Measurement Computing USB-1208FS-Plus-OEM - Manual (Page 18)

USB-1208FS-Plus-OEM User's Guide Functional Details
18
Power
Connecting the device to a computer draws <100 mA of current from the USB +5V supply. When running
applications, the current that can be drawn from all device connections (analog, digital, SYNC, and +VO output
loading) is <500 mA. The maximum output current that is available at the +VO power output terminal is
100 mA.
With all outputs at their maximum output current, the USB-1208FS-Plus-OEM in a fully-loaded configuration
may be above that allowed by the computer. In this case, determine the per-pin loading in the application to
ensure that the maximum loading criteria is met. The per-pin loading is calculated by dividing +5V by the load
impedance of the pin in question.
Mechanical drawings
Figure 13. Circuit board dimensions