Document #50580 Rev. C 8/12/97 P/N 50580:C
41
Two Speaker Circuits - Two 30 Sec. Messages (Fire and Nonfire)
5.4
Two Speaker Circuits - Two 30 Sec. Messages (Fire and Nonfire)
This application consists of one FIRE•COMMAND•25/50 with two speaker circuits which requires installation of the
optional second amplifier. This configuration is suitable for small facilities requiring no more than 50 watts of total
output power (provided on dual 25 watt speaker circuits). A fire evacuation message will be generated over both
speaker circuits during an alarm condition from the host FACP and an emergency ‘nonfire’ message can be manually
generated over both circuits.
In this application, one NAC from the host FACP is connected to the CMD1 In terminals. The CMD1 Out terminals
are then terminated with an EOL resistor for the FACP's Style Y NAC or the terminals are wired back to the host
FACP for a Style Z NAC. CMD2 is connected to a normally open contact which can be used to manually generate an
emergency ‘nonfire’ message (i.e. tornado warning).
S5 DIP switch 2 is set to ON which causes transmission of the primary ‘fire’ message over speaker circuits 1 and 2
upon activation of CMD1 and transmission of the secondary ‘nonfire’ message over speaker circuits 1 and 2 upon
activation of CMD2. S5 DIP switch 5 is set to OFF which causes CMD1 input to be activated by a reverse polarity
condition and S5 DIP switch 6 is set to ON which causes CMD2 input to be activated by a contact closure.
FIGURE 5-4:
Two Speaker Circuits - Two Messages
Style Z
4.7K, ¼ watt EOL
P/N: 27072
FACP EOL Resistor (Style Y only)
FIRE•COMMAND•25/50 Main
Circuit Board
Style Z
Style Z
Model R-20K,
½ watt EOL
P/N: 75477
(Style Y only)
Model R-20K,
½ watt EOL
P/N: 75477
(Style Y only)
Supervisory
Polarity Shown
Supervisory
Polarity Shown
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