Power and Environmental Requirements
PHOTON
+
System Guide
9
3 Power and Environmental
Requirements
Power Requirements
Power for the
PHOTON
+
is provided by the USB connection. No other
power connection is needed. The USB standard requires the USB port to
provide 2.5 Watts of power to the USB device. The
PHOTON
+
can
consume as much as to 2.5 Watts. To ensure proper power supply to the
PHOTON
+
, it is not recommended that it be used on a hub with other USB
devices.
2.5 watts at 5 volt DC is equivalent to 500mA of electrical current. Some
PC USB-controllers provide the electrical current information. Below is
a bitmap showing the power management of the USB Root Hub with a
PHOTON
+
under typical operation:
Summary of Contents for PHOTON+
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