National Instruments NI 9401 8CH TTL High-speed Digital Input/output Module

National Instruments 9423 8-ch 24V HS Sinking Digital Input

National Instruments NI 9401 8CH TTL High-speed Digital Input/output Module

NEW IN BOX National Instruments NI 9423 8-Ch Sinking Input C Series

National Instruments NI 9423 8-Ch 24V High Speed Sinking Digital Input Module

National Instruments NI 9421 8-Ch,Digital Input, Sinking Module Dsub

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