The LEX unit
The LEX unit connects to the computer using a standard USB cable. Power for this unit is provided by the
USB on the host computer.
Front View
Rear View
ITEM TYPE
DESCRIPTION
1
Power LED (Blue)
LED turns on when power is supplied. Off when no power is
supplied.
2
Link LED (Green)
Indicates a valid ExtremeUSB® link is established between the LEX
and REX.
3
Host LED (Green)
Indicates that the Ranger 2224 system is properly enumerated on
the host PC. LED blinks when in suspend state.
4
Activity LED (Amber)
Indicates activity when data transmission is active between LEX
and REX. LED blinks intermittently with or without a USB device
connected. When the LEX and REX are in suspend mode, the LED
is off.
5
Earth Ground
Optional earth ground connection to housing of unit. Accepts an
M2 type screw.
6
Power port (optional)
Not required in normal operation. An optional 5V power supply
can be connected to the LEX unit to provide power if the USB port
on the host PC is not capable of delivering 500mA to the unit.
7
USB Type B connector
Used to connect the LEX unit to the host computer.
8
Link Port (Duplex LC)
Extension link Duplex LC fiber optic transceiver port.
4
5
6
7
8
1
2
3
4
