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WLS-IFC User's Guide
Power
Parameter
Supply current
Self-Powered Hub refers to a USB hub with an external power supply. Self-powered hubs allow
Note 3:
a connected USB device to draw up to 500 mA. This device may not be used with bus-powered
hubs due to the power supply requirements.
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 PC's) 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.
USB specifications
USB device type
Device compatibility
USB cable type
USB cable length
Environmental
Operating temperature range
Storage temperature range
Humidity
Mechanical
Dimensions
Table 5. Power specifications
Conditions
Table 6. USB specifications
USB 2.0 (full-speed)
USB 1.1, USB 2.0
Bus powered, 300 mA consumption max
A-B cable, UL type AWM 2725 or equivalent. (min 24 AWG VBUS/GND,
min 28 AWG D+/D-)
3 meters max.
Table 7. Environmental specifications
0 to 70 ° C
-40 to 85 ° C
0 to 90% non-condensing
Table 8. Mechanical specifications
79 mm (L) x 75 mm (W) x 26.5 mm (H)
14
Specifications
Specification
300 mA max (Note 3)
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