National Instruments PXI-8422/4 NI Serial Interface Card, Isolated 4-Port RS232

National Instruments NI USB-6525 – Isolated Digital I/O Device / USB Interface

National Instruments PXI-8422 RS-232 Isolated module 185407D-01

National Instruments NI PXI-8430/16 RS232 Tested completed

National Instruments PCI Digital I/O Card 32 Channel #PCI-6518-NI Test completed

National Instruments PCI-6527 NI DAQ Card, Isolated Digital I/O, Relays 80usd

National Instruments NI PXI 8432/2 (RS232 Isolated) Tested completed

National Instruments PXI-6533 Interface, Digital I/O Module Test completed