Two Speaker Circuits - One 60 Second Message On Both Amps
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Document #50580 Rev.C 8/12/97 P/N 50580:C
5.3
Two Speaker Circuits - One 60 Second Message On Both Amps
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 output
power. A 60 second fire evacuation message will be generated over both speaker circuits simultaneously during an
alarm condition from the host FACP or when the Manual Evacuate switch is activated.
In this application, the one NAC from the host FACP is connected to CMD1 In terminals. The CMD1 Out terminals
are then jumpered to the CMD2 In terminals. The CMD2 Out terminals may then be terminated with an EOL resistor
for the FACP's Style Y NAC or the terminals may be wired back to the host FACP for a Style Z NAC. Note that addi-
tional NAC devices may be connected to the CMD2 Out terminals as illustrated in Figure 5-3.
S5 DIP switch 2 is set to OFF which causes transmission of the primary ‘fire’ message over speaker circuits 1 and 2
upon activation of CMD1 and 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 OFF which also causes CMD2 input to be activated by a
reverse polarity condition.
FIGURE 5-3:
Two Speaker Circuits - One 60 Second Message On Both Amps
Style Z
FACP EOL Resistor (Style Y only)
FIRE•COMMAND•25/50 Main
Circuit Board
Style Z
Style Z
Supervisory
Polarity Shown
Supervisory
Polarity Shown
Model R-20K,
½ watt EOL
P/N: 75477
(Style Y only)
Model R-20K,
½ watt EOL
P/N: 75477
(Style Y only)
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