Screw Terminal, 4x64, 1-Wire PXI Module Matrix Terminal Block—The TB-2633 provides the necessary routing to configure the PXI-2533 PXI Matrix Switch Module as a 1-wire 4×64 matrix. You can directly connect the TB-2633 to the front panel I/O connectors of the PXI-2533. The TB-2633 includes screw terminals that provide access to the rows and columns of the matrix.