Simplex 2120 Configuration guide

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CAUTION
ELECiRlCAL HAZARD
Disconnect electrical power when making any internal
adjustments or rebairs. Installation and servicing
should be performed by qualified Simplex Representa-
tives.
CAUTION
POWERING REQUIREMENT
When removing payer from this system, disconnect
batteries FIRST and1AC power last. When connecting
power to this system. connect AC power FIRST and
batteries last.
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HOW TO USE THIS PUBLICATION
This publication provides information on 2120 Multiplex dual channel voice communications systems. Typical
equipment configurations are illustrated, as are specific interconnections between 2120 and 2001 equipment.
This manual is divided into the following sections:
l MAIN EQUIPMENT
l REMOTE EQUIPMENT
l CLASS A AUDIO FOR DUAL CHANNEL SYSTEMS
For More Detailed lnformation . . .
refer to the documents listed below.
2001 Voice Communications Wiring Diagrams
2001 Systems Troubleshooting Guide
2001 Voice Communications Module Descriptions
System interconnection drawings for the specific installation
Equipment cabinet drawings for the specific installation
INTRODUCTION
2120 Multiplex dual channel voice communications systems are similar to single channel systems. Both use 2001
voice communications equipment to provide their basic functions. However, a dual channel voice system has an
advantage over a single channel system: The dual channel system can transmit two different audio messages
to separate areas of a building at the same time. Simultaneous operation requires some special features:
l A set of SMPL programs that appropriately operate system speaker circuits.
l Two audio control modules.
l Two riser power preamps.
l Two audio risers.
AND
l (In certain applications) Special FABT or ET dual channel audio relay boards.
There are two basic configurations for 2120 dual channel audio systems (Figures 1A and 1B). The difference
between the two is the size of the SCC used. Figure 1A illustrates a system in which a lo-module SCC is used;
in this application, the two riser power preamps are located in the SCC cabinet (along with the microphone
enclosure assembly, if used).
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I
INTERFACE
,I sf$;ES TRANSFORMER 1 ,
r -----------------
1
L
AUDIO IN TO EACH
lNOlVlDUALAUDlORELAV
FABT
I I
AUDIO
CONTROLLER RELAY
BOARD BOARD
I I
REMOTE
AMPLIFIER
TO OTHER
VPBTS IN
-THE SAME
CABINET
SPEAKER
CIRCUITS TYPE t
I
TRAiSFORMER
CABINET (VPBT)
L--------------------4
BMUX AND SCC CABINETS
CLOSE-NIPPLED (SIDE BY SIDE).
I
BMUX see EVACUATE
AUDIO
CABINET CABINET
RISER
r ----- "
I
DUAL VOICE n EVACUATE ALERT
COMMUNICATIONS II POWER POWER 17
EOUIPMENT ‘1’ PREAMP PREAMP {’
ALERT
. AUDIO AUDIO
HARNESS RISER
2120 Dual Channel Voice Communications Block Diagram
(1O-Module SCC Only)
FIGURE 1A
2
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Figure 1B illustrates an application in which a 30-module SCC is used. If that SCC contains a microphone
enclosure assembly, then the two riser power preamps must be mounted in a close-nippled transponder cabinet.
r- _--_-__--------
-----1 I
l- _______ ----------,
I
I
L---------------------
CABWET
.i
2120 Dual Channel Voice Communications Block Diagram
(304odule SCC Only)
FIGURE 1B
Let’s look at the various components of the 2120 dual channel audio system. We’ll start with the main equipment.
I
Throughout this publication we will use 2001 product identification numbers for voice
communication equipment to make it easier for you to cross-reference 2001 voice
communications documentation.
3
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