PXI Matrix Switch Module as a 1-wire 8×16 matrix. You can directly connect the TB-2637 to the front panel I/O connectors of the PXI-2534. The TB-2637 includes screw terminals that provide access to the rows and columns of the matrix.