National Instruments NI 9264 - Manual (Page 8)

NI 9264 Operating Instructions and Specifications 8 ni.com
Each channel of the NI 9264 has a terminal to which you can
connect the positive lead of a load. Each channel also has a
common terminal, COM, and there are four additional COM
terminals at the bottom of the connector. All of the COM terminals
are internally connected to the isolated ground reference of the
module. When connecting a load to the NI 9264, connect the
positive lead of the load to the AO terminal, and the ground of the
load to a COM terminal. Refer to Figure 3 for an illustration of
connecting a load to the NI 9264.
Figure 3. Connecting a Load to the NI 9264
Each channel has a digital-to-analog converter (DAC) that
produces a voltage signal. Each channel also has overvoltage
and short-circuit protection. Refer to the
Specifications section
for more information about overvoltage and short-circuit
COM
AO
Load
NI 9264