Connecting A Low-Level Audio Output; Typical Installations Of The 300Mb; As A Selectone Control Center; Figure 5 Cascading Multiple Units - Federal Signal Corporation D1 Series Installation And Maintenance Manual

GROUND
CASCADE IN
10 2 1
TB2
10

Connecting a Low-Level Audio Output

The 300MB also has a 1 Vpp audio output that is designed to drive the cascaded input of a slave
CommCenter. This low-level output is available across terminals TB1-16 and TB1-17. It can also be
connected to an analog fiber optic transmitter so that audio can be transmitted over a fiber-optic link in
an electrically noisy environment.

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 Vrms signal line. Remote speaker/amplifiers have the signal coupled in through an AM25CK.
GROUND
120/240 Vac
10
TB2
SIGNAL LINES SHIELDED
TWISTED PAIR

Figure 5 Cascading multiple units

120/240 Vac
GAIN
1716 1 5 1 4 1 3 1
CNTR
TB1
SIGNAL LINES SHIELDED
GROUND
120/240 Vac
GAIN
1 16 12 11
CNTR
TB2

Figure 6 CommCenter as a SelecTone control center

MODEL 300MB
GAIN
1 17 16 15 1413
CNTR
TB1
Model 300MB-SD CommCenter Series D1
MODEL 300MB
MODEL
300GC
MASTER
MODEL
AM25CK
TWISTED PAIR
MODEL 300MB
SLAVE
1
TB1
MODEL 300GC
MODEL AM25CK
1
Installation and Maintenance Manual
POWER LINES
120 Vac 120 Vac
LOCAL PWR. LOCAL PWR.
POWER LINES
120 Vac
LOCAL PWR. LOCAL PWR.
120 Vac
290A7317
120 Vac
290A7321
13