National Instruments NI cDAQ-9401 8 channel TTL I/O Module

National Instruments NI 9401 cDAQ Digital Input / Output Module

USED - National instruments NI-9401 NI 9401 cDAQ Digital Input / Output Module

*NEW* National Instruments NI 9401 cDAQ High Speed Digital Input / Output Module

National Instruments NI USB-6501 24-Line Digital I/O

NEW - National Instruments NI 9401 cDAQ Digital Input / Output Module