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National Instruments NI Vision NI 17xx 用户手册

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Chapter 2
Power and I/O
2-4
ni.com
Figure 2-2.  Connecting External Sinking Output Sensors to Isolated Inputs
Isolated Outputs
Caution
Do not power the load connected to the isolated outputs with any external power 
supply greater than 30 VDC. Voltages greater than 30 VDC may damage the NI Smart 
Camera.
Caution
The isolated inputs and outputs on the smart camera provide an easy means for 
preventing ground loops that could degrade signal integrity. The isolation on the smart 
camera is not safety isolation.
Sensor
Power
Sensor
Common
NI 17xx
NPN (Sinking)
Output Device
TrigIn+
IsoIn(0)+
IsoIn(1)+
TrigIn–
IsoIn(0)–
IsoIn(1)–