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Audio Command Center Series Manual — P/N 51889:E1 6/8/2010 37
S5 DIP Switch Settings on ACC-25/50 Series Motherboard (ACC-MCB) Field Programming
2.2 S5 DIP Switch Settings on ACC-25/50 Series Motherboard
(ACC-MCB)
• Switch 1 - not used
• Switch 2 - not used
• Switch 3 - controls whether background music can be played over the speakers from the RCA
Jack Input.
OFF = Background music disabled (factory default setting)
ON = Background music enabled
• Switch 4 - not used
• Switch 5 - used to determine what will activate the Command Input #1.
OFF = Activation on NAC polarity reversal (factory default setting)
ON = Activation on contact closure
• Switch 6 - used to determine what will activate the Command Input #2.
OFF = Activation on NAC polarity reversal (factory default setting)
ON = Activation on contact closure
• Switch 7 - used to determine the source being used to record the digital voice message.
OFF = Record from Microphone (factory default setting)
ON = Record from External Audio Input (RCA Jack or mini PC Jack)
• Switch 8 - used to enable recording of digital voice message.
OFF = Recording not permitted, Record/Playback key used for message playback (factory
default) setting)
ON = Recording permitted, Record/Playback key used to record voice message. Switch
must be restored to default setting upon completion of recording.
2.3 S3 DIP Switch Settings on ACC-25/50 Motherboard (ACC-
MCB)
• Switches 1, 2 and 3 - used to choose the Message Control Selections which determine how the
CMD inputs will direct the tones/messages to the ACC-AAM25 audio amplifier circuits. The
selections also determine the length of each available message.
NOTES:
1. NFPA 72 requires that speakers used as alarm notification appliances on fire alarm systems not
be used for nonemergency purposes. Consult with the Local AHJ for authorization to use
background music with the AUDIO•COMMAND•CENTER•25/50. Only 20 watts of power can be
supplied per amplifier if background music is enabled.
2. The AUDIO•COMMAND•CENTER•25/50ZS and AUDIO•COMMAND•CENTER•25/50ZST do not
support background music.
3. Background music is prohibited during AC loss conditions to preserve battery power.
Switch
1
Switch
2
Switch
3
Mode
Maximum
Length of
Each
Message
Audio Signal Control
CMD1
1
CMD2 CMD3 CMD4 CMD5
OFF OFF OFF Dual
2
Zone
60 sec. Message 1 to
AAM1
3
Message 1 to
AAM2
not used not used not used
ON OFF OFF Single
4
Zone
30 sec. Message 1 to
AAM1 & 2
Message 2 to
AAM1 & 2
not used not used not used
Table 2.7 Switch Settings for Message Control