Logic Conventions - National Instruments NI 6238 User Manual

P1.VCC
P1.0
P1.GND
P1.1
P1.GND
P0.0
P0.GND
Caution Exceeding the maximum input voltage or maximum working voltage ratings,
which are listed in the NI 6238/6239 Specifications, can damage the DAQ device and the
computer. NI is not liable for any damage resulting from such signal connections.

Logic Conventions

© National Instruments Corporation
Buffer
P1.<0..3>
Figure 6-2. NI 6239 Digital I/O Connections (DO Sink)
With NI 6238/6239 devices, logic "0" means that the Darlington output
switch is open, while logic "1" means closed. Table 6-1 summarizes the
expected behavior.
Digital
Isolators
P1.GND
P0.GND
6-3
Chapter 6 Digital Input and Output
NI 6238/6239 User Manual