Analog Output Triggering; Connecting Analog Current Output Signals - National Instruments NI 6238 User Manual

Chapter 5 Analog Output

Analog Output Triggering

Connecting Analog Current Output Signals

Tip Internal voltage drop for the NI 6238/6239 devices is a maximum of 3 V relative to
the externally supplied voltage.
Caution The maximum output voltages rating of AO signals and input voltage ratings for
AO power supply with respect to AO GND and earth/chassis ground are listed in the
NI 6238/6239 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. NI 6238/6239 devices support
digital triggering, but do not support analog triggering. Refer to the
Start Trigger Signal and
information on these triggering actions.
AO <0..1> are the current output signals for AO channels 0 and 1. AO GND
is the ground reference for AO <0..1>.
Figure 5-2 shows how to make analog current output connections to the
device.
AO Power
Supply Pin
User-
Provided
+
Power
–
Supply
AO GND
Figure 5-2. Analog Current Output Connections
AO Pause Trigger Signal
Internal
Voltage
Drop
User-
Provided
User-Provided
Load
AO GND
5-4
sections for more
NI 6238/6239
DAC
AO x
AO
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