Connecting Timing Signals - National Instruments 6711 User Manual

Connecting Timing Signals

Caution
for your device can damage your device and the computer. NI is not liable for any
damage resulting from signal connections that exceed the maximum ratings.
The 10 programmable function interface (PFI) pins labeled PFI <0..9> route all external control
over the timing of the device. These lines serve as connections to virtually all internal timing
signals. These PFIs are bidirectional. As outputs they are not programmable and reflect the state
of many waveform generation and counter 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 all timing signals.
All digital timing connections are referenced to D GND. Figure 7-2 shows this reference, and
how to connect an external PFI 0 source and an external PFI 2 source to two PFI pins.
Figure 7-2. Connecting PFI 0 and PFI 2 to Two PFI Pins
PFI 0
Source
Exceeding the maximum input voltage ratings listed in the specifications
PFI 2
Source
I/O Connector
TitleShort-Hidden (cross reference text)
PFI 0
PFI 2
D GND
AO Series Device
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