Extron electronic PVS 204SA manual Serial Communication, RS-232 Programmer’s Guide

RS-232/MLC/IR

Tx Rx IR +12V

A B C D E

Serial Communication

The PVS 204SA switcher can be remotely set up and controlled via a host computer or other device (such as a control system) attached to the rear panel RS-232/MLC/IR port. Alternatively, the switcher can be controlled by an optional MediaLink Controller (MLC) (connected to the same port) or by an RS-232 device acting through the MLC. The control device (host) can use either Extron’s Simple Instruction Set (SIS™) commands or the Global Configurator

(GC2) program for Windows. For details on use and setup

of a system that includes a MediaLink Controller, refer to the MediaLink Controller user’s manual.

Switcher protocol:

•9600 baud • 1 stop bit • no parity • no flow control

RS-232/MLC/IR connector pin assignments:

NConfiguration can also be completed by connecting a 2.5 mm stereo mini cable (part # 70-335-01) to the 2.5 mm jack (port) on the front panel. This port has the same protocol as the RS-232 connector on the rear panel.

(A)Transmit (Tx)

(B)Receive (Rx)

(C)IR in

(D)Ground ( )

(E)+12 VDC out

PRELIMINARY

		6 feet
1	6
5	9
				Tip
				Ring
	9-pin D	Connection	TRS Plug	Sleeve (Gnd)
	Pin 2	Computer's RX line	Tip
	Pin 3	Computer's TX line	Ring
	Pin 5 Computer's signal ground		Sleeve

Figure 4-1 — Pin out diagram for 2.5 mm mini cable TRS plug when connecting to the front panel Config port

NFirmware updates can be made only via the front panel Config port.

RS-232 Programmer’s Guide

Host-to-PVS communications

SIS commands consist of one or more characters per field. No special characters are required to begin or end a command sequence. When the PVS switcher determines that a command is valid, it 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 the response character string. A string is one or more characters.

PVS-initiated messages

When a local event such as a front panel selection or adjustment takes place, the PVS responds by sending a message to the host. No response is required from the host. The PVS-initiated messages are listed here (underlined).

© Copyright 2006, Extron Electronics, PVS 204SA, V1.xx Chn x

The PVS sends the copyright messages when it first powers on. V1.xx is the firmware version number.

Chn X! ] (where X! is the input number)

The PVS sends this response when an input is switched.

4-2 PVS 204SA • Serial Communication