• Switches Between 2 PC Video and Audio Signals
• Loop-output for Input #1
• Manual or Auto Switching Based on Active Video
• RS-232 Serial Control
2x1 Compact VGA Switch w/ Audio
AC505A-2A
Order toll-free in the U.S. 24 hours, 7 A.M. Monday to midnight Friday: 877-877-BBOX
FREE technical support, 24 hours a day, 7 days a week: Call 724-746-5500 or fax 724-746-0746
Mail order: Black Box Corporation, 1000 Park Drive, Lawrence, PA 15055-1018
Web site: www.blackbox.com • E-mail: info@blackbox.com
CUSTOMER
SUPPORT
INFORMATION
UMA1123
Rev C
2x1 Compact VGA Switch w/ Audio
1
Trademarks Used in this Manual
BLACK BOX and its logo are registered trademarks of Black Box
Corporation. HDMI is a registered trademark of HDMI Licensing LLC.
Any other trademarks mentioned in this manual are acknowledged to be the
property of the trademark owners.
FCC and Canadian Dept of Communications 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 their 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 the Canadian Department of Communications.
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 le ministère des Communications du Canada.
European Union Declaration of Conformity
This product complies with the requirements of the European EMC
directive 89/336/EEC
Model AC505A-2A
2
Normas Oficiales Mexicanas (NOM)
Electrical Safety Statement
INSTRUCCIONES DE SEGURIDAD
1. Todas 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. El 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. El 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. En 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.
.
2x1 Compact VGA Switch w/ Audio
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Contents
1. INTRODUCTION ........................................................................... 4
1.1 GENERAL ...................................................................................... 4
1.2 FEATURES .....................................................................................4
2. INSTALLATION............................................................................. 5
2.1 REQUIRED CABLES ....................................................................... 5
2.2 INPUTS & OUTPUTS ...................................................................... 5
2.3 CONNECTING THE AC505A-2A....................................................5
2.4 CONNECTION DIAGRAM................................................................ 6
3. CONFIGURATION & OPERATION........................................... 6
3.1 SWITCHED OUTPUT....................................................................... 6
3.2 MODES OF OPERATION ................................................................. 7
3.3 PRIORITY SELECTION IN AUTO MODE........................................... 7
3.4 RS-232 CONTROL......................................................................... 8
4. TROUBLESHOOTING ................................................................ 11
4.1 IN CASE OF TROUBLE................................................................. 11
4.2 CALLING BLACK BOX ................................................................ 11
4.3 SHIPPING AND PACKAGING ........................................................ 11
5. SPECIFICATIONS ....................................................................... 12
Model AC505A-2A
4
1. Introduction
1.1 General
Thank you for purchasing the Black Box AC505A-2A, a 2x1 Compact
VGA Switch with Audio & Serial Control.
This unit provides a video along with audio output that can be switched
between two video and audio sources. The unit also has a loop-out for
input #1 for connection to a local LCD.
The AC505A-2A unit provides all the A/V and control connections on
the rear panel; the front panel has a push-button switch with
corresponding LED indicator for the selection of video source. The
front panel also features mode selection buttons to allow the unit to
operate automatically (based on video detection). This unit can be
controlled either manually using the front panel switch, automatically
based on video detection, or remotely through an RS232 serial port.
The unit can be configured to operate in two different modes, which
are Auto and Manual modes. There is a priority selection that can be
used to set for none, input #1 or input #2. Switched output can be
blanked and un-blanked either from the front panel button or from the
PC command sending through the serial port.
The unit also has EEPROM (internal non-volatile flash memory) to
store the last operating mode when power is off.
1.2 Features
9 Allows one video with stereo audio to be switched between
two video and audio sources
9 Loop-out for input #1 audio and video
9 Can be manually controlled by front-panel push-buttons or
remotely by RS232 communication port
9 Provides Auto mode to automatically select input source
9 Auto mode priority can be set for input #1, input #2 or no-
priority
9 Switched output can be blanked and un-blanked
9 Stores the last selection and mode in EEPROM
9 Ships with universal (100~240 VAC) power supply
9 Compact, Rugged, Reliable, and Economical
2x1 Compact VGA Switch w/ Audio
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2. Installation
2.1 Required Cables
The video input cables are generally HD15 (VGA) male to male
(customer furnished). The Audio inputs are 3.5 mm mini-stereo (also
customer furnished). If you are going to connect the unit to a Serial
port (such as PC’s COM) you would need a Male/Female DB9 Serial
Cable.
2.2 Inputs & Outputs
The AC505A-2A has 2 video and audio inputs: PC 1 Input and PC 2
Input. The unit has 1 video and audio output: SW Output. There is a
local video and audio output, which is a loop-out for PC 1 Input: Local.
2.3 Connecting the AC505A-2A
Connect your video and audio sources such as computer or notebook
PC to PC 1 Input and PC 2 Input. If the loop-out for input #1 is
desired, it can be connected to local video and audio.
Connect the display device such as a monitor (or a video projector) to
the switched video and audio outputs (SW Output).
Connect the included power supply to the AC505A-2A.
Select the desired mode of operation including the priority for your
video and audio output using the front panel switched buttons. If
preferred, the selection can also be done through RS-232 serial
commands by connecting a DB9 RS-232 Serial cable to your PC and
the AC505A-2A.
Model AC505A-2A
6
2.4 Connection Diagram
3. Configuration & Operation
3.1 Switched Output
The switched output SELECT button is used to select between video &
audio input sources of PC 1 and PC 2. A solid-on LED is used to
indicate which input is selected.
Holding down the switched output SELECT button for 3 seconds will
blank the current selected input source(and mute the audio output).
The LED for the current selected input will start blinking to indicate
the blanking mode. Pressing the SELECT button again will un-blank
the output and un-mute the audio on the switched out.
2x1 Compact VGA Switch w/ Audio
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3.2 Modes of Operation
The unit can operate in either Auto or Manual mode by pressing the
mode button to select it.
In Auto mode, the AC505A-2A will automatically select the input with
active video and audio. The presence of video is determined by
examining the V. Sync signal of the input connectors. The front panel
SELECT button cannot be used to switch between PC 1 and PC 2 input
sources in this mode. However, it can be used to blank the output by
holding it down for 3 seconds or to un-blank the output by pressing it
once.
In Manual mode, the output of the AC505A-2A will depend on the
selection of the switched output SELECT button.
3.3 Priority Selection in Auto Mode
The priority button is used to select the priority as none, input #1, or
input #2. This priority selection only applies to the Auto mode. If INP
1 priority is selected, the AC505A-2A will automatically select input
#1 whenever it detects the presence of video at PC 1 input, regardless
of what is happening at input #2. If INP 2 priority is selected, the VS2A will automatically select input #2 whenever it detects the presence
of video at the PC 2 input, regardless of what is happening at input #1.
For example, if the output is playing the video & audio from PC 2
input and the video from PC 1 input is detected, the output of the
AC505A-2A will select PC 1 (input #1) immediately. With priority set
to none, the unit stays selected to the current input as long as it is
detecting video there.
Model AC505A-2A
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---------------------M E N U
----------------------
1 = PC 1 Input
2 = PC 2 Input
A = Auto mode
M = Manual mode
P = Priority Select
N = No priority
B = Blank
U = Un-blank
S = Status report
L = List menu
3.4 RS-232 Control
The AC505A-2A can also be controlled via a serial device. The unit
operates at a baud rate of 4800 bps. From the serial port, you have full
control over the operation of the switched output, mode, and priority
buttons.
Note on RS-232 port availability on your PC
Most PCs and notebooks do not have a serial port. So to program
the Switch you may need a USB to RS-232 Serial converter. Please
contact your Black Box sales representative if you need to buy one.
The AC505A-2A will output a menu to a serial port on power-up. This
menu will also be displayed when a “List” command is sent to it via a
serial port. To view the menu, An ASCII serial terminal or terminal
emulator software is needed. An example is Microsoft Windows
HyperTerminal (generally found in Accessories\Communication
folder)
. To configure HyperTerminal
- Connect direct to COM1 or COM2
- 4800 Baud, 8 bits, No Parity, 1 Stop bit, No flow control
-
After power-up the unit will output the following menu in ASCII
through its serial port:
2x1 Compact VGA Switch w/ Audio
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Control Codes (1 byte commands from external control device)
ASCII 1 (or Hex 31)
Selects input #1 (immediately and unconditionally). The
device will respond with: PC 1 Input selected
ASCII 2 (or Hex 32)
Selects input #2 (immediately and unconditionally). The
device will respond with: PC 2 Input selected
ASCII A (or Hex 41)
Enters Auto mode. The device will respond with: Auto
mode
In Auto mode, the device automatically switches to the
video & audio input source that is active. “Active”
means that video signal has sync signal, it does not
mean there is a non-static screen!
ASCII M (or Hex 4D)
Enters Manual mode. The device will respond with:
Manual mode
In Manual mode, the device stays on the currently
selected video & audio, regardless of the presence of
video signal.
ASCII P (or Hex 50)
Toggles the Input Priority Selection. The device will
respond with: PC 1 priority selected or PC 2 priority
selected
If input #1 priority is selected, the unit will select input
#1 automatically whenever the presence of the video at
PC 1 input is detected even if the PC 2 input is currently
playing.
Model AC505A-2A
10
Status Report
-------------------------------Input = 1 (or 2)
Mode = Auto (or Manual)
Priority = 1 (or 2 or None)
Blank = On (or Off)
If input #2 priority is selected, the unit will select input
#2 automatically whenever the presence of the video at
PC 2 input is detected even if the PC 1 input is currently
playing.
ASCII N (or Hex 4E)
Selects no priority. The device will respond with: No
priority selected
ASCII B (or Hex 42)
Blanks the output. The device will respond with:
Blanked. When the output is blanked, only the color
intensities of the output are reduced to zero, the unit
still operates in normal fashion and sync signals are still
routed to the output. Audio output is muted.
ASCII U (or Hex 55)
Un-blanks the output. The device will respond with:
Un-blanked
ASCII S (or Hex 53)
Request the status report. The device will respond with:
This report displays the current selection of switched
output, mode, and priority buttons.
ASCII L (or Hex 4C)
Displays the menu. The device will respond with the menu shown on
page 8.
2x1 Compact VGA Switch w/ Audio
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4. Troubleshooting
4.1 In Case of Trouble
There are no field serviceable parts or circuits in the device. If you
think that the device is malfunctioning, please first make sure that all
your connections are solid, and check the state of the LED’s on the
front of the unit to access the mode it is in.
If you still cannot overcome the problem, disconnect the video and
audio input connections from the unit. Unplug the power from the unit
and after a few seconds reconnect power. Connect your audio and
video signals after the unit is powered up. Check performance.
4.2 Calling Black Box
If you determine that your unit is malfunctioning, do not attempt to
repair the unit. Contact Black Box Tech. Support at 724-746-5500.
Before you do, make a record of the history of the problem. We will be
able to provide more efficient and accurate assistance if you have a
complete description, including:
• The nature and duration of the problem;
• The components involved in the problem—that is, what type of
cable, makes and models of computers and monitors, etc.
• The results of any testing you’ve already done.
4.3 Shipping and Packaging
If you need to transport or ship your AC505A-2A:
• Package it carefully. We recommend that you use the original
container.
• Before you ship the unit back to Black Box for repair or return,
contact us to get a Return Authorization (RA) number.
Model AC505A-2A
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5. Specifications
Video Inputs VGA, RGBHV,RGBS, RGsB, or Component Video
(YPbPr – would require HD15 to 3 RCA adapter)
Resolutions
Supported PC from VGA to UXGA (640x480 to 1600x1200)
HD from 480p to 1080p
Audio Inputs PC or Consumer audio (standard line-level)
Video Level 0 to 0.7V p-p on RGB, 0 to 5 V for H and V Sync
Bandwidth 200 MHz
Temperature Operating: 32 to 122°F (0 to 50°C);
Storage: –40 to +185°F (–40 to +85°C)
Enclosure Steel
MTBF 90,000 hours (calculated estimate)
Power 6V center positive via supplied Universal power
supply (100~240VAC).
Size 1.3” (33mm) H x 9" (229mm) W x 2.6” (66mm) D
Weight 1.1 pounds (500 grams)
© Copyright 2007. Black Box Corporation. All rights reserved.
1000 Park Drive Lawrence, PA 15055-1018 724-746-5500 Fax 724-746-0746
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