National Instruments 9401 User Manual

NI 9401 Signals
Table 1. Signal Descriptions
Signal Description
COM Common reference connection to isolated ground
DIO Digital input/output signal connection
NC No connection
Ports
The DIO channels are grouped in two ports, one containing
channels 0, 1, 2, and 3, and one containing channels 4, 5, 6, and
7. You can independently configure each digital port in software
for input or output. Note that all four channels in the port must
share the same line direction.
Connecting a Serial Peripheral Interface Device
You can connect a Serial Peripheral Interface (SPI) device to the
NI 9401.
NI 9401 Getting Started Guide | © National Instruments | 13

National Instruments 9401 Specifications

General

Brand	National Instruments
Model	9401
Category	I/O Systems
Language	English