USB device is
attached to REX
USB port but
REX device LED
is off.
• A USB device must have the
appropriate driver installed on the
computer operating system.
• The USB device is drawing more
current than allowed by USB
specification (>500mA).
1. Install the required USB device driver on the
computer operating system prior to attaching the
USB device to the REX unit. Please see your USB
device manufacturer’s website for details.
2. Consult your USB device documentation and
power your USB device with the additional, USB
device manufacturer supplied, power supply (if
available).