User Manual

The REX Unit

The REX unit provides USB Type A ports for standard USB devices. The REX unit allows you to connect up to

four USB devices directly. Additional devices may be connected by attaching USB hubs to the REX unit.

The REX unit is powered by an external AC adapter and can supply up to 500mA to each USB port.

Front View

Rear View

ITEM TYPE DESCRIPTION

1 Device Port (USB

Type A)

Accepts USB device(s).

2 Device LED

(Green/Orange)

Indicates when a USB device is connected to the Device Port. Solid

green when device is plugged in and active. Off when device is in

suspend mode or REX unit is powered off. Orange when the REX

unit detects an overcurrent condition, and the attached USB device

attempts to draw more than the 500mA current.

3 Power LED (Blue) LED turns on when power is supplied. Off when no power is supplied.

4 Link LED (Green) Indicates a valid ExtremeUSB® link is established between the LEX and

REX over Cat 5 cabling. LED turns on when link between LEX and REX is

established. Off when there is no link between LEX and REX.

5 Host LED (Green) Indicates that the Ranger 2204 system is properly enumerated on the

host PC. LED blinks when in suspend state.

6 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.

7 Earth Ground Optional Earth Ground connection to housing of unit. Accepts an M2

type screw.

8 Power Port Connects to the AC power supply. Required at REX for proper

operation.

9 Link Port (RJ45) Accepts RJ45 connector for Cat 5 cabling (or better)

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