Measurement-computing USB-231 Manuel d'utilisateur télécharger pdf (Page 20)

USB-231 User's Guide Functional Details

Figure 12. Connecting the +VO power source load

The + 5 V power is always enabled and the voltage is present at the +VO terminal when the device is in active

mode. The +5 V power source is not available for about one second after the device is first connected to the

USB connector or when the device is in suspend mode.

Ground

The analog ground (AGND) terminals provide a common ground for all analog channels. The digital ground

(

DND) terminals provide a common ground for the digital, counter, and power terminal.

For more information about signal connections

For more information about analog and digital signal connections, refer to the Guide to Signal Connections at

www.mccdaq.com/pdfs/DAQ-Signal-Connections.pdf.

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Measurement-computing USB-231 Manuel d'utilisateur Page 20