Extron electronics SW2 USB, SW4 USB Plus, SW4 USB User Manual

SW USB Series

USB Switchers

User Guide

Switchers

68-1517-01 Rev. F

02 12

Safety Instructions • English

This symbol is intended to alert the user of important operating and
maintenance (servicing) instructions in the literature provided with the
equipment.

This symbol is intended to alert the user of the presence of uninsulated
dangerous voltage within the product enclosure that may present a risk of
electric shock.

Caution

Read Instructions • Read and understand all safety and operating instructions before using the equipment.
Retain Instructions • The safety instructions should be kept for future reference.
Follow Warnings • Follow all warnings and instructions marked on the equipment or in the user information.
Avoid Attachments • Do not use tools or attachments that are not recommended by the equipment

manufacturer because they may be hazardous.

Warning

Power sources • This equipment should be operated only from the power source indicated on the product. This

equipment is intended to be used with a main power system with a grounded (neutral) conductor. The third
(grounding) pin is a safety feature; do not attempt to bypass or disable it.

Power disconnection • To remove power from the equipment safely, remove all power cords from the rear of

the equipment, the desktop power module (if detachable), or the power source receptacle (wall plug).

Power cord protection • Power cords should be routed so that they are not likely to be stepped on or pinched

by items placed upon or against them.

Servicing • Refer all servicing to qualified service personnel. There are no user-serviceable parts inside. To prevent

the risk of shock, do not attempt to service this equipment yourself because opening or removing covers may
expose you to dangerous voltage or other hazards.

Slots and openings • If the equipment has slots or holes in the enclosure, these are provided to prevent

overheating of sensitive components inside. These openings must never be blocked by other objects.

Lithium battery • There is a danger of explosion if battery is incorrectly replaced. Replace it only with the

same or equivalent type recommended by the manufacturer. Dispose of used batteries according to the
manufacturer instructions.

Consignes de Sécurité • Français

Ce symbole sert à avertir l’utilisateur que la documentation fournie avec le
matériel contient des instructions importantes concernant l’exploitation et la
maintenance (réparation).

Ce symbole sert à avertir l’utilisateur de la présence dans le boîtier
de l’appareil de tensions dangereuses non isolées posant des risques
d’électrocution.

Attention

Lire les instructions• Prendre connaissance de toutes les consignes de sécurité et d’exploitation avant

d’utiliser le matériel.

Conserver les instructions• Ranger les consignes de sécurité afin de pouvoir les consulter à l’avenir.
Respecter les avertissements • Observer tous les avertissements et consignes marqués sur le matériel ou

présentés dans la documentation utilisateur.

Eviter les pièces de fixation • Ne pas utiliser de pièces de fixation ni d’outils non recommandés par le

fabricant du matériel car cela risquerait de poser certains dangers.

Sicherheitsanleitungen • Deutsch

Dieses Symbol soll dem Benutzer in der im Lieferumfang enthaltenen
Dokumentation besonders wichtige Hinweise zur Bedienung und Wartung
(Instandhaltung) geben.

Dieses Symbol soll den Benutzer darauf aufmerksam machen, daß im Inneren
des Gehäuses dieses Produktes gefährliche Spannungen, die nicht isoliert sind
und die einen elektrischen Schock verursachen können, herrschen.

Achtung

Lesen der Anleitungen • Bevor Sie das Gerät zum ersten Mal verwenden, sollten Sie alle Sicherheits-und

Bedienungsanleitungen genau durchlesen und verstehen.

Aufbewahren der Anleitungen • Die Hinweise zur elektrischen Sicherheit des Produktes sollten Sie

aufbewahren, damit Sie im Bedarfsfall darauf zurückgreifen können.

Befolgen der Warnhinweise • Befolgen Sie alle Warnhinweise und Anleitungen auf dem Gerät oder in der

Benutzerdokumentation.

Keine Zusatzgeräte • Verwenden Sie keine Werkzeuge oder Zusatzgeräte, die nicht ausdrücklich vom

Hersteller empfohlen wurden, da diese eine Gefahrenquelle darstellen können.

Avertissement

Alimentations • Ne faire fonctionner ce matériel qu’avec la source d’alimentation indiquée sur l’appareil. Ce

matériel doit être utilisé avec une alimentation principale comportant un fil de terre (neutre). Le troisième
contact (de mise à la terre) constitue un dispositif de sécurité : n’essayez pas de la contourner ni de la
désactiver.

Déconnexion de l’alimentation• Pour mettre le matériel hors tension sans danger, déconnectez tous les

cordons d’alimentation de l’arrière de l’appareil ou du module d’alimentation de bureau (s’il est amovible) ou
encore de la prise secteur.

Protection du cordon d’alimentation • Acheminer les cordons d’alimentation de manière à ce que personne

ne risque de marcher dessus et à ce qu’ils ne soient pas écrasés ou pincés par des objets.

Réparation-maintenance • Faire exécuter toutes les interventions de réparation-maintenance par un

technicien qualifié. Aucun des éléments internes ne peut être réparé par l’utilisateur. Afin d’éviter tout danger
d’électrocution, l’utilisateur ne doit pas essayer de procéder lui-même à ces opérations car l’ouverture ou le
retrait des couvercles risquent de l’exposer à de hautes tensions et autres dangers.

Fentes et orifices • Si le boîtier de l’appareil comporte des fentes ou des orifices, ceux-ci servent à empêcher les

composants internes sensibles de surchauffer. Ces ouvertures ne doivent jamais être bloquées par des objets.

Lithium Batterie • Il a danger d’explosion s’ll y a remplacment incorrect de la batterie. Remplacer uniquement

avec une batterie du meme type ou d’un type equivalent recommande par le constructeur. Mettre au reut les
batteries usagees conformement aux instructions du fabricant.

Vorsicht

Stromquellen • Dieses Gerät sollte nur über die auf dem Produkt angegebene Stromquelle betrieben werden.

Dieses Gerät wurde für eine Verwendung mit einer Hauptstromleitung mit einem geerdeten (neutralen) Leiter
konzipiert. Der dritte Kontakt ist für einen Erdanschluß, und stellt eine Sicherheitsfunktion dar. Diese sollte nicht
umgangen oder außer Betrieb gesetzt werden.

Stromunterbrechung • Um das Gerät auf sichere Weise vom Netz zu trennen, sollten Sie alle Netzkabel aus der

Rückseite des Gerätes, aus der externen Stomversorgung (falls dies möglich ist) oder aus der Wandsteckdose

ziehen.

Schutz des Netzkabels • Netzkabel sollten stets so verlegt werden, daß sie nicht im Weg liegen und niemand

darauf treten kann oder Objekte darauf- oder unmittelbar dagegengestellt werden können.

Wartung • Alle Wartungsmaßnahmen sollten nur von qualiziertem Servicepersonal durchgeführt werden.

Die internen Komponenten des Gerätes sind wartungsfrei. Zur Vermeidung eines elektrischen Schocks
versuchen Sie in keinem Fall, dieses Gerät selbst öffnen, da beim Entfernen der Abdeckungen die Gefahr eines
elektrischen Schlags und/oder andere Gefahren bestehen.

Schlitze und Öffnungen • Wenn das Gerät Schlitze oder Löcher im Gehäuse aufweist, dienen diese zur

Vermeidung einer Überhitzung der empndlichen Teile im Inneren. Diese Öffnungen dürfen niemals von

anderen Objekten blockiert werden.

Litium-Batterie • Explosionsgefahr, falls die Batterie nicht richtig ersetzt wird. Ersetzen Sie verbrauchte Batterien

nur durch den gleichen oder einen vergleichbaren Batterietyp, der auch vom Hersteller empfohlen wird.
Entsorgen Sie verbrauchte Batterien bitte gemäß den Herstelleranweisungen.

Instrucciones de seguridad • Español

Este símbolo se utiliza para advertir al usuario sobre instrucciones
importantes de operación y mantenimiento (o cambio de partes) que se
desean destacar en el contenido de la documentación suministrada con los
equipos.

Este símbolo se utiliza para advertir al usuario sobre la presencia de
elementos con voltaje peligroso sin protección aislante, que puedan
encontrarse dentro de la caja o alojamiento del producto, y que puedan
representar riesgo de electrocución.

Precaucion

Leer las instrucciones • Leer y analizar todas las instrucciones de operación y seguridad, antes de usar el

equipo.

Conservar las instrucciones • Conservar las instrucciones de seguridad para futura consulta.
Obedecer las advertencias • Todas las advertencias e instrucciones marcadas en el equipo o en la

documentación del usuario, deben ser obedecidas.

Evitar el uso de accesorios • No usar herramientas o accesorios que no sean especificamente

recomendados por el fabricante, ya que podrian implicar riesgos.

安全须知 • 中文

这个符号提示用户该设备用户手册中有重要的操作和维护说明。

这个符号警告用户该设备机壳内有暴露的危险电压，有触电危险。

注意

阅读说明书 • 用户使 用该设备前必须阅读并理 解所有安全和 使用说明。
保存说明书 • 用户应保存安全说明书以备将来使用。
遵守警告 • 用户应遵守产品和用户指南上的所有安 全和操作说明。
避免追加 • 不要使 用该产品厂商没有推荐的工具或追加设备，以避免危险。

Advertencia

Alimentación eléctrica • Este equipo debe conectarse únicamente a la fuente/tipo de alimentación eléctrica

indicada en el mismo. La alimentación eléctrica de este equipo debe provenir de un sistema de distribución
general con conductor neutro a tierra. La tercera pata (puesta a tierra) es una medida de seguridad, no
puentearia ni eliminaria.

Desconexión de alimentación eléctrica • Para desconectar con seguridad la acometida de alimentación

eléctrica al equipo, desenchufar todos los cables de alimentación en el panel trasero del equipo, o desenchufar
el módulo de alimentación (si fuera independiente), o desenchufar el cable del receptáculo de la pared.

Protección del cables de alimentación • Los cables de alimentación eléctrica se deben instalar en lugares

donde no sean pisados ni apretados por objetos que se puedan apoyar sobre ellos.

Reparaciones y mantenimiento • Solicitar siempre los servicios técnicos de personal calicado. En el interior

no hay partes a las que el usuario deba acceder. Para evitar riesgo de electrocución, no intentar personalmente
la reparación/mantenimiento de este equipo, ya que al abrir o extraer las tapas puede quedar expuesto a
voltajes peligrosos u otros riesgos.

Ranuras y aberturas • Si el equipo posee ranuras o orificios en su caja/alojamiento, es para evitar el

sobrecalientamiento de componentes internos sensibles. Estas aberturas nunca se deben obstruir con otros

objetos.

Batería de litio • Existe riesgo de explosión si esta batería se coloca en la posición incorrecta. Cambiar esta

batería únicamente con el mismo tipo (o su equivalente) recomendado por el fabricante. Desachar las baterías

usadas siguiendo las instrucciones del fabricante.

警告

电源 • 该设备只能使用产品上标明的电源。 设备必须使用有地线的供电系统供电。 第三条线（

地线）是安全设施，不能不用或跳过 。

拔掉电源 • 为安全 地从设备拔掉电源，请拔掉所有设备后或桌面电源的电源线，或任何接到市电

系统的电源 线。

电源线保护 • 妥善布线， 避免被踩踏，或重物挤压。
维护 • 所有维修必须由认证的维修人员进行。 设备内部没有用户可以更换的零件。为避免出现触

电危险不 要自己试图打开设备盖子维修 该设备。

通风孔 • 有些设备机壳上有通风槽或孔，它们是用来防止机内敏感元件过热。 不要用任何 东西

挡住通风孔。

锂电池 • 不正确的更换电池会有爆炸的危险。必须使用与厂家推荐的相同或相近型号的电池。按

照生产厂的建议处 理废弃电 池。

ii

FCC Class A Notice

This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to part 15
of the FCC Rules. Operation is subject to the following two conditions:

1. This device may not cause harmful interference.

2. This device must accept any interference received, including interference that may cause undesired operation.

The Class A limits are designed to provide reasonable protection against harmful interference when the equipment
is operated in a commercial environment. This equipment generates, uses, and can radiate radio frequency energy
and, if not installed and used in accordance with the instruction manual, may cause harmful interference to radio
communications. Operation of this equipment in a residential area is likely to cause harmful interference, in which
case the user will be required to correct the interference at his own expense.

NOTE: This unit was tested with shielded cables on the peripheral devices. Shielded cables must be used with

the unit to ensure compliance with FCC emissions limits.

For more information on safety guidelines, regulatory compliances, EMI/EMF compliance, accessibility, and

related topics, click here.

iii

Conventions Used in this Guide

In this user guide, the following are used:

CAUTION: A caution indicates a potential hazard to equipment or data.

NOTE: A note draws attention to important information.

TIP: A tip provides a suggestion to make working with the device easier.

WARNING: A warning warns of things or actions that might cause injury, death, or

other severe consequences.

Commands are written in the fonts shown here:

^AR Merge Scene,,Op1 scene 1,1 ^B 51 ^W^C

[01] R 0004 00300 00400 00800 00600 [02] 35 [17] [03]

E X! *X1&* X2)* X2#* X2!

CE

}

NOTE: For commands and examples of computer or device responses mentioned

in this guide, the character “0” is used for the number zero and “O”
represents the capital letter “o.”

Computer responses and directory paths that do not have variables are written in the font
shown here:

Reply from 208.132.180.48: bytes=32 times=2ms TTL=32

C:\Program Files\Extron

Variables are written in slanted form as shown here:

ping xxx.xxx.xxx.xxx —t

SOH R Data STX Command ETB ETX

Selectable items, such as menu names, menu options, buttons, tabs, and field names are
written in the font shown here:

From the File menu, select New.

Click the OK button.

Copyright

© 2012 Extron Electronics. All rights reserved.

Trademarks

All trademarks mentioned in this guide are the properties of their respective owners.

iv

Contents

Introduction............................................................ 1

About this Guide ................................................ 1

About the SW USB Series .................................... 1

Features .............................................................. 1

Application Diagrams .......................................... 2

Installation .............................................................. 4

Installation Overview ........................................... 4

Rear Panel Features ............................................. 5

Wiring the Power Connector .............................. 6

Wiring for RS-232 Communication ..................... 8

RS-232 Port .................................................... 8

RS-232 Pass Thru Port ..................................... 9

Setting Up Contact Closure Control .................... 9

Controlling an Extron AV Switcher .................. 9

Connecting Multiple SW USBs in a System ........ 11

Operation .............................................................. 12

Front Panel Features .......................................... 12

Operations ....................................................... 13

Powering on the System ............................... 13

Selecting an Input ......................................... 13

Issuing Commands to an Extron AV

Switcher via the RS-232 Pass Thru Port ......... 14

Locking and Unlocking the Front Panel

(Executive Mode) ......................................... 16

Resetting ...................................................... 17

Host Emulation (SW4 USB Plus Only) ............. 17

Troubleshooting ............................................ 18

Peripheral Emulation (SW4 USB Plus Only) ..... 18

Updating Firmware ........................................... 18

SIS Programming and Control .......................... 23

Host-to-Switcher Communications .................... 23

Switcher-initiated Messages .......................... 23

Error Responses............................................. 24

Using the Command and Response Table .......... 24

Symbol Definitions ........................................ 24

Command and Response Table for SIS

Commands ...................................................... 25

Reference Information ....................................... 27

Specifications .................................................... 27

Part Numbers and Accessories ........................... 29

Optional Accessories ..................................... 29

Mounting Options ........................................ 29

Mounting the SW USB Series Switcher .............. 30

Tabletop Use ................................................. 30

Rack Mounting ............................................. 30

Furniture Mounting ....................................... 31

SW USB Series • Contents v

SW USB Series • Contents vi

Introduction

This section gives an overview of the Extron SW USB Series switchers. Topics include:

• About this Guide

• About the SW USB Series

• Features

• Application Diagrams

About this Guide

This guide describes the Extron SW2 USB, SW4 USB, and SW4 USB Plus switchers and
provides instructions on installing, configuring, and operating them. The terms “SW USB”

and “switcher” are used throughout this guide to refer to all models.

About the SW USB Series

The SW USB Series switchers make it possible for two or four host computers to share and
switch among up to four peripheral USB devices such as mass storage devices, keyboards,
mice, and other human interface devices (HIDs). They function as USB hubs with switching

and device emulation, so that connections are maintained between host computers and
peripherals.

Features

A number of specialized features help to streamline system integration, including port status

indication, RS-232 pass-through, front panel security lockout, and multiple control points.

• Outputs — Four female USB type A connectors act as a USB hub. Each port supplies

the 500 mA, 5 V rating required in the USB specification.

• USB 2.0 compatibility — The SW USB switchers are backward compatible with all

previous USB data rate standards, including low speed (1.5 Mbps), full speed (12 Mbps),

and high speed (480 Mbps).

• Mounting — The SW USB Series switchers have compact 1U high, ½-rack wide,

3 inches (7.6 cm) deep metal enclosures that can be mounted on a rack shelf or under

or through furniture.

• Host and peripheral emulation — The SW4 USB Plus model provides increased

system reliability by enabling an uninterrupted connection between host and peripheral
devices.

• Host emulation: When a keyboard or a mouse is connected to port 3 or 4 and

the appropriate rear panel DIP switch is set to On, the SW USB switches to the

connected keyboard or mouse instantly (see “Host Emulation (SW4 USB Plus

Only)” in the “Operation” section for more information).

• Peripheral emulation: The SW USB provides problem-free boot-up by constantly

emulating a keyboard and mouse to the computer or another input device,
regardless of whether or not a keyboard or mouse is actually connected.

• Power supply — An external power supply provides worldwide compatibility.

SW USB Series • Introduction 1

• RS-232 control and pass-through — The SW USB switcher can be controlled by

Simple Instruction Set (SIS™) commands received via an RS-232 interface. These SIS

commands can be sent to an RS-232 controllable Extron AV switcher attached to the
SW USB RS-232 Pass Thru port (see the “SIS Programming and Control” section for

an explanation of the available SIS commands).

• Contact closure control — Connecting a push-button contact closure device to the SW

USB Contact port or shorting pin 1, 2, 3, or 4 to the ground (_) pin of the Contact port
provides an alternative method of input selection on the SW USB. Commands issued via
contact closure can also be passed through the RS-232 Pass Thru port to an attached
RS-232 controllable Extron switcher (see “Setting Up Contact Closure Control” in the

“Installation” section for more information).

• Hot key switching — (SW4 USB Plus only) When host emulation is enabled, inputs can

be selected by a combination of key presses on a keyboard connected to port 3 or 4.

• Front panel security lockout (executive mode) — To prevent unauthorized access

to the switchers, front panel lock mode can be enabled via front panel controls or SIS
commands to disable all front panel controls.

• Port status LEDs — The Active USB LEDs provide visual indication of port status and

activity for USB peripherals and all connected and active host devices.

Application Diagrams

The following diagrams show examples of how an SW USB Series switcher can be

connected.

Active Video

USB

Video:

RED

Channel

Horizontal
Sync
Pulse

Interactive White Board

Extron
SW4 USB

USB Switcher

RS-232

4

CONTACT

3

2

Tx Rx

USB 1

USB OUTPUT HUB

USB 2

1

Tx

USB 3

USB 4

USB

RS-232

PASS THRU

PC 4

PC 3

USB SWITCHING INPUT

PC 2

PC 1

POWER
12V

+

0.4A MAX

USB OUT 2

USB OUT 1

USB 101 Rx

AUTO

SWITCH

VTR001 AAP

AAP 102

USB

PC PC PC PC

Figure 1. Connection Diagram for an SW4 USB Switcher with Interactive White

Board

SW USB Series • Introduction 2

Control System

-through

RS-232

Visualizer

with RS-232

RS-232 Loop-through

REMOTE

OUTPUT

3

INPUTS

4

1

100-240V 0.2A

2

50-60Hz

Extron
SW4 VGA Ars

VGA/Audio
Switcher

VGA

SW6 VGA Ars

OUTPUT

R

L

VGA
Out

Projector

Annotator

Extron
SW4 USB

USB

PC

USB SWITCHING INPUT

PC 1

POWER
12V

+

1.5A MAX

USB 1

PC 4

PC 3

PC 2

Laptop

VGA Outputs

USB OUTPUT HUB

RS-232

4

CONTACT

3

2

Tx Rx

1

Tx

USB 3

RS-232

PASS THRU

USB 4

USB 2

USB

Figure 2. Connection Diagram for an SW4 USB Switcher with an SW VGA Series

Switcher in an Annotator Application

Mouse

Keyboard

RS-232

RS-232
Control System

Extron

RS-232

4

CONTACT

3

Tx Rx

2

1

HOST

Tx

EMULATION

MOUSE

ON

ON

USB 3

USB OUTPUTS HUB

RS-232

PASS THRU

OFF

KEYBOARD

USB 2

USB 4

USB 1

PC 4

PC 3

USB SWITCHED INPUTS

PC 2

PC 1

POWER

12V

+

1.5A MAX

SW4 USB Plus

USB Switcher

RS-232
Loop

USB

Desktop

INPUTS

1

100-240V 0.2A

2

50-60Hz

PC #4

3

4

SW4 VGA Ars

REMOTE

OUTPUT

L R

OUTPUT

Desktop
PC #3

Desktop
Desktop
PC #1

PC #2

Extron

VGA
Outputs

SW4 VGA Ars

VGA/Audio Switcher

Flat Panel Display

Figure 3. Connection Diagram for an SW4 USB Plus Switcher in a

Keyboard-Video-Mouse (KVM) Switching Application

SW USB Series • Introduction 3

Installation

This section gives an overview of the steps to installing the SW USB Series switchers. It

also provides a description of the rear panel connectors and instructions for cabling. The
following topics are discussed:

• Installation Overview

• Rear Panel Features

• Wiring the Power Connector

• Wiring for RS-232 Communication

• Setting Up Contact Closure Control

• Connecting Multiple SW USBs in a System

Installation Overview

To install and set up the SW USB switcher:

1. (Optional) Mount the switcher to a rack shelf or furniture (see “Mounting the SW USB

Series Switcher” in the “Reference Information” section).

2. Connect host devices to one or more SW USB Switched Input type B connectors, using

cable lengths of up to 15 feet (4.5 m).

3. Connect one or more peripheral USB devices to the SW USB Output Hub type A

connectors, using USB cable lengths of up to 15 feet (4.5 m).

4. (Optional) Connect an RS-232 cable between the SW USB RS-232 port and a host

computer or control system (see “Wiring for RS-232 Communication” on page 8).

NOTE: The computer that you use for RS-232 control should not be one of the

host devices connected to any of the input ports.

5. (Optional) Connect an external Extron AV switcher to the RS-232 Pass Thru port. You

can then control this switcher via commands sent through this port.

6. (Optional) Wire one of the provided 3-pole or 5-pole captive screw plugs to a 2-button

or 4-button contact closure device, and connect the device to the SW USB Contact port

(see “Setting Up Contact Closure Control” on page 9).

7. If using a different power supply from the one that was provided, wire a 2-pole captive

screw plug to the external power supply (see “Wiring the Power Connector” on
page 6).

8. SW4 USB Plus only: If desired, attach a keyboard, a mouse, or both to output ports

3 or 4, and set the appropriate DIP switches for host emulation (see “Host Emulation

[SW4 USB Plus Only]” in the “Operation” section).

9. Power on the USB peripheral devices, if applicable.

10. Power on the SW USB switcher.

11. Power on the host devices.

SW USB Series • Installation 4

Rear Panel Features

1

USB SWITCHED INPUT

POWER

12V

0.7A MAX

PC 1

+

SW2 USB Rear Panel

7

USB SWITCHED INPUT

POWER

12V

0.7A MAX

PC 1

+

SW4 USB Rear Panel

7

USB SWITCHED INPUT

POWER

12V

0.7A MAX

PC 1

+

2

3

MOUSE

ON

OFF

KEYBOARD

RS-232

Tx Rx

CONTACT

Tx

RS-232

PASS THRU

2

1

4

2

3

RS-232

Tx Rx

CONTACT

Tx

2

1

3

4

RS-232

PASS THRU

4

3

2

RS-232

Tx Rx

Tx

RS-232

PASS THRU

CONTACT

1

2

3

4

ON

1 2

USB OUTPUT HUB

PC 2

USB 1

USB 3

USB 2

USB 4

6

1

USB OUTPUT HUB

PC 2

PC 4

PC 3

USB 1

USB 3

USB 2

USB 4

6

1

USB OUTPUT HUB

PC 2

PC 4

PC 3

USB 1

USB 2

EMULATION

USB 3

USB 4

HOST

SW4 USB Plus Rear Panel

7

6

4

5

a Input connectors — Connect host devices, such as computers, to these female USB

type B connectors, using cable lengths of up to 15 feet (4.5 m). Pinouts for these
connectors follow the standard pinout defined in USB standards.

b RS-232 port — Connect a host computer or control system to this 3-pole, 3.5 mm

captive screw connector for RS-232 control and status feedback (see “Wiring for

RS-232 Communication” on page 8). This port can also be used to update firmware.

NOTE: The computer that you use for RS-232 control should not be one of the

host devices connected to any of the input ports.

c Contact port — If desired, connect a two- or four-button contact closure device to this

3-pole (SW2) or 5-pole (SW4 models), 3.5 mm captive screw connector to enable input

selection via contact closure (see “Setting Up Contact Closure Control” on page 9).

d RS-232 Pass Thru port — If desired, connect an Extron AV switcher to this 3-pole,

3.5 mm captive screw connector (see “RS-232 Pass Thru port” on page 9). Commands
issued via the front panel, contact closure, or an RS-232 interface on a PC or control
system can be sent through this port to the connected AV switcher.

NOTE: Only Extron products can be controlled via this port.

SW USB Series • Installation 5

e Emulation DIP switches — (SW4 USB Plus only) These DIP switches enable host

emulation to a keyboard and mouse connected to output ports 3 and 4. Switch 1

enables host emulation to a mouse; switch 2 enables emulation to a keyboard.

When a keyboard or a mouse is connected to port 3 or 4, and the appropriate switch

is set to On, the SW USB Plus switches to the connected keyboard or mouse instantly,

without the delay that normally occurs while the computer recognizes a new peripheral
device.

f Output connectors — Connect peripheral USB devices, such as keyboards, mice,

storage drives, or webcams, to these female USB type A connectors, using cable lengths
of up to 15 feet (4.5 m). All outputs supply the 500 mA, 5 V rating defined in USB

standards.

NOTES: • If your SW USB system contains multiple computers, drivers for all

connected peripheral devices should be loaded on all computers.

• The four outputs act as a USB hub. Inputs cannot be routed to specific

USB output connectors. All outputs are simultaneously connected to the

selected input.

• On the SW USB Plus, output ports 3 and 4 can be used for host emulation

with supported keyboards and mice only (see “Host Emulation

[SW4 USB Plus Only]” in the “Operation” section for more information).

g Power connector — Attach the provided external 12 VDC power supply to this 2-pole,

3.5 mm captive screw connector (see “Wiring the Power Connector”).

Wiring the Power Connector

If using an external power supply other than the one provided with the SW USB, you may

need to wire the connector for it.

WARNING: The two power cord wires must be kept separate while the power supply is

To wire the power connector:

1. Cut the DC output cord of the power supply to the length needed.

2. Strip the jacket to expose 3/16 inch (5 mm) of the conductors.

CAUTION: Exposing more than 3/16 inch (5 mm) of the copper wires could allow

3. Slide the exposed leads into a 2-pole captive screw plug and secure them by tightening

the screws, using a small screwdriver.

4. To verify the polarity of the power cord before connecting it, plug in the power supply

with no load and check the output with a voltmeter.

plugged in. Remove power before wiring.

the stripped wires to touch each other, causing a short circuit. This could
result in the external DC power supply overheating or burning.

Exposing less than the recommended amount may cause the wires to

slide out of the connector too easily, even if they are tightly pinched by
the captive screws.

SW USB Series • Installation 6