NSI DMX-16 Installation And Operation Manual

DMX 16 DEMULTIPLEXER
Version B Introduction

DMX 16 DEMULTIPLEXER

INSTALLATION AND OPERATION GUIDE

Version B

Introduction

NSI developed a microphone cord multiplex system called Microplex, which is utilized by most NSI control
consoles to make set-up and connection easy and convenient. The purpose of the DMX 16 Demultiplexer is to
provide a means of interfacing Micro-plex to most non-multiplexed dimmer systems and effects offered by other
manufacturers. Instead of many separate wires, cables, and special connectors needed to connect lighting control
consoles to dimmer packs, NSI Microplex uses a single, standard 3-pin microphone cord to carry up to 128 control
channels and also provide power to the control console.

Sixteen of the possible 128 control channels are decoded and converted to DC voltage outputs by the DMX 16.
These outputs are made available through the use of screw terminals on the back panel of the DMX 16. Since
dimmer control connectors vary widely, the use of screw terminals allows connection to a wide variety of dimmer
systems. The DMX 16 also provides the electrical power needed by the control console.

Specifications

Power Requirements 120 VAC 75 WATTS 6OHZ

(240 VAC 35 WATTS 50HZ)

Serial Control System NSI "Micro-Plex"

DC Output ( ea channel ) 0 - +10 Volts DC 20 MA

(Adjustable +4 to +12 Volts)

Controller Power Supply Output +15 VDC 500ma regulated

Mic. Cord Pinout: Pin 1 Ground

Pin 2 +15 VDC to Controller
Pin 3 Multiplex Data

NSI CORPORATION 1

DMX 16 DEMULTIPLEXER

Installation Version B

Installation

The DMX 16 should be located as close to the dimmer packs as possible. If the dimmer system is rack mounted,
the DMX 16 may be mounted in the same rack for convenience.

Connection to a NSI Controller is accomplished with a standard 3-pin microphone cord or one balanced channel
of an audio snake. Connect the cable to the controller as outlined in the controller owners manual. Either the male
or female 3-pin connectors on the DMX 16 may be used for input signals. The remaining connector is used for
connection to another DMX 16 or NSI "Micro-Plex" Dimmer Packs.

On the back panel of the DMX 16 is sixteen numbered screw terminals and four additional screw terminals marked
"G". The number of the screw terminal corresponds to the relative channel number (see setting channels - front
panel switches 1 and 2). Ground terminals are represented by the letter "G".

Consult the literature supplied by the manufacturer of your dimmer pack to determine the wires of the control
cable that are used for DC control wiring of each dimmer channel. Also determine which wire is used for DC
GROUND (or COMMON). NOTE: Any other wires that are used for special power supplies and other

purposes must not be connected to the DMX 16.

Control wire for each dimmer channel should be connected to the corresponding screw terminals of the DMX 16.
Connect the dimmer DC GROUND or COMMON wire to the most convenient "G" terminal of the DMX 16. Any
or all of the Ground terminals may be used.

For example; connecting the control wire for channel #1 from a dimmer pack to DMX screw terminal #1 will
cause that dimmer channel #1 to appear to the operator as channel #1. While connecting the same dimmer control
wire to DMX terminal #5 instead will cause that dimmer channel to appear as channel #5.

Whenever possible a control cable connector should be obtained from the dimmer pack manufacturer and attached
to the DMX 16 to prevent cutting and splicing the control cable.

Front Panel Switches

Switch number one, two, and four are used to set the control channels that the DMX 16 will respond too.

SWITCH ONE SWITCH TWO SWITCH FOUR CHANNELS

OFF OFF OFF 1 - 16

ON OFF OFF 17 - 32
OFF ON OFF 33 - 48

ON ON OFF 49 - 64

OFF OFF ON 65 - 80

ON OFF ON 81 - 96
OFF ON ON 97 - 112

ON ON ON 113 - 128

Switch number three is used to set the dimmer condition when the DMX 16 is not receiving controller multiplex
signals due to a disconnected or faulty controller cable

SWITCH THREE NO MPX CONDITION

OFF All lights fade to full.

ON All lights fade to off.

2 NSI CORPORATION