16
16
Model 300MB-SD CommCenter Series D1
Federal Signal
www.fedsig.com
Typical Installations of the 300MB
Typical Installations of the 300MB
This section describes four typical installations of the 300MB system.
As a SelecTone Control Center
In this installation, shown in Figure 6, the CommCenter is acting as a SelecTone
®
control center driving a 25 V
RMS
signal line. Remote speaker/amplifiers have the signal
coupled in through an AM25CK.
Figure 6 CommCenter as a SelecTone control center
GROUND
290A7321
10
1
1716 15
1
TB2
TB1
GAIN
CNTR
MODEL 300GC
MODEL 300MB
MODEL AM25CK
SIGNAL LINES SHIELDED
TWISTED PAIR
120/240 Vac
120 Vac
120 Vac
LOCAL PWR.
LOCAL PWR.
POWER LINES
1413
As a Remote Microphone and Message Playback
This installation uses a 300MB interface with a 300VSC-1 or 300SCW-1. The
CommCenter acts as a remote microphone audio input and adds message playback
capability to a SelecTone system. Adjust the gain on the 300MB so that the audio output
is at the required audio input level for the remote microphone input (16 mV
RMS
max.)
on the 300VSC-1 and the 300SCW-1. Failure to adjust the gain causes distortion and
clipping in the system. See Figure 7.
