Network Device User's Manual

Chapter 3 I/O Connector

+5 V Power Source

(NI 6124 Only) The +5 V pins on the I/O connector supply +5 V power. You

can use these pins, referenced to D GND, to power external circuitry.

Power rating (most devices): +4.65 to +5.25 VDC at 1 A.

To find your device’s power rating, refer to the specifications document for

your device.

Caution Never connect these +5 V power pins to analog or digital ground or to any other

voltage source on the S Series device or any other device. Doing so can damage the device

and the computer. NI is not liable for damage resulting from such a connection.

PFI <0..5>/P0.<0..5> D GND Input Programmable Function Interface or Static Digital

Input Channels 0 to 5—Each of these terminals can be

individually configured as a PFI terminal or a digital input

terminal.

As an input, each PFI terminal can be used to supply an

external source for AI or AO timing signals or

counter/timer inputs.

Note: PFI <0..5>/P0.<0..5> are isolated from earth

ground and chassis ground.

PFI <6..9>/P1.<0..3> D GND Output Programmable Function Interface or Static Digital

Output Channels 6 to 9—Each of these terminals can be

individually configured as a PFI terminal or a digital

output terminal.

As a PFI output, you can route many different internal AI

or AO timing signals to each PFI terminal. You also can

route the counter/timer outputs to each PFI terminal.

Note: PFI <6..9>/P1.<0..3> are isolated from earth

ground and chassis ground.

D GND — — Digital Ground—D GND supplies the reference

for input PFI <0..5>/P0.<0..5> and output PFI <6..9>/

P1.<0..3>.

Note: D GND is isolated from earth ground and chassis

ground.

NC — — No Connect—Do not connect signals to these terminals.

Table 3-2. NI 6154 I/O Connector Signal Descriptions (Continued)

I/O Connector Pin Reference Direction Signal Description