Extron Electronics SW8_12 VGA Ars User Guide - Manual (Page 25)

SW8/12 VGA Ars • Control 3-2
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) commands.
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 RS-232 Description RS-232 Control Port Connector
1 — —
DB9 Pin Locations
Female
5 1
9 6
2 Tx Transmit data
3 Rx Receive data
4 — —
5 Gnd Signal ground
6 — —
7 — —
8 — —
9 — —
Rules governing SIS commands include:
• 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.
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