National Instruments NI 9411 6-Channel 24V Differential or TTL Digital Input

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

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

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

National Instruments NI-9411 USED 100%TESTED

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

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

National Instruments NI 9425 32-Channel 24V Sinking Digital Input