Supplying Power To The Cradle; Using The Usb Interface To Supply Power - Symbol LS4278 Product Reference Manual

6. If applicable, thread the interface cable over the cable support hook and run the host and power cables into their respective
cable grooves.
7. Mount the cradle, as necessary. (For information on mounting the cradle, refer to the documentation included with the
cradle.)
Disconnect the power supply before changing host cables, or the cradle may not recognize the new host.
Different cables are required for different hosts. The connectors illustrated in each host chapter are examples
only. The connectors may be different from those illustrated, but the steps to connect the cradle remain the
same.

Supplying Power to the Cradle

The cradle receives power from one of two sources:
• An external power supply.
• When connected to the host through a host cable that supplies power.
The cradle detects whether the host or the external supply is supplying power. It always draws power from the external supply when
available, regardless of the presence of power from a host.

Using the USB Interface to Supply Power

When the cradle is connected to the host via the USB interface, it can be powered by the USB port instead of an external power
supply. Powering from a USB host limits charging. The scanner charges at a slower rate than when charging from an external power
supply.
The radio link functions normally when the cradle draws power from a USB host.
Getting Started 1-9