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Wiring of the power amplifier interface:
PIN
Signal
1
Self-testing control signal
2
Power-saving control signal
VCC (24 V DC), from device output to power
3
amplifier
4
Differential audio signal positive
5
Differential audio signal negative
6
Ground
Power amplifier fault signal
7
8
Reserved
Audio Output
The device has three additional audio outputs, corresponding to audio channel 1, audio channel 2
and record output, which can be connected to a third-party system or an external power amplifier via
RCA terminal. When a live announcement is active via the PTT microphone, the REC interface will
output the audio signal of microphone. This is only available when the PTT microphone is active.
Amplifier Interface
The Amplifier Interface is used to input or output the 100 V audio signal from power amplifier:
CH1A outputs the 100 V audio signal of the internal amplifier, which corresponds to audio
channel 1 and loudspeaker line from line 1 to line 4.
CH1B can be connected with the 100 V audio signal from an external power amplifier, which
corresponds to audio channel 1 and enables loudspeaker lines 5 to 8.
CH2A can be connected with the 100 V audio signal from an external power amplifier, which
corresponds to audio channel 2 and loudspeaker lines 1 to 4.
When power amplifier works normally,
the output voltage is 24 V DC.
When power amplifier is in fault, under
the protection or self-testing condition,
the output voltage is 0 V.
Legend
21
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