Analog Output Digital Triggering; Connecting Analog Output Signals - National Instruments NI USB-621x User Manual

Chapter 7 Analog Output

Analog Output Digital Triggering

Connecting Analog Output Signals

NI USB-621x User Manual
the buffer at a fast enough rate to keep up with the generation, the buffer
will underflow and cause an error.
Analog output supports two different triggering actions:
• Start trigger
• Pause trigger
A digital trigger can initiate these actions on the USB-621x devices. Refer
to the AO Start Trigger Signal
more information about these triggering actions.
AO <0..1> are the voltage output signals for AO channels 0 and 1.
AO GND is the ground reference for AO <0..1>.
Figure 7-2 shows how to make AO connections to the device.
+
V OUT
Load
–
AO GND
–
Load
V OUT
+
Figure 7-2. Analog Output Connections
and AO Pause Trigger Signal
Analog Output Channels
AO 0
Channel 0
AO 1
Channel 1
M Series Device
7-4
sections for
Isolation
Barrier
(USB-6215
and USB-6218
devices only)
Digital
Isolators
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