Ii_DM 100

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HID Bi-Level Control Module
For fixtures with CWA transformers and non-encased capacitors,
using Metal Halide, Metal Halide (Pulse Start) or High Pressure
Sodium lamps between 175-1000W

Model#s:
DM-100-250H
DM-100-400H
DM-100-1000H
DM-100-175M
DM-100-250M
DM-100-400M
DM-100-1000M
DM-100-200MP
DM-100-250MP
DM-100-320MP
DM-100-350MP
DM-100-400MP
DM-100-750MP

SPECIFICATIONS
For indoor use only
For use with CWA (Constant Wattage Autotransformer) ballasts only.
Lamps . . . . Metal Halide, Metal Halide (Pulse Start) and High Pressure Sodium
Load Ratings:
Metal Halide (MH). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 175–1000W
Metal Halide, Pulse Start (MHPS) . . . . . . . . . . . . . . . . . . . . . . . 200-750W
High Pressure Sodium (HPS) . . . . . . . . . . . . . . . . . . . . . . . . . 250–1000W
Relay Rating . . . . . . . . . . . . 15A (zero crossing high to low and low to high)
Current Consumption . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18mA max.
Total Current Output. . . . . . . . . . . . . . . . . . . . . . . . . . 15mA max. @ 24VDC
Maintained signal voltage to trigger (low to high) . . . . . . . . . . . . . . . . . 12µA
Lamp warmup upon power-up. . . . . . . . . . . . . . . . . . . . . . . . . . . 15 minutes
Operating Temperature Range . . . . . . . . . . . . . . . . . . -10–113°F (-23–45°C)
Operating Humidity Range. . . . . . . . . . . . 0%–95% relative, non-condensing
Weight . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . < 2lbs
Dimensions . . . . . . . . . . 3.75"H x 5.75"W x 4.75"D (95.25 x 146 x 121mm)
Leads . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 feet

Installation Instructions

DM-100

BOX CONTENTS

NOT SUPPLIED

•

DM-100 Bi-Level Control Module (1)

•

•

Installation instructions (1)

20AWG 3- or 4-conductor jacketed wire*
(for connecting DM-100s together)

•

Fixture balancing and mounting hardware
(if necessary)

•

Conduit and hardware

Accessory bag:
• Lock-ring (1), wire nuts (2)

*Depends on installation requirements.
Call Technical Support for specific recommendations.

DESCRIPTION
The DM-100 is a control module which is used to switch HID (High Intensity Discharge) lamps
from high to low and from low to high. The DM-100 bases its bi-level switching on signals
received from a controlling device (see “Controlling Devices” below).
With the DM-100 and an occupancy sensor, HID lighting will switch to a lower, energy saving
light level (high to low) after a space becomes unoccupied. Then, as soon as the space is
occupied, lighting will return to full brightness (low to high).
Upon initial power up of HID lamps, or after a power failure or phase drop, the DM-100 supplies full
power for a 15 minute lamp warm-up. Then lighting will either remain at full level if the space is
occupied, or go to low level if unoccupied.
The DM-100's bi-level switching avoids the warm-up problem otherwise found when controlling
HID fixtures. The switching is immediate and lights are no longer left on at 100% when lighting is not
needed. This saves energy and adds convenience.
Controlling Devices:
• One or more controlling devices (such as occupancy sensors, time switches, photocells, etc.)
must be used to control a DM-100. The control to this DM-100 can be extended to other
DM-100s by connecting them into control groups (see Control Wiring section).
•

A controlling device must:
1. Have its own power supply or be able to be powered by the +24VDC output from a DM-100.
2. Provide a +24VDC control output to a DM-100 in the controlled group.

DM-100 MOUNTING OPTIONS
The DM-100 attaches to the ballast hanger/ junction box, with a threaded 3/4" nipple. It can be
mounted directly to the box through a knockout hole. The DM-100 can also be mounted up to
six feet away and connected with conduit.
Mounted to
to
Mounted
Junction Box
junction box

Mounted
Mounted
Separate
separately

Hanger/
Junction
Box

up to
6 feet

DM-100

Hanger/
Junction
Box

DM-100

Conduit
Splice

HID Ballast
Housing

HID Ballast
Housing

MB-2
sensor
MB-2
brackets
Sensor
Brackets
Reflector Bell

Reflector Bell

Visit our website for FAQs: www.wattstopper.com

INSTALLATION AND WIRING

≠ DANGER: HIGH VOLTAGE ≠
• EQUIPMENT DAMAGE, PERSONAL INJURY AND DEATH CAN RESULT FROM
IMPROPER PROCEDURES AND INSTALLATION.
• ONLY PERSONNEL QUALIFIED TO WORK WITH HIGH VOLTAGE AND CAPACITOR
DISCHARGE SHOULD INSTALL THIS UNIT.
• TURN THE POWER OFF TO THE HID FIXTURE AT THE CIRCUIT BREAKER
BEFORE BEGINNING INSTALLATION.
1. IMPORTANT: Verify that the ballast is a CWA (Constant Wattage Autotransformer) and that
the DM-100 model# is correct for the lamp ANSI and original capacitor rating (see Ordering
Information section).
2. Unplug and move the HID light fixture to a stable, secure work area.
3. DANGER: The fixture’s capacitor may contain a stored high voltage charge. Carefully open
the ballast housing so that the ballast and capacitor are easily accessible.
Follow proper safety procedures to discharge the installed capacitor inside the ballast housing.
4. Open a 3/4" knockout hole in the ballast hanger box where the DM-100 will attach (either
directly or by conduit):
If
-

connecting directly to the box:
Thread the DM-100’s wires into the knockout hole and through the 3/4" lock ring (supplied).
Secure the DM-100’s threaded nipple on the inside with the lock ring.
Thread the DM-100’s wires down into the ballast housing.

If
-

connecting with conduit:
Thread the DM-100’s wires into and out the other end of the conduit.
Attach the conduit to the DM-100’s threaded nipple.
Thread the DM-100’s wires into the knockout hole and secure the conduit to the knockout hole.
Thread the DM-100’s wires down into the ballast housing.

5. Disconnect the wires from the original capacitor. Cut off the end connectors and strip the
wires. NO CONNECTIONS WILL BE MADE TO THE ORIGINAL CAPACITOR.
6. With a supplied wire nut, connect one of the black wires from the DM-100 to one of the
wires that was disconnected from the original capacitor (it doesn’t matter which one).
Connect the other DM-100 wire to the remaining disconnected wire (see the wiring
diagrams on the next page).
7. Reassemble the ballast housing, being careful not to pinch wires.
8. An occupancy sensor can be attached to the reflector bell at this time or after the fixture is
rehung.
9. Replace the fixture with the installed DM-100 and occupancy sensor back to the fixture’s
mounting location. Balance the fixture, if necessary.
10. If the DM-100 is mounted separately, secure it to its location.
11. Reconnect the power cord to the fixture (power should be off).
12. Once the steps above are completed, continue to the Control Wiring section.
(DM-100 Installation and Wiring continued next page)

Call 800.879.8585 or 972.578.1699 for Technical Support

DM-100
WIRING
DM-100 WIRING

Ballasthanger/
Hanger/
Ballast
Junction
Box
Junction
box

2

THE DM-100 CONNECTS TO BALLAST WIRES.

BALLAST

WIRES FROM BALLAST ARE CUT AT THE
ORIGINAL CAPACITOR TERMINALS.

Bi-level
Bi-Level
capacitor
Capacitor

LockRing
ring
Lock

DANGER!: HIGH VOLTAGE FROM ORIGINAL CAPACITOR
MUST BE SAFELY DISCHARGED.
1

DM-100
DM-100

Controller
Controller board
Board

WARNING!: THIS DIAGRAM IS FOR ILLUSTRATION ONLY.
READ ALL INSTRUCTIONS BEFORE PERFORMING
INSTALLATION OR WIRING.

Original
Original
capacitor
Capacitor

1
2

Ballast
Ballast
Housing
housing

DM-100
connection
DM-100
connection

Typical
TypicalCWA
CWAcircuit
circuitfor:
for:
Metal
Halide
lamps
Metal
Halide
lamps

DM-100

LINE V

CAP

CAP

LAMP

LINE V

LINE V

CAP

LAMP

CAP

LINE V

LINE V

LINE V
HID
LAMP

LINE V

COM

HID
LAMP

LINE V

COM

COM

COM

DM-100
connection
DM-100
connection

Typical
CWA
circuit
Typical
CWA
circuit
for: for:
Metal
MetalHalide
Halide(Pulse
(PulseStart),
Start)oror
HighHigh
Pressure
Sodium
Pressure
Sodium
LINE V

LAMP

LINE V

LAMP

DM-100
LINE V

LINE V
X3

X1

X3

LINE V

X1

LINE V
IGNITOR

LINE V

X2
CAP

CAP

IGNITOR
HID
LAMP

LINE V

CAP

COM

X2
CAP

COM

COM

COM

DM-100 connection

Typical CWA circuit with Quartz Restrike
LINE V

CAP

HID
LAMP

CAP

LAMP

LINE V

LAMP

DM-100

LINE V
X3

LINE V

X1

X3

LINE V
120 V

X2
CAP

CAP

HID
LAMP

IGNITOR
120 V

CAP

COM

RESTRIKE
LAMP

X2
CAP

COM

RESTRIKE LAMP
CONTROLLER

X1

LINE V

IGNITOR

CAP

CAP

COM

COM

RESTRIKE
LAMP

Visit our website for FAQs: www.wattstopper.com

RESTRIKE LAMP
CONTROLLER

HID
LAMP

CONTROL WIRING
After the DM-100 is installed and the fixture has been remounted, low voltage control wire
connections can be made to the terminal block, located on the side of the DM-100.
Make connections before the fixture’s power is restored. When all connections are made,
continue to the Testing section.
DM-100 Terminal Block
5

DM-100

CONTROL OUT
(to CONTROL IN on other DM-100s)

To continue this control configuration,
connect to other DM-100's CONTROL IN terminal
(max. 20 linked DMs when using this terminal)

4

CONTROL IN

3

(3&4 COMMON)
(+24VDC CONTROL SIGNAL IN)

2

COMMON

Connects all DM-100s in a controlled group

1

+24VDC OUT

+24VDC SUPPLY OUT

5
4
3
2
1

+24VDC Control input from controlling device/s and/or
from CONTROL OUT from DM-100s (terminals 3 and 4 are common)

To insert or remove wires: Use a small flat-blade screwdriver to
push in the plunger, insert wire, then release plunger (see left).
If using stranded wire, make sure all the strands are inserted.
IMPORTANT: Verify that enough insulation is removed (3/8"–1/2") at
the end of wires so that when inserted, a proper connection will be
made.

Occupancy sensors: (typical connections)
5

1. Connect the sensor’s +24VDC Input lead to
the +24VDC OUT on the DM-100.

4

24VDC Control Output from Sensor

2. Connect the Common lead from the sensor
to the COMMON on the DM-100.
3. Connect the Control Output lead from the
sensor to a CONTROL IN on the DM-100.

2

+24 VDC Out to Sensor

Sensor

ISOLATED RELAY
Normally Open

Connect To:
+24VDC Out

Common (Isolated Relay)

1. Connect the switch’s +24VDC Input and
Common leads to the DM-100 as for the
occupancy sensor above, or to a power
pack from The Watt Stopper.

1

DM
DM
Terminal
Terminal
Block
Block

Occupancy
Sensor
Occupancy

Time switch: +24VDC powered with an isolated
relay (typical connections)

2. Connect the isolated relay’s Normally Open
lead to 24VDC OUT and its Common lead to
CONTROL IN on the DM-100.

3

Common (Return) from Sensor

Control In

on DM

Normally Closed

Return (Common)
+24VDC IN

Common
+24VDC Out

on DM or
Watt Stopper
power pack

Time Switch
Switch
Time

Large Zone Control:
DM-100s can be connected to control more than 100 lighting fixtures. When one or more
controlling devices are used in large zone control applications, the following recommendations
and wiring diagram should be followed:
• To avoid voltage drop issues:
• Use the heaviest gauge wire possible. We recommend 18-20AWG.
• Wire the DM-100s serially and sequentially to avoid long wire runs.
• If the controlling device is located a long distance away from the controlled zone, test the

installation first with only a few DM-100s to ensure there are no problems.
(Large Zone Control continued next page)

Call 800.879.8585 or 972.578.1699 for Technical Support

Large Zone Control: (cont’d)
Note: Contact Technical Support for assistance or clarification regarding these instructions. For
recommendations on how to lay out a specific project, request a custom wiring diagram from
Technical Support.
Sample configuration:

Controlling Device

Small Control Groups:
•

A controlling device can be extended to other DM-100s by linking the DM-100s together
into a control group.

•

A control group starts from the first DM-100 connected. All other DM-100s connected to this
DM-100 (radially or in a series) are part of this group and controlled by the originating
device(s).

•

Groups can overlap. DM-100s can be part of more than one control group.

•

When multiple controlling devices are used, only one signal is needed to turn the DM-100s
to high.

Sample configuration:
Controlling Device
Controls Group "A"

Controlling Device
Controls Group "B"

Controlling Device
Controls Groups
"B" and "C"

Group
"B"“B”
Group

Note: When using the small
control group wiring example, no
more that 20 fixtures can be
connected together per group.
The same recommendations apply
to small groups as to large groups.

Group“A”
"A"
Group

Controlling Device
Controls Group "C"

Group
"C"“C”
Group

OCCUPANCY SENSOR BRACKET
The MB-2 occupancy sensor bracket allows sensors to be mounted to the rim of metal HID
reflector bells (with no installed covers).
This bracket secures to the rim with three clamping screws and has an adjustable mounting
plate that allows rotation of the sensor to a desired angle for optimal coverage.
The MB-2 bracket is designed to be used with CX and CI sensors. The bracket comes with an
extension wire to connect the sensor to the DM-100, as well as mounting screws to attach the
sensor to the bracket. A bubble level is attached to the bracket to assist accurate sensor
adjustment. (See separate MB-2 installation instructions).
MB-2

HID reflector bell
of
Top
05

or

33¡

sens

CX-1

CX-105

Visit our website for FAQs: www.wattstopper.com

CI-205

TESTING
1. After the installation is complete and checked, turn on the main power to the fixture circuits
and turn on any controlling switches.
Note: The DM-100s will supply full power to the HID lamps for 15 minutes for the lamp
warm-up. After the warm-up time has elapsed, the lamps can go to low.
2. To test occupancy control: Lamps that are controlled by an occupancy sensor will go to
low if no occupancy has been detected and the sensor’s time delay has elapsed. Turn off all
other controlling devices to the sensor controlled lamps. Set the time delay on the sensor to
minimum, then move into the coverage area for the sensor, and remain still until the time
delay elapses. The lights should go to low.
3. To test switch control: Turn the switch off. If occupancy sensors are also controlling the
DM-100s, remain still and allow the time delay to elapse. Turn the switch back on and the
lights should go to high.
4. Verify that other on/off input devices turn the lamps to low, as desired.

TROUBLESHOOTING
General checks:
• Terminal block wires make proper contact.
• Terminal block wires are connected to the correct terminals.
• High voltage DM-100 wires are securely connected.
• Wiring of switch, occupancy sensor or other controllers to the DM-100 terminal block are correct.
• Occupancy sensor adjustments needed: sensitivity and light level (if applicable), alignment.
• Light level detector (photocell), if any, adjustment needed.
Lights do not turn on:
• Check breakers, fuses.
• Check photocells for proper adjustment and orientation (if installed).
• Check occupancy sensor detection.
• Make sure switches and control systems are on.
• Make sure HID fixtures are plugged in.
• Follow proper high voltage safety procedures and check wiring and connections in the ballast
housings.
Some lights in a DM-100 group turn on, but others do not:
• Check the DM-100 connections to a fixture that does not turn on in a connected group.
- Verify that proper wire contact is being made in the terminal block.
- Verify that connections are made to the correct terminals.
• Verify that the bulb has not burned out.
• Make sure you follow the recommendations found in the Control Wiring section.
All
•
•
•
•

lights in a DM-100 group remain full on:
Something is giving an ON input to the DM-100s.
Check switching controllers and systems, as well as connections, to the DM-100s.
Check photocells for proper adjustment and orientation (if installed).
Check occupancy sensor detection.

Lights remain dimmed:
• The ON input from controllers is not reaching the DM-100 group.
• Check switching controllers and systems, as well as connections, to the DM-100s.
• Check photocells for proper adjustment and orientation (if installed).
• Check occupancy sensor detection.
All lights turn off:
• The main power is being turned off to the lights. The main power should be turned off only when
intending to completely turn off the lights. Remember, there is a restrike/warm-up period before
the lights will return to full brightness.
Occupancy sensor is not detecting motion:
• Refer to the sensor’s installation instructions for proper adjustment and troubleshooting.

ORDERING INFORMATION
Recommended Capacitance
Level 1
Level 2 Total

Part Number

Fixture/Ballast/
Lamp Type

ANSI
CODE

Standard
Cap. (uF)

Voltage
(Non
Bi-level)

DM-100-250H (M)

250 Watt HPS

S50

35

280

27.5

7

35

300

28

7

35

280

42

12

54

DM-100-250H (A)
DM-100-400H (M)

400 Watt HPS

S51

55
55

300

40

15

55

400 Watt HPS

S51

48

280

38

9

47

48

300

38

9

47

1000 Watt HPS

S52

26

525

18

8

26

26

525

17.7

8.3

26

175 Watt MH

M57

10

400

7.5

2

9.5

10

400

8

2

10

250 Watt MH

M58

15

400

10

4.2

14.2

15

400

9

6

15

400 Watt MH

M59

24

400

16.5

7

23.5

24

400

15

9

24

1000 Watt MH

M47

24

480

17

6.8

23.8

24

480

15

9

24

200W MH, PS

M136

15

525

10

5

15

21

330

11

10

21

DM-100-400H (A)
DM-100-400H (M)
DM-100-400H (A)
DM-100-1000H (M)
DM-100-1000H (A)
DM-100-175M (M)
DM-100-175M (A)
DM-100-250M (M)
DM-100-250M (A)
DM-100-400M (M)
DM-100-400M (A)
DM-100-1000M (M)
DM-100-1000M (A)
DM-100-200MP (A)
DM-100-200MP (VN)
DM-100-250MP (M)

34.5

20

400

15

5

20

DM-100-250MP (M)

250W MH, PS

M138

24

330

18.5

5.5

24

DM-100-250MP (A)

24.5

400

17.5

7

24.5

20

400

15

5

20

22.5

330

15.3

6.9

22.2

DM-100-320MP (A)

21

345

13.1

7.9

21

DM-100-320MP (VN)

22

330

14

8

22

DM-100-320MP (VO)

19.5

360

13.5

6

19.5

DM-100-250MP (VN)
DM-100-320MP (M)

DM-100-350MP (M)

320 Watt MHPS

350 Watt MHPS

M132

M131

24

330

16.5

7

23.5

22.5

345

14.4

8.1

22.5

DM-100-350MP (VN)

24

330

16

8

24

DM-100-350MP (VO)

20.5

370

14.5

6

20.5

DM-100-350MP (A)

DM-100-400MP (M)

28

330

19.5

8

27.5

DM-100-400MP (A)

26

330

18.5

7.5

26

DM-100-400MP (VN)

26

330

17

9

26

DM-100-400MP (VO)

24

370

16

8

24

24

440

16.5

7

23.5

DM-100-750MP (M)

400 Watt MHPS

750 Watt MHPS

M135

( ) denotes ballast manufacturer. (A) = Advanced; (M) = Magnetek; (VN) = Venture (new); (VO) = Venture (old)
Note: Call Technical Support at 800.879.8585 for ordering information on non-standard fixtures or capacitor combinations
not listed above.

WARRANTY INFORMATION
The Watt Stopper®, Inc. warranties its products to be free of defects in materials and
workmanship for a period of five (5) years. There are no obligations or liabilities on the part of
The Watt Stopper, Inc. for consequential damages arising out of, or in connection with, the use
or performance of this product or other indirect damages with respect to loss of property,
revenue or profit, or cost of removal, installation or reinstallation.

Putting a Stop to Energy Waste®
2800 De La Cruz Boulevard, Santa Clara, CA 95050
Technical Support: 800.879.8585 • 972.578.1699
www.wattstopper.com
00567 r5

Model Number: DM-100

Approval Date:

Referred To: _________________

DM-100 Sales Qualification Questionnaire
UPON COMPLETION, PLEASE FAX BACK TO: (972)-422-1311.
Attention:

Phone#:

Company:

Fax #:

Project Name:

Quantity:

PO#

The DM-100 is specific to the type and wattage of the HID fixture. To ensure that we can match
your fixtures with the appropriate DM-100 HID Bi-Level Controller, the following questions must
be answered completely. You will find the information requested below on the fixture label or
inside the ballast housing. Due to variation between fixtures, this information should be verified on
every fixture.

*Ballast Information:
This information is necessary to ensure we offer a DM-100 that matches your fixtures.

CWA Type (Circle)

Yes

No

The DM-100 will ONLY work with a CWA type ballast.

Manufacturer

___________________________________

Model Number
Capacitor Information:
Manufacturer

___________________________________

Model Number

___________________________________

Microfarad (uF) Rating

___________________________________

Voltage Rating

___________________________________

___________________________________

Potted (Circle)

Yes

No

In order to bypass the existing capacitor, the capacitor wiring needs to be accessible.

Fixture Information:
Manufacturer

___________________________________

Model Number

___________________________________

ANSI Code

___________________________________

Type (Circle)
Mounting Strategy (circle):
Remote Mounted

Metal Halide

High Pressure Sodium

Metal Halide Pulse Start

Fixture Mounted

The balancing hardware will be required if the DM-100 is mounted to the fixture.

Control Strategy (circle):
Occupancy Sensor

Daylighting

Time Based

* INFORMATION REQUIRED.

From: The Watt Stopper Telephone: 1-800-879-8585

Manual



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