National Instruments PXI-2533 Switch Module, 4x64 Matrix

National Instruments NI PXI-2532 512-Crosspoint, PXI Matrix Switch Module

National Instruments PXI-2529 Matrix Switch Module 189688-01L

^ National Instruments NI PXI-8432/4 RS-232 Isolated Module #X4052 new in box

National Instruments NI PXI-2530B 128-Channel Multiplexer / Matrix & TB-2631B

National Instruments NI PXI-2503 PXI Electromechanical Multiplexer Switch Module

National Instruments NI PXI-2594 2.5GHz 4X1 50Ω Multiplexer Module Untested

^ National Instruments NI PXI-8432/4 RS-232 Isolated Module #X4052 new in box