Honeywell Fire-Lite Alarms ACC-25/50 Instruction Manual page 82

Application Examples
Backup Amplifier switch S1 is set to the 'Backup ON' position. 18 AWG or larger jumpers con-
nect the Backup Amplifier TB2 Terminal 3 and Main Amplifier TB2 Terminal 1 as well as Backup
Amplifier TB2 Terminal 4 and Main Amplifier TB2 Terminal 2. Upon failure of the first or main
amplifier, the audio from the backup amplifier will be switched out to the speakers.
In this application, the system may also be manually activated via the keypad by selecting the
Building Speakers zone push-button followed by the selection of the Fire Message push-button, or
by using the microphone to make an announcement. Refer to the Keypad example in Figure 5.2
In the optional 70.7 V
transformer is not. For this reason, it is not necessary to install an FC-XRM70 transformer module
on the backup amplifier.
BUILDING
POWER ON
SPEAKERS
FIRE
MESSAGE
GENERATOR
GENERATOR
MICROPHONE
PLAYBACK
Keypad Example
ELR Resistor required for
Style Y - Class B only
4.75K, 1 watt P/N:75470
82
configuration, only the amplifier is backed-up; the FC-XRM70 coupling
RMS
Alarm Polarities Shown
FACP ELR Resistor
(for Style Y only)
4.7K ELR
SYSTEM
TROUBLE
MESSAGE
TROUBLE
TONE
TROUBLE
TROUBLE
RECORD
TROUBLE
SILENCE
Style Z
Supervisory
Polarity Shown
Speaker
First Amplifier
Mounted on Main Circuit Board
Figure 5.2 One 25 Watt Speaker Circuit With Backup
One Speaker Circuit With Backup on ACC-25/50
Host FACP
NAC
Style Z
Make no connections to CMD2
(S5 DIP switch 6 is OFF)
Alarm Polarities Shown
ACC-25/50 Series
Main Circuit Board
Backup
Audio In
Backup Speaker
Optional Backup Amplifier
Audio Command Center Series Manual — P/N 51889:E1 6/8/2010
Note: Typical illustration of a
Fire•Lite control panel. Refer to the
Command Input Specification in
Section 1.2, "Specifications" on
page 19, for the voltage range.
4.7K ELRs PN: 27072
Backup
Audio Out
Backup
Backup ON