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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,
, to find the
default NI-DAQmx counter/timer pins for most
M Series devices.
USER <1,2>
—
—
User-Defined Channels
—On USB-62
xx
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
section for more information.
CHS GND
—
—
Chassis Ground
†
—This terminal connects to the
USB-62
xx
BNC device metal enclosure. You can
connect your cable’s shield wire to CHS GND for
a ground connection. Refer to the
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-62
xx
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
Summary of Contents for PCI-6281
Page 1: ...PCI 6281...
