Extron electronic RAC 104 Remote Control, Simple Instruction Set, Host-to-controllerinstructions

Remote Control

The RAC 104 can be controlled remotely via the RS-232 connector using the Extron Simple Instruction Set (SIS) or the Extron Windows-based control program.

The RS-232 connector on the RAC 104 is a 3-pole captive screw connector, with one pole for transmitting data, one for receiving data, and one for the ground. Wire the RS-232 connector as shown below.

Transmit (Tx)

Receive (Rx)

Ground (Gnd, )

RS-232 Tx Rx

RS-232 connector wiring

Pin	RS-232 function	Description
1	Tx	Transmit data
2	Rx	Receive data
3	Gnd	Signal ground

RS-232 pin assignment table

The RS-232 protocol for this connector is 9600 baud, 8-bit, 1 stop bit, no parity.

Simple Instruction Set

Host-to-controller instructions

The RAC 104 accepts SIS commands through the RS-232 port. SIS commands consist of one or more characters per command field. They do not require any special characters to begin or end the command character sequence. Each controller response to an SIS command ends with a carriage return and a line feed (CR/LF = ), which signals the end of the response character string. A string is one or more characters.

Controller-initiated messages

The following copyright message is initiated by the controller when it is first powered on. Vx.xx is the firmware version number.

Boot V1.00,(c) 2003, ? to Enter

(c) Copyright 2003,Extron Electronics,RAC 104, Vx.xx

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