15
Installation and Maintenance Manual
Model 300MB-SD CommCenter Series D1
Interfacing with a Central Amplified System
See Figure 9. In this installation the CommCenter is acting as an audio input to a central amplifier.
Message playback can be added to an existing centrally amplified paging system.
Figure 9 Model 300MB with central amplifier connections
GROUND
290A7334
10
1
1716
1
TB2
TB1
GAIN
CNTR
MODEL 300MB
CENTRAL AMPLIFIER
SIGNAL LINES
SHIELDED
TWISTED PAIR
120/240 Vac
TB1-16
TB1-17
SIGNAL COMMON
MICROPHONE OUT
TO ADDITIONAL SPEAKERS,
40 OHMS MAXIMUM LOAD
AUDIO INPUT
As a Typical Central Power System
See Figure 10. In this installation a 24 Vdc power supply, such as a Model PS600, is driving the
CommCenter and one or more speakers. For additional information, including jumper removal, see
"For 24 Vdc Operation" under "Connecting Power to the CommCenter System" on page 16.
Figure 10 Typical central power system
290A7517
GROUND
10 8 7
1
15
1
TB2
TB1
GAIN
CNTR
MODEL 300GC
24 Vdc
MODEL 300MB
AM25CK
120/240 Vac
NOT USED WITH THE MODEL PS600
24 Vdc
POWER SUPPLY
+
–
–
SIGNAL LINES,
SHIELDED TWISTED PAIR
+
OUTPUT
POWER
LINES
16
17