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IMPO

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Go to www

.extron.com f

or the complete 

user guide

, installation instructions,

 and 

specifications bef

ore connecting the 

product to the po

wer sour

ce.

 

FOX II RS 104 and FOX RS 104 • Setup Guide

This guide provides instructions for an experienced installer to set up and operate the Extron 
FOX RS 104 and FOX II RS 104 RS-232 Inserters. The inserters provide local insertion points for 
long-haul RS-232 control. The inserters can be installed on the input of a fiber optic matrix switcher 
(see the figure below left) or on the output (see the figure below right).

NOTES:

• 

The FOX II RS 104 supports Extron legacy 

and

 FOX II products. The FOX RS 104 supports legacy products only. The two 

models are otherwise functionally identical.

• 

For more information on any subject in this guide, see the 

FOX RS 104 and FOX II RS 104 RS-232 Inserters User Guide

 at 

www.extron.com

.

A

B

1

Tx Rx

Tx Rx

UART

Tx

FOX

Tx

Rx

FOX Matrix Switcher

LAN

Ethernet

Inserted RS-232

Video &

Audio

Video &

Audio

FOX II RS 104

Fiber Optic RS-232 Inserter

PC or

Control System

OUT

IN

Control

LAN

A

B

1

Tx Rx

Tx Rx

UART

Tx

FOX

Rx

Rx

FOX Matrix Switcher

LAN

Ethernet

Video &

Audio

Video, Audio &

Inserted RS-232

FOX II RS 104

Fiber Optic RS-232 Inserter

PC or

Control System

OUT

IN

Control

LAN

Optical return

signal

Inserter connected on

switcher input

Inserter connected on

switcher output

Installation 

100-240V ~ 50/60 Hz

0.3 A MAX

A

B

A

B

A

B

A

B

1

Tx Rx

Tx Rx

2

Tx Rx

Tx Rx

3

Tx Rx

Tx Rx

4

Tx Rx

Tx Rx

LAN

RESET

FOX II RS 104

Rear

ã

ã

Ü

Ü

Õ

Õ

Î

Î

C

C

B

B

A

A

A

A

A

A

A

A

Step 1 — Mounting

Turn off or disconnect all equipment power  
sources and mount the inserter as required.

Step 2 — Connections

A

 

Fiber optic connectors and LEDs

 — Each 

port, 1 through 4, has two SFP optical 
transceiver modules with LC connectors, labeled “A” and “B.” Transceiver B is connected to an internal UART that inserts serial 
communications into the fiber optic signal or extracts the serial communications, depending on the application (see the connection 
example drawings above).

WARNING:

  The FOX inserter outputs continuous invisible light (class 1 rated), which may be harmful to the eyes; use 

with caution. Plug the attached dust caps into the transceivers when the fiber cable is unplugged.

AVERTISSEMENT :

 Le 

FOX inserter émet une lumière invisible en continu (conforme à la classe 1) qui peut être dangereux 

pour les yeux, à utiliser avec précaution. Branchez les protections contre la poussière dans l’ensemble émetteur/récepteur 
lorsque le câble fibre optique est débranché.

NOTE

:

  Ensure that you use the proper fiber cable for your inserter. Typically, singlemode fiber has a yellow jacket and multimode 

cable has an orange or aqua jacket.

Î

 

Tx A

 — For one-way communication from the inserter to a downstream device, typically a matrix switcher, connect a fiber optic 

cable to the Tx A LC connector. Connect the free end of this fiber optic cable to the In or Rx connector on the downstream device.

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