®
PROFESSIONAL AUDIO & SOUND
DIGITAL MUSIC AMPLIFIERS 
DIGITAL
MUSIC SERIES
TM
INSTALLATION AND WIRING
MOH CONNECTIONS
Telephone
MOH
Input
600
Ohm
Telephone System
KSU
600 ohm MOH System
AWG 18 TWISTED PAIR
2
3
4
CAUTION: TO REDUCE THE |
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RISK OF FIRE, REPLACE |
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| ZONE 1 | ZONE 2 |
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ONLY WITH SAME TYPE |
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FUSE. | ZONE 1 | 0 600 0 8 | 0 | 8 |
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| LEVEL |
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| LEVEL | |
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| MOH OUT 1 WATT | 1 WATT |
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| BALANCED |
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| PROFESSIONAL AUDIO & SOUND |
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| DIGITAL MUSIC AMPLIFIER |
117V 500W MAX |
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| POWER RATING |
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| SUPPLY VOLTAGE | |
UNSWITCHED | COM 8 | 25V 70V | POWER CONSUMPTION |
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GROUND |
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| SENS |
117V 60HZ LINE FUSE | SPEAKER OUTPUT |
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5A 250V | CLASS 2 WIRING ACCEPTABLE | SER. NO. | |
3120 MOH Zone 1
MOH OTPUT LEVEL CONTROL
MOH - ZONE 1 INPUT SOURCE DEFAULT JUMPER SETTING
MODULE | AUX 1 | AUX 2 |
| JUMPER |
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| SW702 |
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Fig. 25 - Rear Panel MOH Connection Diagram
MUSIC ON HOLD AMPLIFIER
MOH AMPLIFIER
An independent 600 ohm, 1 Volt Output, Transformer Balanced
LEVEL CONTROL
After the wiring is completed adjust the MOH/ZONE 1 Amplifier Level Control on the rear panel to the desired output level (Reference 2).
MOH - 600 OHM SYSTEM
Most Phone systems operate on a 600 ohm Input Impedance, if the Impedance required is 600 ohm connect the Amplifier to the Phone System MOH by using the diagram above (Reference 3).
MOH - 8 OHM, 1 WATT SYSTEM
Some older Key Phone systems require a 1 watt Power Output having an Output Impedance of 8 ohm to drive the Music on Hold feature. If the Impedance required is 8 ohm connect the Phone system MOH to the 8 ohm, 1 Watt MOH Output of the Amplifier (Reference 4).
MOH/ZONE 1 AMPLIFIER SOURCE SELECTOR
MOH/ZONE 1 SOURCE SELECTOR
The Source for the MOH/ZONE 1 Amplifier can be selected from either the AUX 1 - AUX 2 or MODULE by setting the JUMPER SET No. SW702 provided for this purpose. Default Setting for this Jumper Set is AUX 1. To change the setting do the following:
ACCESS TO THE MOH/ZONE 1 INPUT SOURCE SETTING
CABLE
Use a cable consisting of a twisted pair of at least AWG 18. Use care in extending the cable and avoid routing near power lines, fluorescent lights and other systems that may generate a disturbing electric field.
SOURCE SELECTOR
Select the Input Source desired by following the instructions at right.
CAUTION: REMOVAL OF THE COVER PRESENTS AN ELECTRI- CAL SHOCK HAZARD !
1)Remove Power Cord from AC Outlet.
2)Remove the three screws on each side of the amplifier holding the amplifier cover.
3)Lift Cover and locate the Jumpers Set No SW702 on the MOH Amplifier Board (see Function Switches Jumpers Location Diagram).
4)Set Jumper as required (AUX 1 - AUX 2 or MODULE)
5)Replace protective cover.
DMS3040/3080/3120 | SPECIFICATIONS ARE SUBJECT TO CHANGE WITHOUT NOTICE | PAGE 25 |
