Chapter 5 Analog Output
© National Instruments Corporation 5-3 M Series User Manual
(NI 628x Devices) On NI 628x devices, the AO offset of each analog output
can be individually set to one of the following:
•0V (AOGND)
•5V
•APFI<0..1>
• AO <0..3>
You can connect an external signal to APFI <0..1> to provide the AO offset.
You can route the output of one of the AO <0..3> signals to be the AO offset
for a different AO <0..3> signal. For example, AO 0 can be routed to be the
AO offset of AO 1. This route is done on the device; no external
connections are required.
You cannot route an AO channel to be its own offset.
On NI 628x devices, the AO reference of each analog output can be
individually set to one of the following:
• ±10 V
•±5V
•±APFI<0..1>
•±AO<0..3>
You can connect an external signal to APFI <0..1> to provide the AO
reference.
You can route the output of one of the AO <0..3> signals to be the AO
reference for a different AO <0..3> signal. For example, AO 0 can be
routed to be the AO reference of AO 1. This route is done on the device;
no external connections are required.
You cannot route an AO channel to be its own reference.
The AO reference can be a positive or negative voltage. If AO reference is
a negative voltage, the polarity of the AO output is inverted.