17
Installation and Maintenance Manual
Federal Signal
www.fedsig.com
Typical Installations of the 300MB
Figure 7 Model 300MB with remote microphone and message playback
GROUND
290A7517
10
1
17 16
10 8
1
TB2
TB1
GAIN
CNTR
4 5
1
7
12 13 14
17
16
TB1
TB2
MODEL 300GC
MODEL 300VCS-1
120 VCA
MODEL 300MB
MODEL AM25CK
SIGNAL LINES
SHIELDED
TWISTED PAIR
120/240 Vac
120 Vac
120 Vac
120 Vac
LOCAL
POWER
LOCAL
POWER
POWER
LINES
CONNECTIONS TO 300MC
TB1-8
PTT-NO
PTT-COM
SIG COM
MIC OUT
PTT
GND
MIC COM
MIC AUDIO IN
TB1-10
TB1-16
TB1-17
TB2-13
TB2-7
TB2-14
TB2-12
300MB
300VSC-1/300SCW-1
Driving a 25 V
RMS
Speaker Line
In this installation, the CommCenter is directly driving one or more speakers. The
total power consumed must not exceed the drive capability of the CommCenter. See
Figure 8.
Figure 8 Model 300MB with 25 V
RMS
connections
GROUND
290A7333
10
1
17
14 13
1
TB2
TB1
GAIN
CNTR
MODEL 300MB
SIGNAL LINES
SHIELDED
TWISTED PAIR
120/240 Vac
TB1-13
TB1-14
SIGNAL
-
SIGNAL
+
TO ADDITIONAL SPEAKERS,
40 OHMS MAXIMUM LOAD
