®
®
NETWORK SERVICES
ACU5501A-R4 ACU5501A-R3 ACU5501A-R2 ACU5502A-R3 ACU5502A-R2
ServSwitch Wizard DVI/USB SRX™
Extend one or two* quality DVI video links plus
four USB devices up to nearly 200 feet (60m) from
your computer.
Uses one or two* lengths of Category 5e, 6 or 7 twisted-pair cable.
* Dual-variant models
Customer
Support
Information
Order toll-free in the U.S.: Call 877-877-BBOX (outside U.S. call 724-746-5500)
FREE technical support 24 hours a day, 7 days a week: Call 724-746-5500 or fax 724-746-0746
Mailing address: Black Box Corporation, 1000 Park Drive, Lawrence, PA 15055-1018
Web site: www.blackbox.com • E-mail: info@ blackbox.com
ServSwitch Wizard DVI/USB SRX
Trademarks Used in this Manual
Black Box and the Double Diamond logo are registered trademarks, and ServSwitch is a trademark, of BB Technologies, Inc.
Mac is a registered trademark of Apple Computer, Inc.
Linux is registered trademark of Linus Torvalds.
Windows is a registered trademark of Microsoft Corporation.
NetWare is a registered trademark of Novell, Inc.
Sun is a trademark of Sun Microsystems, Inc.
Unix is a registered trademark of UNIX System Laboratories, Inc.
BSD is a registered trademark of UUNet Technologies, Inc.
Any other trademarks mentioned in this manual are acknowledged to be the property of the trademark owners.
We‘re here to help! If you have any questions about your application
or our products, contact Black Box Tech Support at 724-746-5500
or go to blackbox.com and click on “Talk to Black Box.”
You’ll be live with one of our technical experts in less than 30 seconds.
Page 2
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FCC and IC RFI Statements
Federal Communications Commission and Industry Canada Radio Frequency Interference
Statements
This equipment generates, uses, and can radiate radio-frequency energy, and if not installed and used properly, that is, in strict
accordance with the manufacturer’s instructions, may cause inter­ference to radio communication. It has been tested and found to
comply with the limits for a Class A computing device in accordance with the specifications in Subpart B of Part 15 of FCC rules,
which are designed to provide reasonable protection against such interference when the equipment is operated in a commercial
environment. Operation of this equipment in a residential area is likely to cause interference, in which case the user at his own
expense will be required to take whatever measures may be necessary to correct the interference.
Changes or modifications not expressly approved by the party responsible for compliance could void the user’s authority to
operate the equipment.
This digital apparatus does not exceed the Class A limits for radio noise emis­sion from digital apparatus set out in the Radio
Interference Regulation of Industry Canada.
Le présent appareil numérique n’émet pas de bruits radioélectriques dépassant les limites applicables aux appareils numériques de
la classe A prescrites dans le Règlement sur le brouillage radioélectrique publié par Industrie Canada.
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ServSwitch Wizard DVI/USB SRX
Instrucciones de Seguridad
(Normas Oficiales Mexicanas Electrical Safety Statement)
1. T odas las instrucciones de seguridad y operación deberán ser leídas antes de que el aparato eléctrico sea operado.
2. Las instrucciones de seguridad y operación deberán ser guardadas para referencia futura.
3. Todas las advertencias en el aparato eléctrico y en sus instrucciones de operación deben ser respetadas.
4. Todas las instrucciones de operación y uso deben ser seguidas.
5. E l aparato eléctrico no deberá ser usado cerca del agua—por ejemplo, cerca de la tina de baño, lavabo, sótano mojado o cerca
de una alberca, etc.
6. El aparato eléctrico debe ser usado únicamente con carritos o pedestales que sean recomendados por el fabricante.
7. El aparato eléctrico debe ser montado a la pared o al techo sólo como sea recomendado por el fabricante.
8. Servicio—El usuario no debe intentar dar servicio al equipo eléctrico más allá a lo descrito en las instrucciones de operación.
Todo otro servicio deberá ser referido a personal de servicio calificado.
9. El aparato eléctrico debe ser situado de tal manera que su posición no interfiera su uso. La colocación del aparato eléctrico
sobre una cama, sofá, alfombra o superficie similar puede bloquea la ventilación, no se debe colocar en libreros o gabinetes
que impidan el flujo de aire por los orificios de ventilación.
10. El equipo eléctrico deber ser situado fuera del alcance de fuentes de calor como radiadores, registros de calor, estufas u otros
aparatos (incluyendo amplificadores) que producen calor.
11. E l aparato eléctrico deberá ser connectado a una fuente de poder sólo del tipo descrito en el instructivo de operación, o como
se indique en el aparato.
12. Precaución debe ser tomada de tal manera que la tierra fisica y la polarización del equipo no sea eliminada.
13. Los cables de la fuente de poder deben ser guiados de tal manera que no sean pisados ni pellizcados por objetos colocados
sobre o contra ellos, poniendo particular atención a los contactos y receptáculos donde salen del aparato.
14. El equipo eléctrico debe ser limpiado únicamente de acuerdo a las recomendaciones del fabricante.
15. E n caso de existir, una antena externa deberá ser localizada lejos de las lineas de energia.
16. El cable de corriente deberá ser desconectado del cuando el equipo no sea usado por un largo periodo de tiempo.
17. Cuidado
debe ser tomado de tal manera que objectos liquidos no sean derramados sobre la cubierta u orificios de ventilación.
18. Servicio por personal calificado deberá ser provisto cuando:
A: El cable de poder o el contacto ha sido dañado; u
B: Objectos han caído o líquido ha sido derramado dentro del aparato; o
C: El aparato ha sido expuesto a la lluvia; o
D: El aparato parece no operar normalmente o muestra un cambio en su desempeño; o
E: El aparato ha sido tirado o su cubierta ha sido dañada.
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Table of Contents
Contents
1. Specifications............................................................................................................................................................................... 6
1.1 Compatibility...................................................................................................................................................................... 6
2. Overview..................................................................................................................................................................................... 7
3. Installation................................................................................................................................................................................... 8
3.1 Mounting the modules – desk or rack............................................................................................................................... 8
3.1.1 Desk mount........................................................................................................................................................... 8
3.1.2 Rack mount........................................................................................................................................................... 9
3.2 Connections.................................................................................................................................................................... 10
3.2.1 Connections at the local module......................................................................................................................... 10
3.2.2 Connections at the remote module.....................................................................................................................15
4. Operation.................................................................................................................................................................................. 20
4.1 General use...................................................................................................................................................................... 20
4.2 Video display (EDID) information..................................................................................................................................... 20
4.3 HDMI 1.3a operation....................................................................................................................................................... 20
4.4 Power and activity indicators........................................................................................................................................... 21
Appendix A. Troubleshooting........................................................................................................................................................ 22
A.1 No video image is displayed on the remote monitor........................................................................................................ 22
Appendix B. Safety Information..................................................................................................................................................... 23
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ServSwitch Wizard DVI/USB SRX
1. Specifications
Approvals:
CE, FCC
Hardware Compatibility: All computers with DVI digital video and USB interfaces
Software Compatibility: Operates with all known software and operating systems including
Windows®, Linux®, Unix®, BSD, all Sun® OS, all Mac® OS, NetWare®, etc.
Connectors:
Single-variantDual-variant
(local transmitter)
Video: DVI-D female
2 x DVI-D female
USB:
USB Type B female
2 x USB Type B female
Audio:
1 x 3.5mm jack socket
2 x 3.5mm jack socket
Other: RJ-45 CATx link socket
2 x RJ-45 CATx link socket
Power jack
Power jack
Connectors:
Video: (remote receiver)
USB:
Audio:
Other: DVI-D female
(4) USB Type A female
1 x 3.5mm jack socket
RJ-45 CATx link socket
Power jack
2 x DVI-D female
2 x USB Type B female
2 x 3.5mm jack socket
2 x RJ-45 CATx link socket
Power jack
Operating Temperature: 32 to 104°F (0 to 40°C)
Power adapter(s):
Input: Output:
100–240 VAC, 50/60 Hz
DC jack (5VDC output)
Local unit
Dimensions
(w): (h): (d):
Single-variantDual-variant
120mm (4.66”)
120mm (4.66”)
26mm (1.02”)
48mm (1.88”)
75mm (2.94”)
75mm (2.94”)
Weights: 0.34kg (0.75lbs)
0.5kg (1.1lbs)
Power requirements:
450mA @ 5VDC
1.7A @ 5VDC
Remote unit
Dimensions
(w): (h): (d):
Single-variantDual-variant
163.4mm (6.43”)
120mm (4.66”)
26mm (1.02”)
48mm (1.88”)
74.8mm (2.94”)
75mm (2.94”)
Weights: 0.43kg (0.95lbs)
0.5kg (1.1lbs)
Power requirements:
1A @ 5VDC
2.5A @ 5VDC
1.1 Compatibility
Please note that ACU5501A-R4 is not compatible with earlier versions ACU5501A-R3 or ACU5501A-R2. Similarly, ACU5502A-R3
is not compatible with earlier version ACU5502A-R2. In practice this means that you must ensure that both ends of an extender
pair (local and remote modules) are at the same revision level.
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Chapter 2: Overview
2. Overview
Thank you for choosing the ServSwitch Wizard DVI/USB SRX extenders. These compact modules present the quickest way to
extend high quality DVI digital video plus USB keyboard and mouse (plus on dual variants, a second digital video channel and
two stereo audio channels) with an additional 2 USB peripherals up to 196 feet (60 meters) away from your computer.
Thanks to our long involvement and investment in extender technology we have succeeded in overcoming the numerous problems associated with extending digital video signals. Using our proprietary transmission techniques the ServSwitch Wizard DVI/
USB SRX (and dual) modules can reliably transfer video rates up to 165 Mpixels per second. This is in addition to two USB channels for keyboard and mouse - all via the same single length of Category 5e, 6 or 7a twisted pair cabling.
The ServSwitch Wizard DVI/USB SRX extenders have been designed to be quick to install and totally transparent in operation.
(24AWG)
ServSwitch Wizard DVI/USB SRX
link with direct cable connection
(24AWG)
ServSwitch Wizard DVI/USB SRX link with
cable and patch panel connections
Cable distance rules
• Extension distances up to 196 feet (60 m) are
supported.
• Extensions of 196 feet (60 m) may be achieved with
uninterrupted runs of recommended cable (Black Box
CAT7a patch cable) at full resolution.
• Extensions of 180 feet (55 m) may be achieved with
uninterrupted runs of CAT6 bulk/trunk
(not patch) cable at full resolution.
• The overall cable run(s) must be reduced by 16 feet
(5 m) for each additional cable coupling.
• Black Box does not recommend CAT5e cables for use
with this product. However, 147 feet (45 m) may be
typically achieved with uninterrupted runs of CAT5e
bulk/trunk (not patch) cable at full resolution.
• The run specification may be increases by 32 feet (10
m) when using resolutions of 1280 x 1024 or lower.
• All patch cables should be as short as possible and
should be no longer than 6.6 feet (2 m).
• It is recommended that Black Box CAT7a patch cables
are used for maximum performance.
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ServSwitch Wizard DVI/USB SRX
3. Installation
3.1 Mounting the modules – desk or rack
The ServSwitch Wizard DVI/USB SRX modules can be situated on a desk or alternatively, for larger installations, mounted within
an optional rack mount chassis.
3.1.1 Desk mount
Apply the supplied self-adhesive rubber feet to the underside of the module as shown in Figure 3-1:
Figure 3-1. Applying the supplied self-adhesive rubber feet to the underside of the module
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Chapter 3: Installation
3.1.2 Rack mount
Note: The module switches are not accessible once it is inserted into the rack, therefore, check all settings before insertion.
1 Place the rack securing plate (available as a separate kit) onto the front of the module and secure it with the two countersunk
screws.
2 Orient the ServSwitch Wizard DVI/USB SRX module on its side so that its labeled face is the correct way up.
3 Slide the module into the required rack position. The rectangular cut-out in the front upper lip of the rack allows the two
screws on the module’s upper edge to slide through.
4 The rack mount chassis has a series of holes in its floor that are spaced to accommodate the two screws on the module’s lower
edge. Ensure that the screws correctly locate into the two holes of the chosen slot. The rack securing plate on the module
should now be flush with the front of the rack mount chassis.
5 Use the third (pan-head) screw, in the top hole of the rack securing plate to fasten the module to the rack as shown in Figure
3-2:
RE
MO
TE
PO
W
ER
Se
rv
Sw
B
L
it
A
C
c h™
K
W
B
iz
O
X
ar
d
K
V
DV
M
I/
E
U
X
T
SB
E
N
TO
SR
D
E
X
R
LIN
K
LO
CA
L
ON
Figure 3-2. Fixing the module into the rack
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ServSwitch Wizard DVI/USB SRX
3.2 Connections
Installation of the ServSwitch Wizard DVI/USB SRX modules is straightforward and requires minimal configuration in most cases.
• Connections at the local module
• Connections at the remote module
Note: After all connections are made, power up the monitor connected to the remote module, then power up the remote module and finally switch on the computer connected to the local module.
3.2.1 Connections at the local module
iz
ar
3.2.1.1 Video connections
K
V
d
VI
DM
1 Use the supplied DVI/D link cable to connect the DVI input socket of the local module to the digital video output socket of the
computer as shown in Figure 3-3:
E
/ UX
T
S BE
N
S RD
E
X
R
TO
K
LIN
TE
MO
ON
RE
K
h™
WB
O
iz
X
ar
K
V
d
DV
M
I /E
X
U
T
S BE
N
S RD
TO
E
X
R
K
LIN
TE
MO
ON
RE
[Dual-variant only] Optionally attach a second video
input from the computer system using the supplied
DVI/D link cable.
tc
Figure 3-3. Attaching the DVI/D video link cable
B
A
To secondary video
output port
To primary video
output port
Figure 3-4. Attaching two DVI/D video link cables to the dual-variant local module
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Chapter 3: Installation
3.2.1.2 USB connections
1 Use the supplied USB cable to link the USB socket of the local module to a vacant USB socket on the computer as shown in
L
CA
Figure 3-5:
LO
W
PO
ER
Se
rv
Sw
B
Figure 3-5. Attaching the USB link cable
[Dual-variant only] Optionally attach a second USB
connection from the computer system using the
supplied USB cable.
L
CA
LO
IN
Feeds the UPPER two USB
sockets on the remote unit
W
PO
ER
Se
Feeds the LOWER two USB
sockets on the remote unit
Figure 3-6. Attaching two USB link cables to the dual-variant local module
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ServSwitch Wizard DVI/USB SRX
za
r dK
3.2.1.3 Link connections
V
1 Connect the link cable (see Overview page for cable advice) to the local module socket labeled TO REMOTE as shown in Figure
3-7:
VI
DM
E
/ UX
T
S BE
N
S RD
E
X
R
TO
K
LIN
TE
MO
ON
RE
Figure 3-7. Attaching the CATx link cable
h™
t cC K
WB
O
iz
X
ar
[Dual-variant only] Attach a second category 5e, 6 or
7a link cable (up to 60 metres in length) to the upper
socket on the dual-variant local module.
K
V
d
DV
M
I /E
X
U
T
S BE
N
S RD
E
X
R
TO
K
LIN
TE
MO
ON
RE
B
A
Secondary CATx link cable
Primary CATx link cable
Figure 3-8. Attaching two CATx link cables to a dual-variant local module
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Chapter 3: Installation
3.2.1.4Audio connections (ACU5501A-R3 & -R4 only)
Optionally link a audio input to the local module using a 3.5mm audio cable.
L
CA
LO
T
OU
W
PO
ER
r
Se
w
vSB
Figure 3-9. Attaching an audio link to the local module (ACU5501A-R3 & -R4 only)
3.2.1.5Audio connections (dual-variants only)
Optionally link one or two stereo audio inputs to the local module using 3.5mm audio cable(s). One 3.5mm audio cable is supplied with dual-variant packages.
L
CA
LO
IN
W
PO
ER
Se
r
To secondary audio port
To primary audio port
Figure 3-10. Attaching two audio links to a dual-variant local module
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ServSwitch Wizard DVI/USB SRX
3.2.1.6 Power connections (optional)
The local module is designed to derive its power from the host computer via the USB connection (two connections for the dual
variant). If this is not possible, then you will need to use one or two optional Black Box power adapters.
L
1 Connect the output lead of the optional power adapter(s) to the socket(s) labeled
‘POWER‘ on the local module as shown in
CA
LO
Figures 3-11 and 3-12:
W
PO
ER
Se
rv
Sw
B
Single-variant local module:
Use an optional power adapter
only if powering from the host
(via USB) is not possible.
Figure 3-11. Attaching the power adapter connection to the single variant local module
L
CA
LO
IN
W
PO
ER
Se
r
Dual-variant local module: Use
two optional power adapters
only if powering from the host
(via dual USB connections ) is
not possible.
Do not use squid cables or
power splitters. Two separate
power adapters must be used.
Figure 3-12. Attaching the power adapter connections to the dual variant local module
2 Insert the IEC connector of the separate power cord(s) into the corresponding socket(s) of the power adapter(s). Connect the
other end of the power cord to one/two nearby mains socket(s).
Note: After all connections are made, power up the monitor and the REMOTE module first (followed by the LOCAL module, if
using the dual-variant with power adapters) and then switch on the computer.
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Chapter 3: Installation
3.2.2 Connections at the remote module
iz
ar
3.2.2.1 Video connections
K
d
V
1 Connect the DVI/D lead from the video monitor to the DVI output socket of the remote module as shown in Figure 3-13:
VI
DM
E
/ UX
T
S BE
N
S RD
E
X
R
TO
K
LIN
L
CA
LO
ON
Figure 3-13. Attaching the DVI/D video monitor cable
h™
t cC K
WB
O
iz
X
ar
K
V
d
DV
M
I /E
[Dual-variant only] Optionally attach a second DVI video monitor.
X
U
T
S BE
N
S RD
E
X
R
TO
K
LIN
L
CA
LO
ON
B
A
To secondary video
monitor
To primary video
monitor
Figure 3-14. Attaching primary and secondary DVI/D video monitor cables to the dual-variant remote module
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ServSwitch Wizard DVI/USB SRX
3.2.2.2 USB connections
1 Connect the leads from the keyboard and mouse to two of the USB sockets on the remoteTmodule
as shown in Figure 3-15:
E
MO
RE
Note: It is not important
which of the four sockets
are used.
W
PO
ER
Se
rv
Sw
B
Figure 3-15. Attaching the keyboard and mouse USB cables
IMPORTANT: The total current that may be drawn from the USB ports is 1.2A, which should be sufficient for a keyboard,
mouse (no more than 100mA each) and any two other devices (500mA maximum each). If more power for USB devices is
required, please use a powered USB hub.
[Dual-variant only] Connect the leads from the keyboard and
mouse to the two USB sockets on the remote module.
TE
MO
RE
Fed from the UPPER socket
on the local unit
T
OU
W
PO
ER
Se
rv
Fed from the LOWER socket
on the local unit
Figure 3-16. Attaching the keyboard and mouse USB cables to the dual-variant remote module
2 Where other USB peripherals are also required, connect up to two other leads to the remaining USB sockets.
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Chapter 3: Installation
iz
ar
3.2.2.3 Link connections
K
V
d
VI
DM
1 Connect the link cable (see Overview page for cable advice) to the remote module socket labeled TO LOCAL as shown in Figure
3-17:
E
/ UX
T
S BE
N
S RD
E
X
R
TO
K
LIN
L
CA
LO
ON
Figure 3-17. Attaching the CATx link cable
tc
[Dual-variant only] Attach a second category 5e, 6 or 7a link
cable (up to 60 metres in length) to the upper socket on the
dual-variant remote module.
K
h™
WB
O
iz
X
ar
K
V
d
DV
M
I /E
X
U
T
S BE
N
S RD
E
X
R
TO
K
LIN
L
CA
LO
ON
B
A
Secondary CATx link cable
Primary CATx link cable
Figure 3-18. Attaching the CATx link cables to the dual-variant remote module
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ServSwitch Wizard DVI/USB SRX
3.2.2.4 Speaker connections (ACU5501A-R3 & -R4 only)
TE
Optionally link stereo speakers to the remote module using 3.5mm audio cable.REMO
T
OU
W
PO
r
Se
ER
w
vSB
Figure 3-19. Attaching speakers to the remote module (ACU5501A-R3 & -R4 only)
3.2.2.5 Speaker connections (dual variants only)
Optionally link one or two stereo speakers to the remote module using 3.5mm audio cable(s).
L
CA
LO
IN
W
PO
To secondary speakers
To primary speakers
ER
Se
r
Figure 3-20. Attaching two sets of speakers to a dual-variant remote module
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Chapter 4: Operation
3.2.2.6 Power connections
TE
O
1 Connect the output lead of the supplied power adapter to the socket labeledREM‘POWER
‘ on the remote module as shown in
Figures 3-21 and 3-22:
W
PO
ER
r
Se
w
vSB
Figure 3-21. Attaching the power adapter connection
TE
MO
RE
T
OU
W
PO
ER
Se
rv
Figure 3-22. Attaching the power adapter connection on the dual-variant remote module
2 Insert the IEC connector of the separate power cord into the corresponding socket of the power adapter. Connect the other
end of the power cord to a nearby mains socket.
3 After all connections are made, power up the monitor and remote module and then switch on the computer.
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ServSwitch Wizard DVI/USB SRX
4. Operation
4.1 General use
In use, the ServSwitch Wizard DVI/USB SRX modules should be transparent - the system and its peripherals should operate exactly
as normal, the only difference being that they are now up to 196 feet (60 meters) apart.
4.2 Video display (EDID) information
Extended Display Identification Data (or EDID) is an industry standard scheme which allows video monitors to declare their capabilities to the computer’s video adapter circuitry, allowing the latter to optimise their outputs accordingly. Since the widespread
adoption of the scheme, video adapters have become increasingly dependent on receiving relevant EDID information during startup, before they will output anything more than a rudimentary video signal.
Each time that the remote module is powered on, it attempts to read the EDID information from the connected DVI video monitor. If the attempt is successful, the information is transferred to the local module and stored within non-volatile memory. This is
information is then made available to the computer’s video adapter when required.
On dual-variants, EDID is handled independently for the two video connections, allowing completely different video display
configurations on the two ports.
4.3 HDMI 1.3a operation
Using optional HDMI to DVI converter cables, the dual-variant ServSwitch Wizard DVI/USB SRX can support HDMI video and
audio up to the 165MHz clock rate (1920 x 1080 at 60Hz, 24-bit colour).
Eight channels of HDMI audio are supported with sample sizes of 16, 20 or 24-bits at 32KHz, 44.1kHz, 48kHz, 88.2kHz,
96kHz, 176.4kHz, or 192kHz (simultaneously with the jack audio).
Note: The High-bandwidth Digital Content Protection (HDCP) and Consumer Electronics Control (CEC) schemes are not supported.
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Chapter 4: Operation
4.4 Power and activity indicators
Each module provides two indicators to confirm power status and also feedback about the various input signals: U
Local module
Green:
SB
N
S RD
E
X
R
TO
• On when power is present.
K
LIN
TE
MO
ON
RE
Yellow:
• On when a valid DVI video input signal is being received
from the computer.
• Off when the CATx link cable is disconnected.
Remote module
U
Green:
• On when power is present.
Yellow:
• On when a valid DVI video input signal is being received
from the local module.
Flashes regularly (twice per second) when no valid DVI
video signal is being received from the local module.
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Page 21
SB
N
S RD
TO
E
X
R
K
LIN
L
CA
LO
ON
ServSwitch Wizard DVI/USB SRX
Appendix A. Troubleshooting
A.1 No video image is displayed on the remote monitor
• Check the yellow indicators on the local and remote modules while no keys are pressed on the keyboard and no mouse movements are being made - both indicators should be continually on when a valid video signal is present.
LOCAL: If the yellow indicator is giving a regular flash (twice per second), then the video feed to the local module is not valid.
Try connecting a DVI monitor (preferably using the same DVI link cable as used with the local module) directly to the computer
and check for a correct image.
REMOTE: If the yellow indicator is giving a regular flash (twice per second), then the video feed via the link cable is not valid. If
the link cable is long, try using a short link cable temporarily to check for basic operation.
If the yellow indicators are off, then the link cable is not properly connected.
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Appendices
Appendix B. Safety Information
• For use in dry, oil free indoor environments only.
• Do not use to link between buildings.
• Ensure that the twisted pair interconnect cable is installed in compliance with all applicable wiring regulations.
• Do not connect the CATx link interface (RJ45 style connector) to any other equipment, particularly network or telecommunications equipment.
• Warning – the power adapter contains live parts.
• No user serviceable parts are contained within the power adapter - do not dismantle.
• Plug the power adapter into a grounded socket outlet close to the unit that it is powering.
• Replace the power adapter with a manufacturer approved type only.
• Do not use the power adapter if the power adapter case becomes damaged, cracked or broken or if you suspect that it is not
operating properly.
• If you use a power extension cord with the units, make sure the total ampere rating of the devices plugged into the extension
cord do not exceed the cord’s ampere rating. Also, make sure that the total ampere rating of all the devices plugged into the
wall outlet does not exceed the wall outlet’s ampere rating.
• Do not attempt to service the units yourself.
• The units and power supplies can get warm in operation – do not situate them in an enclosed space without any ventilation.
• The units do not provide ground isolation and should not be used for any applications that require ground isolation or galvanic
isolation.
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