Owner 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

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

a maximum of 14 USB devices or 3 USB hubs with 11 USB devices. The REX unit is powered via the Cat 5 link

extension cable from the LEX unit. Each USB port delivers 500mA of power to the attached USB device(s).

Front 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 to unit via Cat 5 cable from LEX.

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 Ranger 2212 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 Link Port (RJ45) Accepts RJ45 connector for Cat 5 cabling (or better).

Rear View

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