GB9221 series instruction manual
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by the alarm controller or provided by the output module.
3）Output line connection：
a) Line output
This interface is used to extend power amplifier or transfer audio
signal to other audio equipment. When the machine cannot meet the needs of field
application, power amplifier can be extended through this interface. The
connection line with the power amplifier should adopt high-quality shielded wire.
b) Fixed voltage output Fixed voltage output is power amplifier output, which
can be directly connected with fixed voltage speaker or broadcast circuit through
GB9231/GB9232 broadcast divider. RVS double twisted copper core wire above
1mm² should be used for fixed voltage output line. The line diameter should be
increased when long distance.
6 Installation and Debug
1）Correct connection shall be made according to the wiring instructions before
debugging.
2）The power LED(green) is on when power on.
3）Please do not connect any external circuit to the power amplifier before
troubleshooting. Please test if there’s short between the circuit and the chassis
using a multimeter or other test equipment to check the insulation resistance.It
is easy to damage machine when the power is turned on under short conditions.
4）When the circuit debug finished, preset volume should be set after the fire
alarm is triggered. After the preset volume is set, the machine can be used normally.
7 Instructions for use
1）Make sure the line connection is correct before use.
2）Output volume adjustment: The output volume can be changed by turning the front
panel “Volume Adjustment” knob.There are corresponding instructions. Note: It is
not allowed to change the volume in the emergency broadcast state.
3）Preset emergency broadcast volume: The emergency broadcast volume refers to
the volume under the emergency broadcast state. This volume should be manually preset
before use. It is effective after the fire alarm is triggered and cannot be manually
adjusted. The way to preset is as follows：
In non-emergency state, adjust the volume to the appropriate position, press on
the [volume adjustment]knob for more than 2 seconds,the alarm buzzer will keep ringing.
Then release the knob.
4）Fault alarm, noise elimination and reset：
◆ Overtemperature: when the internal transistor temperature exceeds the set
temperature limit (90℃), over temperature fault occurs. The indicator LED (yellow)
is always on.Cut off the power supply of the main circuit and send an alarm buzzer.When
the temperature is lower than the set value,system will automatically cancel the alarm
and restore.
