Instruction manual

P83259 H
Sheet 8 of 26
Figure 5:
Two Central Amplifiers, one for paging and one for background music.
(One Way and/or Optional Talk-Back Paging)
In this application, two central amplifiers are used, one for paging and one for background music. The system uses speakers
with built-in line matching transformers for both One Way paging, and paging with optional Talk-Back.
MUSIC
SOURCE
POWER
SUPPLY
24VDC
25V/70V/100V
GND (+)
ZONE 1
FROM TELEPHONE *
CENTRAL
AMPLIFIER
WITH TRANSFORMER
+
-
TYPICAL SPEAKER
BACKGROUND
TYPICAL SPEAKER
WITH TRANSFORMER
AMP. 1
MZC-144
AMP. 1
SYSTEM
ZONE 12
(-) 24VDC
OUT
IN
(PAGING)
MUSIC
ZONE 1
ZONE 2
ZONE 3
MUSIC
ZONE 4
ZONE 5
ZONE 6
MUSIC
ZONE 7
ZONE 8
ZONE 9
ZONE 10
ZONE 11
ZONE 12
GROUP 1
MZEM-3
#1
GROUP 2
MZEM-3 #2
GROUP 3
MZEM-3
#3
GROUP 4
MUSIC
P
A
LINE MUSIC
(SEE NOTE 1)
PRM-150
OPTIONAL
PREAMPLIFIER
(MUSIC)
AMPLIFIER
CENTRAL
(SEE NOTE 2)
LINE MUSIC
OUT
IN
A
25V/70V
*NOTE: Use Tip CO and Ring CO for stand alone telephone, unused CO line/trunk port, or 600 ohm audio page port
connections.
NOTES:
1. If both the music central amplifier and the background music source have no volume controls, then a PRM-150 must be
connected between the background music source output and the line music input.
2. In systems with optional Talk-Back paging, install one background music source only as shown. DO NOT connect
background music source directly to zone group music inputs as improper operation may result.