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Control
Remote Control via Simple Instruction Set (SIS
The SW8/12 VGA Ars switchers can be controlled via RS-232 using Extron's Simple
Instruction Set (SIS
The RS-232 port communications protocols are: 9600 baud, 8 data bits, 1 stop bit,
no parity, and no flow control. Cable pinouts are shown in the table below.
Only pins 2, 3, and 5 are required. Disconnect all other conductors in the
attachment cable for proper operation.
Pin
Rules governing SIS commands include:
•
•
•
•
•
Switcher-initiated (unsolicited) messages
When a local event, such as a front panel operation or error condition, occurs, the
switcher responds by sending a message to the host. Switcher-initiated messages
are listed below:
(C) Copyright 2008, Extron Electronics SWy VGA Ars, Vx.xx
The switcher issues the copyright message when it first powers on.
y = the number of inputs (8 or 12, depending on the model)
x.xx = the firmware version number
3-2
SW8/12 VGA Ars • Control
™
) commands.
RS-232
Description
1
—
2
Tx
Transmit data
3
Rx
Receive data
4
—
5
Gnd
Signal ground
6
—
7
—
8
—
9
—
SIS commands consist of one or more characters per field.
No special characters are required to begin or end a command sequence.
When a command is valid, the switcher executes the command and sends a
response to the host device.
All responses from the switcher to the host end with a carriage return and a
]
line feed (CR/LF =
), which signals the end of a response character string.
A string is one or more characters.
RS-232 Control Port Connector
—
—
—
DB9 Pin Locations
—
—
—
)
™
5
1
9
6
Female
]
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