15
Installation and Maintenance Manual
Federal Signal
www.fedsig.com
Connecting to Remote Devices
Figure 5 Cascading multiple units
GROUND
PRIMARY
SECONDARY
SIGNAL
ENABLE
CASCADE
OUT
120/240 Vac
GROUND
290A7317
10
2 1
171615 14
1
10
16
12 11
1
1
TB2
TB1
TB2
GAIN
CNTR
GAIN
CNTR
TB1
120 Vac
120 Vac
120 Vac
LOCAL PWR.
LOCAL PWR.
POWER LINES
MODEL
300GC
MODEL 300MB
MODEL 300MB
MODEL
AM25CK
SIGNAL LINES SHIELDED
TWISTED PAIR
SIGNAL
ENABLE
CASCADE IN
120/240 Vac
13
Connecting a Low-Level Audio Output
The 300MB also has a 1 V
P-P
audio output that is designed to drive the cascaded input
of a secondary 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.
