Leviton DMX-512 Installation guide

Installation and
Operating Guide
MDS DIMMERCABINETSWITH
LUMA-NET®CONTROL
Software revision 1.01 and above

Installation and Operating Guide
Leviton MDS Dimmer Cabinets with Luma-Net Control ii
Table of Contents
OVERVIEW
Description............................................................................... 1
Inspection................................................................................ 1
Mounting ................................................................................. 1
Surface Mount ................................................................ 1
Freestanding .................................................................. 2
Power Wiring............................................................................ 2
Control Wiring .......................................................................... 2
Fluorescent Wiring.................................................................... 2
Turn On ................................................................................... 2
Modules ................................................................................... 3
Checklist .................................................................................. 3
INITIALSETUPANDINSTALLATION
Inspection................................................................................ 4
Mounting ................................................................................. 4
Surface Mount ................................................................ 4
Freestanding .................................................................. 4
Power Wiring............................................................................ 4
Emergency Power Wiring .......................................................... 4
Control Wiring .......................................................................... 5
Fluorescent Wiring.................................................................... 5
Neon and Cold Cathode Dimming............................................... 5
Turn On ................................................................................... 6
Modules ................................................................................... 6
Module Configuration................................................................ 6
Digital Control Panel ................................................................. 7
Luma-Net® III ............................................................... 7
DMX-512........................................................................ 7
Analog ........................................................................... 7
Multiple Signal Types ...................................................... 7
Readouts and Indicators ........................................................... 8
LCD Display.................................................................... 8
Programming Buttons ..................................................... 8
LED Indicators................................................................ 9
Navigation Buttons.......................................................... 9
Fluorescent Dimming ................................................................ 9
0-10VDC Controlled Ballasts ........................................... 9
Two-Wire Fluorescent Ballasts ....................................... 10
Other Ballasts......................................................................... 10

Installation and Operating Guide
Leviton MDS Dimmer Cabinets with Luma-Net Control iii
CONFIGURATIONANDPROGRAMMING
Overview ............................................................................... 11
Dimmer Configuration in the Field............................................ 11
Basic Dual Dimmer Module DI21-120U ..................................... 11
Three More Module Configurations........................................... 12
DND20/126-1 ............................................................... 12
XDND20/126-1 ............................................................. 12
F20-120U/136-1 ........................................................... 12
Checking the Module Programming in a Dimmer Cabinet ........... 12
Dimmer Types........................................................................ 13
Changing a Module Type......................................................... 14
Assigning Luma-Net and/or DMX512 Channels.......................... 15
Assigning Numbers Automatically................................... 15
Assigning Individual Channels........................................ 16
Specifications ......................................................................... 17
WARRANTYINFORMATION
Warranty................................................................................ 18

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Overview
Description
The MDS Dimmer Cabinet with Luma-Net® Control is one of the most versatile
dimmer cabinet systems on the market today. It comes in two versions; a wall
surface-mounted version and a freestanding floor model. The cabinets are
modular in design, allowing multiple sections to be assembled into a complete
dimmer cabinet, sized for virtually any job requirement. Because of the modular
construction, any number of dimmers can be accommodated.
Dimmers can be of varying kilowatt ratings from 2,400kW through 12,000kW.
The cabinet can be fed from 120/208VAC, 3Ph, 4W-120/240VAC, 1Ph,
3W-277/480VAC, 3Ph, 4W-347/600VAC, 3Ph, 4W sources, and can be
barriered to accommodate mixed feed voltages. It can also be barriered to
contain an emergency section fed from a separate emergency source.
As part of the same cabinet, it can contain a UL Listed 1008 transfer contactor
where required. It is completely convection cooled in ambient temperatures up to
104 oF (40oC).
Some of the dimmer features are:
•Plug-in installation or replacement
•Convection cooling
•Ability to dim virtually any lighting load
•UL Listed for use in USA and Canada
•Compliant with NEMA requirements
•Easy to install
•Generous wiring space
•Main circuit breaker capability
The control portion of the dimmer cabinet employs all digital circuitry for accuracy
and for minimum wiring requirements between the dimmer cabinet and its control
systems. Because of the digital nature, the software can tell a dimmer module
whether it is to be a dimmer or a non-dim, tell it what type of fluorescent dimmer
ballast it will operate, and set up the required parameters to properly drive
virtually any type of fluorescent dimmer ballast. The LCD display provides easy
interaction with the software.
Please see Initial Setup and Installation for complete installation instructions.
Inspection
Unpack the unit, checking for any damage. Report all damages to the freight
carrier.
Mounting
Surface Mount
Surface-mounted units include 1-inch flanges top and bottom across the full width
of the dimmer cabinet, with prepunched mounting holes. Attach the cabinet to
the wall as necessary, keeping in mind the weight to be supported. The cabinet is
designed for side or bottom feed. Top feed cabinets are available on request.

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Freestanding
Freestanding floor units are 90inches tall by 20inches deep overall, with the
width determined by the number of cabinet sections necessary to suit a particular
job requirement. Generally both freestanding and flush-mounted cabinets are
designed for side or bottom feed. Top feed cabinets are available on request.
Power Wiring
The cabinet includes:
•Main lugs for phases A, B, and C (or A and B in the case of a single-phase
cabinet)
•A load terminal block to land all the dimmer output load wiring. Where a single
dimmer feeds multiple load circuits output load wiring lands on the associated
branch circuit breaker terminals.
•A multi-terminal neutral block
•A single ground terminal
An optional multiple-terminal ground bus is available; call the factory and ask for
part number HDW-32096-00. The main lugs are sized for every dimmer to be
loaded to maximum capacity. You may elect to size the feed to the actual
connected load on the cabinet.
Control Wiring
Typically the left portion of the dimmer cabinet is reserved for control wiring.
Refer to the installation diagrams that are shipped with the dimmer cabinet.
Terminate all control wiring to the terminal blocks provided. Use a small 1/8-in.
flat screwdriver on these terminals.
Fluorescent Wiring
Some fluorescent dimmer ballasts use three power wires; a neutral, a switched
hot, and a line voltage control wire.
Some fluorescent dimmer ballasts require only two power wires; one hot circuit
wire that is both dimmed and switched, and one neutral wire.
Some dimmer ballasts require line and neutral plus two low voltage control wires.
Make sure the dimmer ballasts on this project are correctly wired prior to turn on.
Incorrect wiring of these ballasts to dimmers can damage the ballasts.
Turn On
Prior to turn on, verify the following:
•Main feed wiring
•Load wiring
•Remote control wiring
•Configuration of each module with the type of load connected and any ballast
control wiring

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Modules
Each of the dimmer modules are held in place by four mounting screws.
To change a dimmer:
1Turn off all power to the dimmer cabinet.
2Remove the four screws that hold the dimmer in place.
3Pull the module forward sufficiently to unplug the power and control
connectors.
To install a new unit:
1Insert the dimmer partially in the cabinet.
2Plug the power and control connectors into the rear of the replacement
dimmer.
3Insert the dimmer into the cabinet.
4Reuse the four mounting screws to hold the dimmer in place.
By using multi-pin connectors for both power and control wiring, there is no risk
of crossed wires when hooking up a new module.
If it is not possible to shut down the entire cabinet, turn off the circuit
breakers feeding the dimmer modules above and below the new module.
Checklist
Unpack the system
Report any damages
Attach any surface mounted cabinets to the wall
Set freestanding floor cabinets in place
Terminate control wiring
Make sure that any dimmer ballasts are correctly wired
Verify the main feed wiring
Verify the load wiring
Verify the remote control wiring
Verify the configuration of each module

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Initial Setup and Installation
Inspection
Carefully unpack the dimmer system, and inspect to make sure there has been no
hidden shipping damage. Report all damage to the freight carrier who delivered
the system. Claims for damages are filed with the freight carrier as all freight is
shipped FOB Tualatin, Oregon. The MDS dimmer cabinet can be serviced in the
field with replacement factory components in case of damaged parts.
Mounting
Surface Mount
Surface-mounted units include a 1-in. flange top and bottom across the full width
of the dimmer cabinet with prepunched mounting holes. Attach the cabinet to the
wall as necessary, keeping in mind the weight to be supported. Leviton
recommends that cabinet mounting hardware reaches through the wall and
attaches to the wall studs. However properly sized struts and suitable hardware
can be used. The cabinets are heavy, and should not exceed the anchor limits.
The cabinet is designed for side or bottom feed. Top feed cabinets are available
on request.
Freestanding
Freestanding floor units are 90in. tall by 20in. deep overall, with the width
determined by the number of cabinet sections necessary to suit a particular job
requirement. Generally both floor and surface-mounted cabinets are designed for
side or bottom feed. Top feed cabinets are available on request.
Power Wiring
The cabinet includes:
•Main lugs for phases A, B, and C (or A and B in the case of a single-phase
cabinet)
•A load terminal block to land all the dimmer output load wiring. Where a single
dimmer feeds multiple load circuits output load wiring lands on the associated
branch circuit breaker terminals.
•A multi-terminal neutral block
•A single ground terminal
An optional multiple-terminal ground bus is available; call the factory and ask for
part number HDW-32096-00. The main lugs are sized for every dimmer to be
loaded to maximum capacity. You may elect to size the feed to the actual
connected load on the cabinet.
Emergency Power Wiring
Depending on job requirements there may be an barriered section within the
cabinet that contains emergency dimmers, contactors, power supplies and other
equipment as needed. This section can assure that full power from an emergency
source is fed to certain circuits designated as emergency circuits.

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This section will include:
•Main lugs for emergency phases A, B, and C (or A and B in the case of a single
phase emergency system)
•Emergency power, which can be 120/208VAC, or 277/480VAC depending upon
the power requirements for the entire job
•Load terminal block to land all the dimmer output load wiring
•A multi-terminal neutral block
•Bypass relays to bring the power to full brightness in case of power outages of
the normal power feeds
•A UL 1008 transfer contactor if specified
If bypass contactors are used, each dimmer will have a normally closed bypass
contactor in parallel with it. This bypass contactor is held in the open position by
power from the normal power sources and the control power. Should any of these
normal power sources fail, the bypass contactors fall shut, supplying full power to
the emergency load circuits until normal power returns. When normal power
returns they are held open again, and normal dimming operation of the
emergency circuits resumes where it left off.
Control Wiring
Typically the left portion of the dimmer cabinet is reserved for control wiring.
Refer to the installation diagrams that are shipped with the dimmer cabinet.
Terminate all control wiring to the terminal blocks provided. Use a small 1/8-in.
flat screwdriver on these terminals.
Fluorescent Wiring
Some fluorescent dimmer ballasts use three power wires; a neutral, a switched
hot, and a line voltage control wire.
Some fluorescent dimmer ballasts require only two power wires; one hot circuit
wire that is both dimmed and switched and one neutral wire.
Some dimmer ballasts require line and neutral plus two low voltage control wires.
Double check the wiring to the dimmer output terminals that feed the
dimmer ballasts before turning on any power; these ballasts can be
adversely affected if the line voltage control wire and the switched line
connections are reversed. Some dimmer ballasts require line and neutral
plus two low voltage control wires. Make sure the dimmer ballasts are
correctly wired prior to turn on.
Neon and Cold Cathode Dimming
The dimmers are capable of dimming both neon and cold cathode. In both cases
the transformers used to step up the voltage for the tubes must be of the low
power factor type (sometimes called normal power factor types). Using power
factor corrected type stepup transformers will result in poor dimming. There are
certain types of solid state stepup transformers available for Neon and Cold
Cathode operation. These are normally not designed to be dimmed; attempting to
dim them may result in harm to the solid state transformers. Check with the
manufacturer of these transformers for suitability before connecting them to
dimmers in this system. It is generally recommended that a transformer with an

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output voltage rating about 1.5 times that normally chosen for a given tubing
diameter and fill be used to insure good dimming throughout the range.
Turn On
Prior to turn on, verify the following:
•Main feed wiring
•Load wiring
•Remote control wiring
•Correct wiring to any fluorescent dimmer ballasts
•Configuration of each module with the type of load connected and any ballast
control wiring
With all power and control wiring in place, and all dimmer modules installed and
properly configured, the system is ready for turn on.
Modules
Each of the dimmer modules are held in place by four mounting screws.
To change a dimmer:
1Turn off all power to the dimmer cabinet
2Remove the four screws that hold the dimmer in place.
3Pull the module forward sufficiently to unplug the power and control
connectors.
To install a new unit:
1Plug in the power and control connectors.
2Insert the dimmer partially into the cabinet.
3Plug the power and control connectors into the rear of the replacement
dimmer.
4Insert the dimmer the rest of the way into the cabinet.
5Reuse the four mounting screws to hold the dimmer in place.
By using multi pin connectors for both power and control there is no risk of
crossed wires when hooking up a new module.
Module Configuration
Prior to turn on, carefully check the as-built prints shipped with the cabinet. The
dimmer modules in the cabinet are arranged in order just as they are shown on
these prints. If there have been changes to the job site loads that do not agree
with the as-built prints, modifications to the modules or their positions in the
cabinet could be necessary.
Verify that each module is wired to the load as shown on these drawings.
If the dimmer modules are driving the wrong load circuits, damage can
occur to certain types of dimmer ballasts. Some ballasts are adversely
affected if the dimmed and switched connections are reversed.

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Digital Control Panel
The digital control panel in this cabinet is equipped with a powerful
microprocessor to make this a multifunctional system. It can accept several types
of input signals, depending on the exact configuration.
Luma-Net® III
The most common input is Luma-Net III, a Leviton protocol, that sends serial
digital data over a twisted pair of communication (data) wires. With this system,
controls can be located up to 2000 ft from the dimming cabinet. The two data
wires terminate on REM+ and REM- of the Luma-Net Terminal Block. Any shield if
present is not connected.
Along with this pair of communications (data) wires are a second pair of wires for
providing current limited 12 VDC power to operate displays and electronics in the
remote control stations. These wires terminate on COM and +V. The
communications signals require very little power, and number 24AWG wire is
adequate for the twisted pair. Belden number 9729 or equivalent is
recommended. However the 12 VDC power wires handle more current and should
be a minimum of 14 AWG size wire to insure that only a very small amount of
voltage drop takes place over long distances. If a remote DC power supply is
used, all DC common wires must be joined.
Where more than one remote control panel or dimmer cabinet using Luma-Net III
communications is used in a system, the data wires and the DC power wires are
run together from the dimmer cabinet to the nearest control station, then on to
the next station, and the next, and so on. At the last control station or dimmer
cabinet on both ends of the run, a small jumper wire must be run from the
terminal labeled “Rem-” to the terminal marked “Term” on that last station. This
jumper wire properly terminates the digital communications lines at the end of
the line.
DMX-512
The digital control panel accepts DMX-512 signals, an industry standard signal
widely used in the theater industry. This offers the opportunity to use small
theatrical consoles to control some or all of the dimmers in the MDS Dimmer
Cabinet.
Analog
The digital control panel accepts a third type of control signal often used with
analog control systems, if equipped with the optional DC Control Card. This signal
varies between 0VDC and +10VDC to control the dimmer outputs. An input of
0V results in no output power from the dimmer; an input of +10VDC gives full
voltage output from the dimmer. Varying this signal from 0VDC to +10VDC
varies the AC output voltage from zero to virtually full line voltage. If this system
uses analog inputs, an optional DC Control circuit card will have been added
during fabrication within the control cards assembly.
Multiple Signal Types
Under certain circumstances the digital control panel can receive two or more
types of input signals. The output from each dimmer is determined by the highest
input signal it receives from the different sources.

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Input terminals for RS485 and RS232 signals direct from a computer can be used
in programming the digital control panel. There are also terminals reserved for
future use with a communications protocol called Canbus.
Readouts and Indicators
LCD Display
The LCD display helps you determine that the system is operating properly.
Display information also helps locate certain types of malfunctions or errors in
connections to the system, and enables certain setup instructions to be
programmed into the system, such as combining more than one dimmer to a
single channel of control.
When the system is operating normally the top line of the LCD display window
shows the name of the system and the version of software running in the
microprocessor (a2000 Ver 1.01). The second line flashes continuously and
displays STATUS=OK 3PHASE or STATUS=OK 1PHASE in a system designed to
be fed by only two phases. When the system is configured it is told whether it is
operating on 50Hz or 60Hz, which the display indicates. This is done by a dip
switch, and internally changes certain time constants for proper operation.
Programming Buttons
The three programming buttons are located to the right of the LCD display:
•FULL BRIGHT. Turns all lights on all channels to full brightness. Pushing it
twice turns off this function and returns the lights to their previous state.
•SELECT/SAVE. Causes a new readout on the LCD display. It shows the actual
input voltage on each of the incoming three phases. It reads out directly in
volts as well as showing the frequency as 60Hz or 50Hz.
•CANCEL/CLEAR. Returns the LCD display to the normal readout.
Many parameters can be modified using the LCD screen and a password
(setup code), however these modifications should be made by a qualified
factory technician. Some of these options are covered in Configuration
and Programming.
PHASE LOSS
AUX
FULL BRIGHT
FAN
DMX
LUMANET
FULL
BRIGHT
SELECT
SAVE
CANCEL
CLEAR
LCD display
Programming buttons
LED indicators
Navigation buttons

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LED Indicators
The digital control panel has several LED indicators:
•PHASE LOSS. Lights if one or more of the three phases feeding the dimmer
cabinet are lost. On a two-phase system it indicates the loss of one of the two
phases.
•FULL BRIGHT. Warns that someone has selected full bright using the manual
switch on the front panel or any external full bright switch, and no outside
signals will override and allow dimming to occur. Without this indicator
considerable time could be lost trying to determine why all lights are on full
bright and nothing seems to be able to control them.
•FAN. The MDS dimmer cabinets use no fans, however the control module is
compatible with other dimmer cabinets that do use fans. The fan indicator
serves no purpose in this application.
•AUX, DMX, LUMANET. Shows digital signals being received. A blinking
indicator light indicates that a digital signal is actively being received through
the channel with the blinking LED. If more than one is lighted, more than one
digital signal is being received.
Navigation Buttons
The lower four buttons, used for navigation, are LEFT , UP , DOWN ,
and RIGHT .
Fluorescent Dimming
Many installations incorporate fluorescent dimming ballasts into some or all of the
fluorescent fixtures. This section includes general information about dimming
ballasts, their use, and their control methods.
For best lamp life, lamp manufacturers recommend their fluorescent
lamps should be operated for a minimum of 100 hours at full brightness
before dimming is permitted. For best results lamp brands and types
should not be intermixed on a circuit.
0-10VDC Controlled Ballasts
This method of ballast control is used by Sylvania, ESI Superdim 10, MagneTek,
Advance for the Mark VII ballasts and others. It requires that the line voltage feed
to the ballasts be switched On for operation, and Off to achieve zero light level,
because these ballasts do not dim all the way to blackout.
One half of a dual dimmer module is used as an On/Off switch as described
above, and feeds the line voltage to the dimmer ballast. A row of screw
compression terminals located along the top of the PC board provides the 0VDC
to +10VDC control voltage drain for the ballast. There are sufficient terminals for
the purple control wire for up to eight circuits using these ballasts. Therefore the
maximum number of circuits with this type ballasts that can be fed from one
a2000D dimmer cabinet is eight. The system automatically assigns outputs in
order of these dimmer types. Refer to the figures to determine that assignment.
The maximum number of ballasts that can be controlled on any one circuit is 24.
This limitation is determined by the amount of control current that the circuit
board can handle.

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There is also a group of terminals for the common gray ballast control wires.
Since these are dual dimmers, one half of the dimmer provides the On/Off line
voltage to the ballast, and for that same position the 0VDC to +10VDC signal is
available to tell the ballast what brightness is required.
Two-Wire Fluorescent Ballasts
A second method of control used by the Advance Mark X fluorescent dimmer
ballast and certain Lutron dimmer ballasts called TU Wire™uses the power feed
wires to the dimmer for both power and control. Only half of a dual dimmer is
required to drive the ballast since it serves to dim the ballast and is used as an
On/Off switch to turn the lights fully off when they are not being used. In this
configuration, the dimmer output that controls the light intensity is not allowed to
go below some value of true RMS voltage in order to allow the ballast to generate
the correct amount of filament voltage for the fluorescent lamps. By selecting the
correct ballast type in setup, the digital circuitry of this control board
automatically sets the correct minimum voltage for the ballast type selected
Other Ballasts
A third method of control used by Lutron Hi Lume™or Eco 10™ballasts and
older core and coil type magnetic dimming ballasts uses a different dedicated
dimmer module. There are three power wires to the ballast, which differs from
other dimming ballasts on the market. This dimmer takes up a complete module
(both the A and B sides of the dimmer) but drives only one circuit.
The first power wire supplies line voltage whose output is varied by the dimmer.
The second power wire supplies line voltage that must be switched on and off.
The third power wire is the neutral return.
This special dimmer module uses only one input breaker to feed the dimmer
module.
A minimum light level must be set for the Lutron ballasts, depending on
the particular ballast being used. Operating the ballasts below that
minimum level can result in damage to the ballast and lamps.

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Configuration and Programming
Overview
The Leviton MDS Digital Dimmer Cabinet uses an intelligent central control card
(Digital Main Control Module), enabling the dimmers in this system to dim and
control virtually any incandescent or fluorescent lighting load. It is possible to use
three different types of control input signals to this control card. Leviton prepares
complete and detailed submittal drawings for each dimming system order, and
requires approval of these prints for each job before it is released to production.
The factory installs the correct basic dimmer module in each slot, and programs it
for the correct functionality.
One basic dimmer (called the “Universal” dimmer) can be programmed to drive a
number of different load types. By referring to the electrical prints sent out,
checked, approved, and returned by the installing electrical contractor, the factory
programs each dimmer slot to correctly drive the load that will be connected to
each load terminal in the dimmer cabinet.
Dimmer Configuration in the Field
If the loads fed by the dimmer cabinet change, you must modify the dimmer
cabinet to accommodate the changing load type. Changing a circuit from
incandescent to fluorescent lights would require this type of modification.
Basic Dual Dimmer Module DI21-120U
The DI21-120U dimmer is capable of driving:
•Regular incandescent, quartz, quartz halogen, tungsten argon and similar lamp
loads
•Stepdown transformers to operate low voltage incandescent lamp types
•Certain electronic stepdown transformers (Check exact types for compatibility)
•Neon and cold cathode transformers, of the low power factor type
•Fluorescent dimmer ballasts requiring 0VDC to +10VDC control signals The
dimmer here acts as an on/off contactor and the 10VDC control comes from
the control board in the dimmer.
•Fluorescent dimmer ballasts using two wires for both power and control using
the Advance Mark X dimmer ballasts
•Fluorescent dimmer ballasts using two wires for both power and control using
the Lutron TuWire ballasts
•Non-dim loads that need to be only turned on and off by the module, not
dimmed
•Dimmed loads that require complete turn off at some point (done by correctly
programming each dimmer slot for the load that is to be connected)
There are many different types and brands of fluorescent dimming ballasts; many
of these require different types of dimmers, modules, and control configurations.
If the dimmer ballasts found on a job site are different than the system was
designed to drive, it is necessary to check with the factory. We can assist you in
verifying whether the existing dimmer will drive this ballast, or whether we
suggest changes to accommodate the different ballast type.

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Three More Module Configurations
DND20/126-1
This is a non-dim module used where there is a requirement to provide a 20-amp
circuit from the dimmer cabinet to a load that is never dimmed. This module fits
into one of the dimmer slots containing two 20-amp contactors used to turn on
and off their connected loads.
XDND20/126-1
This is also a non-dim contactor only module. It operates exactly like the unit
above except the contactor is a normally closed type. This unit is used in an
emergency section of a dimmer cabinet. When the normal power to this unit fails
the contactors fall closed, causing the emergency lights to come on to full
brightness and remain so until normal power returns to the dimmer cabinet.
F20-120U/136-1
This is a “Universal” fluorescent dimmer for solid state high-frequency ballasts. It
is designed to operate the fluorescent dimmers using two low-voltage control
wires and 0VDC to +10VDC control. It will also operate the line voltage dimming
type dimmer ballast like the Advance Mark X ballasts. It is also designed to dim a
series of dimmer ballasts called HiLume and EcoDim made by the Lutron company
that control differently than other dimmer ballasts on the market. The F20-120U/
136-1 dimmer module can drive these ballasts. It has two output terminals. One
provides the 120V line voltage and is switched On or Off. The other output
terminal provides a symmetrical phase-controlled dimmer output with a low end
limit as required to drive these ballasts to different light outputs. The F20-277U/
136-1 is also available, which is the same dimmer designed to operate 277VAC
ballasts of the same types named above.
Checking the Module Programming in a Dimmer
Cabinet
To determine how the modules are programmed in the dimmer cabinet, check the
module programming:
1Make sure the unit is turned on and in normal operation.
2Press the UP button located under the LCD display.
The LCD display shows MENU SETUP, with MENU flashing.
3Press the UP button a second time.
The LCD display shows MENU MODULE STATUS.
4Press the SELECT button.
The LCD display shows how the first half of the first dual dimmer is
programmed.

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Module programming information is displayed in a two-line format, as in the
following example:
The above example indicates Module 01A, which is normally a dual dimmer, and
the A portion of that dimmer is set to 50% of full brightness. DM indicates that it
is set up as a basic dimmer.
Dimmer Types
The following dimmer types can be set up:
•DM. A basic dimmer meant to drive incandescent lamps, quartz halogen lamps,
stepdown transformers for low voltage incandescent lamps, and neon or cold
cathode low power factor type transformers. If a “High Rise Time” dimmer” is
used for an incandescent circuit, it occupies one whole module space. The
software sees it is as a dual dimmer, and you must not assign or try to use the
B position of that module.
•M7. The module is set up to drive a dimmer ballast requiring that the 120V
power to the ballast be turned on and off, and the control for the ballast is a
signal voltage varying from 0VDC to +10VDC. That low voltage control signal
is found on a terminal strip at the top of the control printed circuit board as a
small screw terminal for the control wires to terminate. The wires from the
ballasts are normally gray and purple, and these color indicators are shown
there. Assuming that these dimmers were assigned in order, the control wire for
the first M7 dimmer will be the first control terminal, and the second M7
dimmer will be the second terminal, even though there are other dimmers of
different types in between. Inserting a new M7 dimmer at a later time will
require renumbering dimmers, or the control wires will fall out of order.
•HL. This module contains a single dimmer that is set up to drive the Lutron
HiLume and EcoDim dimmer ballasts. This module takes up one whole module
space. The software sees this as a dual dimmer, but you must not assign or try
to use the B position.
•NA. The slot is blank. No module is present, or no module has been identified
as present in this location, however it will operate as a DM slot.
•TU. The output is set up to drive the Lutron TuWire dimming ballast. It wires
the same as the Advance Mark X ballast, but requires a different low light limit
setting which is automatically provided whenever the TU setting is chosen.
•MX. The dimmer is set up to drive an Advance Mark X dimmer ballast, and the
software automatically provides the proper low light limit as required for that
ballast type. The ballast requires only two power wires for control; a dimmed
line and a neutral.
MOD 01A = 50% DMMOD 01A = 50% DM
INPUT=LUMANET SINPUT=LUMANET S
Module number
Portion of dimmer set to this percent brightness
Percent of full brightness (FL for 100%)
Dimmer type
Whether dimmer can accept more than one
input type (blank if Luma-Net only)
Type of signal driving this half of module
(could be LUMANET or DMX512 or ANALOG)

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•ND. The module is set up for On/Off operation only. As the input signal
approaches 40% the module switches full On. When the input falls below about
38% it switches Off. The slight difference in level is called hysteresis and is
used to prevent chattering at the switching point.
•LV. A normal dimmer but with a low-end cutoff. This can be useful for certain
load types such as driving a stepdown transformer for low voltage lights where
a complete turnoff is needed at some low light level.
By pressing the UP button, you can step through each of the nine
modules to determine how they are programmed, if they are receiving an
input, and the source of that input. If a dimmer is being driven from two
inputs (for example Luma-Net and DMS512), whichever input is higher
has control, and that name appears.
This controller is capable of controlling up to 24 dimmers. In many of the MDS
dimmer cabinets there are more than 24 dimmers, so you may find more than one
controller electronic module. Each of these is capable of controlling another group
of 24 dimmers. A cabinet containing 70 dimmers would require three of these
electronic circuit cards providing a total of 72 available channels.
Changing a Module Type
Changing a module type involves the use of a password (setup code) to prevent
unauthorized changes of vital data within the digital module. The factory default
password is 0000.
If the password is lost or forgotten you will have to contact the factory to
regain access to your system setup menus. If your system normally
resides in a locked electrical room it may be best to keep the default
password.
To access the module you want to change:
1Press the UP button until Menu Setup appears on the LCD display.
2Press the Select/Save button.
Enter Setup Code 9999 appears on the LCD display.
3Press the UP or DOWN buttons to change the 9999 to the actual
password (setup code).
Note: If it has not been changed use 0000.
4Press the Select/Save button.
The LCD display shows SETUP MENU SETUP MODULES?.
5Press the Select/Save button to access the first module.
The setup module display for module 01A appears flashing; the number is
the module number, the letter (A or B) is the channel within the module.
6Press the Select/Save button to access that channel of the module,
or press the UP button to move to another channel of another
module.
SETUP MOD 01A DMSETUP MOD 01A DM
TYPE DUALTYPE DUAL

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Once you have reached the module you wish to change:
1Press the Select/Save button.
The number stops flashing, and the module type starts flashing.
2With the type flashing, press the DOWN button until the LCD display
shows Function = Dimmer.
3Press the Select/Save button.
Dimmer flashes.
4Press the UP or DOWN buttons to scan through the functions.
5Press the Select/Save button to select the desired function.
The flashing moves from Function to several choices of dimmer types.
6Press the UP or DOWN buttons to select a dimmer type
7Press the Select/Save button.
8Press the UP button to move on to another channel,
or press the Cancel/Clear button three times slowly to return to the to-
level menu.
Assigning Luma-Net and/or DMX512 Channels
The digital control board can assign dimming channels to various Luma-Net and/
or DMX512 control channels within the software; no wiring changes are
necessary.
Assigning Numbers Automatically
For a simple configuration, the first control channel number is defined as a
system-wide address (the factory default is 0001), and the system automatically
assigns the control channel numbers in numerical order to the dimming zones
(dimmers) within the dimmer cabinet. If a second dimmer cabinet is connected,
its system-wide address can be set (to 0019, for example), and the dimming
zones (dimmers) are assigned beginning with that number.
To change the system-wide addresses:
1Press the UP button until the LCD display shows Menu Setup.
2Press the Select/Save button.
The LCD display shows Enter Setup Code = 9999.
3Press the UP and DOWN buttons to change the 9999 to the
actual setup code.
The unit is unlocked so changes can be made.
4Press the Select/Save button.
The LCD display shows Setup Menu Setup Modules?.
5Press the DOWN button once to set up the Luma-Net start address,
or press the DOWN button twice to set up the DMX512 start
address.
6Press the Select/Save button.
The flashing moves from the description to the number.
SETUP LUMANETSETUP LUMANET
START ADD = 001START ADD = 001
SETUP DMX 512SETUP DMX 512
START ADD = 001START ADD = 001

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7Press the UP and DOWN buttons to change the flashing number
to the desired new address.
8Press the Select/Save button to store the new address.
The flashing returns to the description.
9Press the Cancel/Clear button twice.
You return to the top level menu.
Assigning Individual Channels
You might need to assign channels in a sequence other than the automatic
assignment described above. This can happen when single rather than dual
dimmers are installed, and you do not want to lose the continuity of the
numbering system due to the loss of the second module channel. You might want
to double up dimming channels on a given control channel. Or, it could be due to
the requirements of multiple-room control stations.
After completing most of the assignments using the system-wide method
described above, the individual dimming channels can be further modified using
the LCD display.
To select a dimming channel to modify:
1Press the UP button until the LCD display shows Menu Setup.
2Press the Select/Save button.
The LCD display shows Enter Setup Code = 9999.
3Press the UP and DOWN buttons to change the 9999 to the
actual setup code.
4Press the Select/Save button.
The LCD display shows Setup Menu Setup Modules?.
5Press the Select/Save button.
The LCD display shows Setup Mod 01A.
6Press the UP and DOWN buttons to change the dimming channel
to be modified (01A, 01B, 02A, etc.).
7Press the Select/Save button to select the dimming channel.
The flashing moves from the upper number to the lower description.
To modify the channel:
1Press the UP button twice to display the Luma-Net address,
or press the UP button three times to display the DMX512 address.
2Press the Select/Save button.
The flashing in the lower part of the display moves from the description to
the number.
3Press the UP and DOWN buttons to change the flashing number
to the desired new address.
4Press the Select/Save button to store the new address.
The flashing returns to the description.
5Push the Cancel/Clear button five times to return to the top level menu.
LUMANET ADD=0001LUMANET ADD=0001
DMX 512 ADD=0001DMX 512 ADD=0001

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Specifications
Dimmer cabinet capacity Virtually unlimited; you continue to add
more cabinet sections
Dimensions for surface-mount
cabinets
50" high x 11" deep; width as required
Dimensions for floor standing
cabinets
90” high x 20” deep; width as required
Conduit entry Sides and bottom
Convection Cooled No fan noise
Ambient operating temperature 32 oF to 104oF
Maximum operating humidity 90% non-condensing
Nominal 120V circuits 120/208V, 3Ph, 4W, 60Hz
120/240V, 1Ph, 3W, 60Hz
Nominal 240V circuits 240/415 V, 3Ph, 4W, 50/60 Hz
Nominal 347 V circuits 347/600 V, 3Ph, 4W, 60 Hz
Phase to neutral operating voltage Nominal Voltage ±10%
Operating frequency 60 Hz ±5 Hz (50Hz Available)
Cabinet type Nema type 1 for indoor use only;
available for surface or floor mounting
Control inputs Luma-Net, DMX-512, 0 to +10 VDC
Square law curve control Yes
Top, bottom, right side feed Yes
Fully connectorized dimmer
modules
Yes
Dimmers available for Incandescent, LV stepdown
transformers, neon, cold cathode, high-
rise time, fluorescent dimmer ballasts,
0-10VDC controlled ballasts, Mark X,
Hi-Lume, quartz, and constant circuits
Operating efficiency Minimum 97%
Completely wired and tested as a
system before shipment
Yes
UL and cUL Listed Yes