Programmable Function Input Connections; Figure 4-11. Timing I/O Connections - National Instruments DAQ PCI E Series User Manual

TRIG1
Source

Programmable Function Input Connections

© National Instruments Corporation
All digital timing connections are referenced to DGND. This reference
is demonstrated in Figure 4-11, which shows how to connect an
external TRIG1 source and an external CONVERT* source to two
PCI E Series board PFI pins.
CONVERT*
Source
I/O Connector

Figure 4-11. Timing I/O Connections

There are a total of 13 internal timing signals that you can externally
control from the PFI pins. The source for each of these signals is
software-selectable from any of the PFIs when you want external
control. This flexible routing scheme reduces the need to change the
physical wiring to the board I/O connector for different applications
requiring alternative wiring.
You can individually enable each of the PFI pins to output a specific
internal timing signal. For example, if you need the CONVERT* signal
as an output on the I/O connector, software can turn on the output driver
PFI0/TRIG1
PFI2/CONVERT*
4-27
Chapter 4 Signal Connections
DGND
E Series Board
PCI E Series User Manual