AVocation Systems VGA-4 User Manual
VGA-4 Instructions
Teach
RS-232
IR
+VGndS+
Baud
ID
Auto
Term
1 2 3 4
IR
+VGndS+
-
1 2 3 4
1 2 3 4
Teach
RS-232
IR
Confirm
IR
+VGndS+
-
VGA-4HD
Automatic/Manual
VGA Selector
Baud
ID
Auto
Term
IR
+VGndS+
-
Power Connections
The VGA-4 requires 9-24vdc at 100ma in continuous operation.
The startup current draw is 800ma for 50 milliseconds so your power supply must be able to supply that initial current
rush. Most wall transformer supplies are able to supply the current required. Some regulated supplies may limit the inrush
current well and may not work unless they are rated above 800ma continuous duty.
Selection
Gnd
+vdc
Input 1
Input 2
Input 3
Buttons
Output
Input 4
VGA-4 ID
The VGA-4 has an ID code which allows up to 8 units to operate together. The unit ID code is set by the same bank
of switches as the baud rate. The following shows the switch setting for these codes. The ID code is used in both IR
commands and serial commands. Factory default is Unit ID 0.
Operating via Infrared Control
The VGA-4 can be controlled via IR remote signals. The unit has two methods of receiving IR coommands. The IR
window will receive codes directly from a remote or through an emitter on an IR repeater system. The connection through
the terminal block allows the VGA-4 to be hardwired into the IR repeater system. The VGA-4 will operate on any repeater
system that is based on 0vdc for no IR signal and +5 to +12vdc for an active IR signal. The VGA-4 infrared commands
operate at 38KHz.
When an IR code is being received through either method, the IR conrm LED will blink
Teaching IR Commands
The VGA-4 is capable of teaching it’s 38KHz IR control codes to most models of learning
remotes and controllers. The teaching emitter will output the code for an input selection when a
source selection button is pressed on the unit.
ID 0 ID 1 ID 2 ID 3 ID 4 ID 5 ID 6 ID 7
IR
Window
Selection Buttons
Teaching
Emitter
Signal
Gnd
Serial Connections
1 2 3 4
RS-232
IR
Confirm
IR
+VGndS+
-
VGA-4HD
Baud
ID
Auto
Term
+VGndS+
-
The VGA-4 can be controlled via RS-232 or RS-485.
The RS-232 port is the 9-pin D-Sub connector.
RS-485 is connected to the - (A) and + (B) positions on the terminal block.
Transmit
Receive
Ground
B
A
Baud rate is adjustable from 1200 to 115200 baud 8 bits, no parity and 1
stop bit.
1200 baud 2400 baud 4800 baud 9600 baud 19200 baud 38400 baud 57600 baud 115200 baud
RS-485
Serial Commands
The following is a master list of commands the VGA-4 will recognize. Each will be described in detail in the following
pages. Please see the notes at the end of the list for a description of the variables in each command.
Switching Command
ASiBn<CR>
Select an input AS0B2<CR>
i = Unit ID 0-7 Selects input 2
n = Input to select 1-4
Response: ASi-A/V input = n<CR>”
Status Command
Request current status of unit AS0S<CR>
i = Unit ID 0-7 Request status
Response: ASi-A/V input = n<CR>”
ASiSn<CR>
10956 Ammons St.
Westminster, CO 80021
Ph: 303-410-6639 l 1-877-805-6639
www.avocationsystems.com
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