Variable Bright/Dim Lighting Controller
MSM295E
Product Description
The MSM295E is a two-channel variable bright/dim lighting
controller. The controller is designed to vary the intensity of lamps
used in reading, table, or other lighting situations. The twochannel design allows control of two lamps from a single
MSM295E. The unit uses a pulse width modulator circuit for power
efficiency. The controller has Master BRIGHT and DIM functions
that override the individual control inputs. There are no switch
controls for ON/OFF function of the individual or Master circuits.
Technical Specifications
Electrical
Power, Internal
Circuitry
2.5 A max at +28 VDC
100 mA Idle Current
Max Current
Ratings
1 A each CKT1 & CKT2
2 A both channels driven
Switch Contact In
< 1 VDC, Momentary
Ground
Status Out LED
Ground, 100 mA Max. Sink
Features
Variable Output
0 to +28 VDC
The following list provides an overview of features for the
MSM295E:
Master Inputs
< 1 VDC, Momentary
ground required
Dimensions
5.0”L x 5.0”W x 1.0”H
Mating Connector
DBMA-25S
Weight
7.2 ounces / 201.6 grams
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Dual circuits in one unit for control of two lamps
BRIGHT/DIM variable lighting functions
Light ON/OFF function is not available except by application
and removal of power
Two input controls (BRT, DIM) for each circuit
Output to light the status annunciator LED in a switch panel
when lamp is ON
Master circuit controls BRIGHT and DIM for both individual
circuits
Lightweight, compact size
Solid state circuitry
Mechanical
Application Notes
1.
2.
3.
4.
5.
The MSM295E is designed with two independent circuits
(CKT1 and CKT2) for the control of BRIGHT and DIM light
functions. A master circuit controls both of the independent
circuits.
The controller powers up in the ON position and DIM state.
ON/OFF function is not available except by application and
removal of power.
The BRIGHT and DIM functions are only active when the
circuit is ON. Variable output is controlled by applying
momentary ground on the BRIGHT or DIM inputs until the
desired light intensity is obtained.
The master inputs control the BRIGHT and DIM functions of
CKT1 and CKT2 using momentary ground application to vary
the output levels.
Installation Guidelines
1.
2.
All power, input, output, and ground wires must be 22 AWG
minimum. Ground wires must be grounded within twelve
inches of the unit.
Protect power wires with circuit breakers or fuses located
close to the electrical power source bus.
Drawings
530045
Description
MSM295E Specification Drawing
Document # 530119A – Revision History
Level
Date
IR
7/1998
Initial Release
Description
A
8/1999
Update features, correct power / weight
PROPRIETARY NOTICE
Despite any copyright notice, this data and information
disclosed herein contains confidential, proprietary designs owned
by Audio International, Incorporated. Neither this data nor the data
contained herein shall be reproduced, used, or disclosed to
anyone without the written authorization of Audio International, Inc.
Audio International, Inc. • 7300 Industry Drive, N Little Rock, AR 72117 • Phone 501-955-2929 / Fax 501-955-2988 / www.audiointl.com