National Instruments Data Acquisition Device NI USB-621x - Manual (Page 84)

Chapter 6 Digital I/O
NI USB-621x User Manual 6-4 ni.com
Getting Started with DIO Applications in Software on
USB-6210/6211/6215/6218 Devices
You can use the USB-6210/6211/6215/6218 device in the following digital
I/O applications:
• Static digital input
• Static digital output
Note For more information about programming digital I/O applications and triggers in
software, refer to the NI-DAQmx Help or the LabVIEW Help in version 8.0 or later.
Digital I/O on USB-6212/6216 Devices
USB-6212/6216 devices contain:
• Up to 16 DIO signals (P0.<0..15>). Each signal can be individually
configured as either:
– Static digital input
– Static digital output
• 16 PFI/DIO signals (PFI <0..7>/P1.<0..7> and
PFI <8..15>/P2.<0..7>).
Each signal can be individually configured as either:
– Static digital input
– Static digital output
– PFI input
– PFI output
Each pin is called PFI x when used as a PFI; each pin is named P1.x or P2.x
when used as a digital input or output.
Figure 6-3 shows the circuitry of one DIO line. Each DIO line is similar.
The voltage input and output levels and the current drive levels of the DIO
lines are listed in the NI USB-621x Specifications.