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fire alarm input
The 2 pin orange Phoenix connector labelled Fire Alarm, was designed to provide an
emergency mute of the TeachLogic amplifier. When interfaced to the fire alarm panel
relay contact output, all audio devices (microphones, dvd, etc.) will turn SILENT. In the
event of a fire, this will help to lower the overall decibel levels and help students and
staff hear the audible fire alarm tones/instruction within the classroom. This feature
only requires a contact closure from the Fire Alarm Panel.
Connecting the system:
1.
Unplug the 2 pin green Phoenix connector
2.
Connect the speaker cable from the paging system to the 2 pin Phoenix connector
of the Page input
3.
Reconnect the 2 pin green Phoenix connector
4.
Determine the signal level of the paging system (25v, 70v, or 100v)
5.
Set the slide switch to the appropriate speaker level setting
6.
With the TeachLogic amplifier turned ON, send a page signal through the page
input
7.
Adjust the sensitivity control to ensure the Maxim III senses the page signal noting
that some pages with quiet voices will require greater sensitivity settings. The
system will maintain its mute until about 11 seconds after the page signal falls
below the threshold for sensing. Thereupon, the wireless mics are unmuted and
other audio levels are ramped up gradually to their prior volume (before mute).
8.
In the event of a loss of AC power, the TeachLogic amplifier will continue to pass
the page on to 2 of the speaker connections as outlined on the following diagram.
Only the upper left and lower right speaker outputs will pass page without power.
Switch Setting:
0.1W DRAW
1W DRAW
MUTE OFF
Impedance
5000Ω
620Ω
Open circuit
Power Draw at 25V
0.1W
1.0W
0W
Power Draw at 70V
1.0W
7.9W
0W
New Models:
Older Models:
Switch Setting:
100V
70V
25V
Impedance
5000Ω
620Ω
115Ω
Power Draw at 25V
0.1W
1.0W
5.3W
Power Draw at 70V
1.0W
7.9W
42W
