4 Port Professional USB or PS/2
VGA KVM Switch
SV431H
DE: Bedienungsanleitung - de.startech.com
FR: Guide de l'utilisateur - fr.startech.com
ES: Guía del usuario - es.startech.com
IT: Guida per l'uso - it.startech.com
NL: Gebruiksaanwijzing - nl.startech.com
PT: Guia do usuário - pt.startech.com
For the most up-to-date information, please visit: www.startech.com
Manual Revision: 04/12/2012
FCC Compliance Statement
This equipment has been tested and found to comply with the limits for a Class B digital device,
pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection
against harmful interference in a residential installation. This equipment generates, uses and can
radiate radio frequency energy and, if not installed and used in accordance with the instructions,
may cause harmful interference to radio communications. However, there is no guarantee that
interference will not occur in a particular installation. If this equipment does cause harmful
interference to radio or television reception, which can be determined by turning the equipment
o and on, the user is encouraged to try to correct the interference by one or more of the
following measures:
Reorient or relocate the receiving antenna.
Increase the separation between the equipment and receiver.
Connect the equipment into an outlet on a circuit dierent from that to which the receiver is
connected.
Consult the dealer or an experienced radio/TV technician for help.
Use of Trademarks, Registered Trademarks, and other Protected Names and Symbols
This manual may make reference to trademarks, registered trademarks, and other protected
names and/or symbols of third-party companies not related in any way to StarTech.com.
Where they occur these references are for illustrative purposes only and do not represent an
endorsement of a product or service by StarTech.com, or an endorsement of the product(s) to
which this manual applies by the third-party company in question. Regardless of any direct
acknowledgement elsewhere in the body of this document, StarTech.com hereby acknowledges
that all trademarks, registered trademarks, service marks, and other protected names and/or
symbols contained in this manual and related documents are the property of their respective
holders.
Table of Contents
Introduction .......................................................................................................................................................1
Installation............................................................................................................................................................2
PC BIOS Notice ............................................................................................................................................2
Adhesive Rubber Feet ............................................................................................................................3
Console Connection ...............................................................................................................................3
Computer Connection ..........................................................................................................................3
Operations ...........................................................................................................................................................5
Front Panel ....................................................................................................................................................5
Hot Key Commands ................................................................................................................................6
Change Leading Hot Key ....................................................................................................................7
Cascade Conguration ................................................................................................................................7
Connection ...................................................................................................................................................7
Computer Selection by Hot Key Command ............................................................................7
Troubleshooting ...............................................................................................................................................8
Specications .....................................................................................................................................................9
Technical Support ...........................................................................................................................................10
Warranty Information ....................................................................................................................................10
Instruction Manual
i
Introduction
The StarTech.com SV431H, fully compatible with USB specication, is a hybrid USB and PS/2
keyboard/mouse/monitor sharing switch. The SV431H USB switch lets a user manage four
computers by USB or PS/2 interface or a combination of both, from 1 monitor, PS/2 keyboard
and mouse saving you space, time, equipment and money.
Installation is as easy as connecting USB A-B cables or PS/2 cables in between computers and
the SV431H switch. Selecting a computer is as easy as front panel push button pressing or by
entering hotkey commands. The SV431H switch provides the easiest way to manage multiple
USB or PS/2 computers with one PS/2 keyboard, mouse and monitor. No more tangled cables
and messy working environments
Features
• Manage 4 PCs with USB or PS/2 interfaces from one PS/2 keyboard, mouse or monitor.
• Front panel push buttons and hotkey commands for easy computer selection.
• No drivers needed for keyboard and mouse operation.
• Support keyboard and mouse operation.
• High VGA resolution: 1920 x 1440.
• Buzzer sound for computer switching conrmation.
• Activate Auto Scan by front button pressing.
• Selectable Scan Time interval.
• Support the latest DDC2B VGA monitor.
• Saves time, space, equipment and power.
• No software required.
Instruction Manual
1
Installation
PC BIOS Notice
The following BIOS setup changes are necessary for PC users using USB and not necessary for
Mac users:
1. In STANDARD CMOS, set HALT ON ERROR to ALL BUT KEYBOARD.
2. In PNP AN PCI SETUP, set PNP OS INSTALLED to YES and set USB IRQ to ENABLE.
3. For newer computers: in INTEGRATED PERIPHERALS, set USB CONTROLLER and KEYBOARD
SUPPORT to ENABLE.
Also make sure that USB is properly selected in Device Manager under Control Panel, as shown
below.
Note: The SV431H is applicable for USB keyboard and mouse. Switching from one computer
to the next is equivalent to unplugging the USB device from one computer and plugging it to
another. Some USB drivers check attached USB peripherals all the time and do not accept plugn-play function.
Instruction Manual
2
Adhesive Rubber Feet
For desktop operation, you may stick the four round rubber feet (supplied with the unit) to the
bottom of the StarView. Do not use the rubber feet with the rack mount option.
Console Connection
Before installation make sure all devices and computers to be connected to the SV431H have
been turned o.
Plug you monitor to the consoles VGA port; connect the PS/2 mouse and keyboard to the
console port marked with a mouse and a keyboard as shown in gure below.
Computer Connection
Use a HDB15 male-to-female cable to connect from your computers VGA port to the SV431H
VGA port as shown on the following page.
For USB computers: Use a USB A-B cable to connect from one of the SV431H PC ports to the USB
port on the corresponding computer (series A connector), as shown on the following page.
Instruction Manual
3
For PS/2 computers: Connect a PS/2 Y-adapter, which comes with the unit, to the SV431H PS/2,
then use two mini-DIN6 male-to-male cables for keyboard and mouse, see gure below. There
are two mini-DIN6 female connectors on the PS/2 Y-adapter marked as keyboard and mouse. Be
sure not to swap the connections.
Instruction Manual
4
For notebook computers: In most cases, all you need is one PS/2 male-to-male cable connected
between the SV431H and your Notebook; the Y-adapter is not necessary. However, some
Notebook computers do not follow industry-standard, please check your Notebook users
manual for details.
You can now turn on all devices and computers.
Note: Do use both PS/2 and USB of a PC port on the SV431H at the same time. Only the USB port
will eective if this occurs.
Operations
Front Panel
• Online LED & Selected LED
When the LED turns green, the connected computer is powered-on.
When a computer is selected, its corresponding red LED illuminates.
• Push buttons
Each computer has a button associated with it on the front panel for selection.
• K/M Reset
K/M Reset solves most problems developed by keyboard, mouse, device replacement or change
of conguration. Press both of the front-panel number 1 and 2 push buttons for 2 seconds to
re-congure the whole system without turning either the SV431H or any computer o.
• Auto Scan
Auto Scan automatically scans through computers one by one in a xed intervals. The SV431H
provides an easy to use feature to start Auto Scanning. You can press down both the front-panel
number 3 and 4 buttons for 2 seconds to start Auto Scanning.
Note: Computers using a USB keyboard and mouse are not immediately operable when selected
during Auto Scan. Wait for about three seconds after switching to a USB computer, then use the
keyboard and mouse.
Instruction Manual
5
Hot Key Commands
Hot Key commands are short keyboard sequences used to select a computer, to activate
computer scan, etc. The SV431H interprets keyboard strokes for Hot Keys all the time. A Hot Key
sequence starts with 2 left Ctrl keystrokes followed by 1 or 2 more key strokes. A built-in buzzer
generates a high-pitch beep for correct hot key commands; otherwise, one low-pitch beep for an
error and the bad key sequence will not be forwarded to the selected computer.
L-Ctrl: is the Ctrl key located at the left side of the keyboard.
1~4: are the numbers 1 ~ 4 at the upper row of the keyboard.
Do not use the keypad at the right of the keyboard.
• To select a computer by hot key command, you must know its port address, which is
determined by the SV431H connection at the back.
Left Ctrl + Left Ctrl + 4
Selects a computer connected to the PC port 4.
• To start Auto Scan, which will automatically scan power-on computers one by one at a xed
interval:
Left Ctrl + Left Ctrl + F1
When Auto Scan detects any keyboard or mouse activity, it suspends the scanning until activity
stops; it then resumes with the next computer in sequence. The length of the Auto Scan interval
(Scan Rate) is adjustable. To abor t the Auto Scan mode, press the left Ctrl key twice.
• Manual Scan enables you to manually switch back and forth between power-on computers.
Left Ctrl + Left Ctrl + F2
Press á or â to select the previous or the next computer in sequence. Press any other key to
abort the Manual Scan.
• To adjust the Scan Rate which sets the duration before switching to the next computer in
Auto Scan:
Left Ctrl + Left Ctrl + F3
The SV431H sends one to four beeps indicating scan intervals of 3, 8, 15 and 30 seconds
respectively.
• To adjust keyboard typematic rate (characters/sec), this setting over-rides that of the BIOS
and any operating system:
Left Ctrl + Left Ctrl + F4
The Sv431H generates 1 to 4 beeps corresponding to 10, 15, 20 and 30 characters/sec
respectively.
Instruction Manual
6
Change Leading Hot Key
The default leading hotkey sequence involves pressing the left Ctrl twice in succession
(e.g. Left Ctrl>, Left Ctrl). This can be changed to the right Ctrl key instead, to avoid accidental
activation due to using the left Ctrl key for functions such as Copy/Paste.
To change the leading hotkey sequence to Right Ctrl :
Left Ctrl + Left Ctrl + hold Alt + press Right Ctrl
All hotkey commands that previously required pressing the Left Ctrl will be switched to requiring
the right Ctrl instead.
To change the leading hotkey sequence back to Left Ctrl:
Right Ctrl + Right Ctrl + hold Alt + press Left Ctrl
Cascade Conguration
Connection
Before connecting a device (a computer or any other SV431H) to the master under power, you
must turn o the devices. Only the PS/2 ports are operable for cascade operation.
Computer Selection by Hot Key Command
The rst digit is the port address of the Master unit (1~4) and the second digit is the port address
of the Slave (1~4). Please note that only the Master’s PS/2 ports can be connected to a Slaves
Console port.
Left Ctrl + Left Ctrl + 1 + 3
Selects a computer connected to PS/2 port 3 of a Slave connected to PS/2 port 1 of the Master.
Instruction Manual
7
Troubleshooting
Ensure that all cables are well seated. Label the cable for each computer to avoid confusion
when connecting to the SV431H.
Key Possible causes Solutions
Keyboard or mouse does
not work
Keyboard or mouse does
not work after switching
to a dierent USB
computer.
Computer hangs
up while switching
computers.
Auto Scan does not
switch PCs automatically
and the SV431H beeps.
• In Auto Scan,
computers using USB
keyboard and mouse
are not operable.
• Too many keyboard
or mouse drivers
installed.
The USB computer
does not support plugand-play as specied
by the USB standard.
USB computer
initialization takes too
much time.
All PCs are o or only
one PC is turned on.
Scan mode works for
power-on computers
only.
• Press any front button to
select a computer, then use
the keyboard and mouse.
• Remove all unnecessary
keyboard and mouse
drivers.
Update that computer’s
USB driver. Device hot
plug-and-play is one of the
basic USB specications
Wait at least 5 second
before switching from one
USB computer to another
to ensure proper USB
communication
Turn computers on.
Instruction Manual
8
Specications
No. of Computer Supported 4
Front Panel Push Button 4
Hot Plug-and-Play Yes, PC USB Console only
Automatic Scan Interval 3, 8, 15, 30 seconds
30M (100ft) for VGA
Cable Length (Max)
Computer Online LED 4
Computer Selected LED 4
VGA 1920 x 1440 DDC2B
Computer Peripheral Connector Monitor
Console Peripheral Connector Monitor
Weight (g)
(oz.)
H x W x D (mm)
(in.)
Size
5M (15ft) for USB
30M (90ft) for PS/2
USB Type B x 4, PS/2 x 3
HDB-15 male x 4
PS/2 x 2
HDB-15 female x 1
90
31.74
44 x 220 x 130
1.7 x 8.7 x 5.1
Compact
Instruction Manual
9
Technical Support
StarTech.com’s lifetime technical support is an integral part of our commitment to provide
industry-leading solutions. If you ever need help with your product, visit www.startech.com/
support and access our comprehensive selection of online tools, documentation,
and downloads.
Warranty Information
This product is backed by a three year warranty.
In addition, StarTech.com warrants its products against defects in materials and workmanship for
the periods noted, following the initial date of purchase. During this period, the products may
be returned for repair, or replacement with equivalent products at our discretion. The warranty
covers parts and labor costs only. StarTech.com does not warrant its products from defects or
damages arising from misuse, abuse, alteration, or normal wear and tear.
Limitation of Liability
In no event shall the liability of StarTech.com Ltd. and StarTech.com USA LLP (or their ocers,
directors, employees or agents) for any damages (whether direct or indirect, special, punitive,
incidental, consequential, or otherwise), loss of prots, loss of business, or any pecuniary loss,
arising out of or related to the use of the product exceed the actual price paid for the product.
Some states do not allow the exclusion or limitation of incidental or consequential damages. If
such laws apply, the limitations or exclusions contained in this statement may not apply to you.
Instruction Manual
10
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