QS-1
MPX 423 A • Quick Start
PRELIMINARY

Installation

Step 1

Turn off power to the MPX 423 A switcher and all other devices that will be connected.

Step 2

Select your mounting option and install the appropriate brackets. Mount the switcher as illustrated
below (see chapter 2, “Installation”).
50/60 Hz
100-240V 0.3A
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ACTLINK
RS-232
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COMPUTER IN COMPUTER OUTVIDEO IN S-VIDEO INOUTOUTCOMPUTERVIDEOS-VIDEOVARIBLE#8 Screw (4 Plcs)
Each Side
Mounting Screws (2 Plcs)
Each Side
orSupplied BracketOptional Bracket

Step 3

Attach up to four VGA, four S-video, and four Video (composite) input devices (up to four of each
type) to the MPX 423 A switcher.

Step 4

Connect up to two VGA, two composite video, or two S-video outputs from the switcher to a projector
or other output device. See the following page for an installation diagram.

Step 5

For audio input, connect up to 12 audio sources to the audio inputs of the VGA, Video (composite),
or S-video groups (up to four audio sources for each group). Refer to Chapter 2, Installation, for wiring
diagrams.

Step 6

For audio output, connect up to two audio output devices. Refer to Chapter 2, Installation, for wiring
diagrams.

Step 7

If the MPX 423 A matrix switcher is to be connected to a computer or host controller for remote
control,
1. Connect the host controller’s RS-232 cable to the 9-pin, female RS-232 remote connector of the
switcher (see pinout table on the following page).
Quick Start — MPX 423 A Matrix Switcher