National Instruments 622 Series User Manual

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Chapter 3 Connector and LED Information
PFI <8..15>/
P2.<0..7>
D GND Input or
Output
Programmable Function Interface or Port 2
Digital I/O Channels—Each of these terminals
can be individually configured as a PFI terminal or
a digital I/O terminal.
As an input, each PFI terminal can be used to
supply an external source for AI, AO, DI, and
DO timing signals or counter/timer inputs.
As a PFI output, you can route many different
internal AI, AO, DI, or DO timing signals to each
PFI terminal. You also can route the counter/timer
outputs to each PFI terminal.
As a Port 2 digital I/O signal, you can individually
configure each signal as an input or output.
Refer to the Connecting Digital I/O Signals
section of Chapter 6, Digital I/O, or to Chapter 8,
PFI. Refer to Table 7-6, 68-Pin Device Default
NI-DAQmx Counter/Timer Pins, to find the
default NI-DAQmx counter/timer pins for most
M Series devices.
USER <1,2> — — User-Defined Channels—On USB-62xx BNC
devices, the USER <1,2> BNC connectors allow
you to use a BNC connector for a digital or timing
I/O signal of your choice. The USER <1,2> BNC
connectors are internally routed to the USER
<1,2> screw terminals. Refer to the USER 1 and
USER 2 section for more information.
CHS GND — — Chassis Ground
†
—This terminal connects to the
USB-62xx BNC device metal enclosure. You can
connect your cable’s shield wire to CHS GND for
a ground connection. Refer to the USB Device
Chassis Ground section of Chapter 1, Getting
Started.
NC — — No connect—Do not connect signals to these
terminals.
*
On NI 6225 devices, the reference for each AI <16..63> signal is AI SENSE 2, and each AI <64..79>
signal is AI SENSE in NRSE mode.
†
USB-62xx Screw Terminal users can connect the shield of a shielded cable to the chassis ground lug
for a ground connection. The chassis ground lug is not available on all device versions.
Table 3-1. I/O Connector Signals (Continued)
Signal Name Reference Direction Description

National Instruments 622 Series Specifications

General

Brand	National Instruments
Model	622 Series
Category	I/O Systems
Language	English