Power Connections; Timing Connections - National Instruments DAQ PCI E Series User Manual

Chapter 4 Signal Connections

Power Connections

Caution:
!

Timing Connections

Caution:
!
PCI E Series User Manual
Two pins on the I/0 connector supply +5 V from the computer power
supply via a self-resetting fuse. The fuse will reset automatically within
a few seconds after the overcurrent condition is removed. These pins are
referenced to DGND and can be used to power external digital circuitry.
• Power rating
Under no circumstances should you connect these +5 V power pins directly
to analog or digital ground or to any other voltage source on the PCI E
Series board or any other device. Doing so can damage the PCI E Series
board and the computer. National Instruments is
resulting from such a connection.
Exceeding the maximum input voltage ratings, which are listed in
Tables 4-1, 4-2, and 4-3 can damage the PCI E Series board and the
computer. National Instruments is
from such signal connections.
All external control over the timing of your PCI E Series board is routed
through the 10 programmable function inputs labeled PFI0 through
PFI9. These signals are explained in detail in the next section,
Programmable Function Input Connections. These PFIs are
bidirectional; as outputs they are not programmable and reflect the state
of many DAQ, waveform generation, and general-purpose timing
signals. There are five other dedicated outputs for the remainder of the
timing signals. As inputs, the PFI signals are programmable and can
control any DAQ, waveform generation, and general-purpose timing
signals.
The DAQ signals are explained in the DAQ Timing Connections section
later in this chapter. The waveform generation signals are explained in
the Waveform Generation Timing Connections section later in this
chapter. The general-purpose timing signals are explained in the
General-Purpose Timing Signal Connections section later in this
chapter.
+4.65 to +5.25 VDC at 1 A
liable for any damages resulting
NOT
4-26
liable for damages
NOT
© National Instruments Corporation