National Instruments NI 9403 32-Channel TTL Digital Input-Output C-Series Module

New Unused National Instruments NI 9425 32-Ch 24 V Sinking Digital Input

National Instruments NI 9421 8-Channel 24V Sinking Digital Input DSUB

National Instruments NI 9474 8-Channel 24V High Speed Sourcing Digital Output

National Instruments NI 9401 8-Channel TTL High Speed Digital Input/Output

National Instruments NI 9421 8-Channel 24V Sinking Digital Input

National Instruments NI 9375 DSUB 16-Channel 24V Digital Input / Output

National Instruments NI 9422 8-Channel 24V Sinking/Sourcing Digital Input