National Instruments PXI-8420 RS-232 Serial Interface Module Card 185447D-01

National Instruments PXI-8420 RS-232 Serial Interface Module Card 185447C-01

National Instruments NI PXI-GPIB Module Card

National Instruments NI PXI-8331 MXI-4 Interface Card 188535D-01

NI PXI-2564 Relay Switch Module 191950D-01L – Tested, US Seller

National Instruments PXI-2599 Dual SPDT 26.5GHz PXI RF Relay Module, 193274D-01L

(NEW) National Instruments PXI-8420 RS-232 Serial Interface Module Card

National Instruments 199198-01 PXI Slot Blocker Set of 3 D700