National Instruments Data Acquisition Device E Series - Manual (Page 33)

Chapter 1 DAQ System Overview
E Series User Manual 1-16 ni.com
+5 V Power Source
The +5 V pins on the I/O connector supply +5 V power on the plug-in cards
or from an internal step-down voltage regulator on DAQPads. You can
use these pins, referenced to D GND, to power external circuitry. A
self-resetting fuse protects the supply from overcurrent conditions. The
fuse resets automatically within a few seconds after the overcurrent
condition is removed.
Power rating (most devices): +4.65 to +5.25 VDC at 1 A.
To find your device 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 E 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.
REQ# PFI #
SCANCLK AI HOLD COMP or AI HOLD
SISOURCE AI Sample Clock Timebase
STARTSCAN AI SAMP CLK or AI SAMP
STOPTRIG# PFI #
TRIG1 AI START TRIG or AI START
TRIG2 AI REF TRIG or REF TRIG
UISOURCE AO Sample Clock Timebase
UPDATE AO SAMP CLK or AO SAMP
WFTRIG AO START TRIG or AO START
Table 1-5. Terminal Name Equivalents (Continued)
Traditional NI-DAQ (Legacy) NI-DAQmx