USB-1208FS User's Guide
Note 10:
Self-powered hub refers to a USB hub with an external power supply. Self-powered hubs allow a
connected USB device to draw up to 500 mA.
Root port hubs reside in the PC's USB host controller. The USB port(s) on your PC are root port
hubs. All externally powered root port hubs (desktop PCs) provide up to 500 mA of current for a
USB device. Battery-powered root port hubs provide 100 mA or 500 mA, depending upon the
manufacturer. A laptop PC that is not connected to an external power adapter is an example of a
battery-powered root port hub.
Bus powered hubs receive power from a self-powered or root port hub. In this case the
maximum current available from the USB +5 V is 100 mA. The minimum USB +5 V voltage
level can be as low as 4.1 V.
This refers to the total amount of current that can be sourced from the USB +5 V, analog outputs
Note 11:
and digital outputs.
General
Parameter
Device type
Device compatibility
Environmental
Operating temperature range
Storage temperature range
Humidity
Mechanical
Dimensions
USB cable length
User connection length
Main connector and pin out
Connector type
Wire gauge range
Table 18. General specifications
Conditions
Specification
USB 2.0 full speed
USB 1.1, USB 2.0
Table 19. Environmental specifications
0 to 70 °C
-40 to 70 °C
0 to 90% non-condensing
Table 20. Mechanical specifications
79 millimeters (mm) long x 82 mm wide x 25 mm high
3 meters max
3 meters max
Table 21. Main connector specifications
Screw terminal
16 AWG to 30 AWG
30
Specifications
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