ADPRO FastTrace by Xtralis Installation and User Manual
Doc 11168_12 33
Table 6: Audio Screw Terminal Connector
3.3.3 Audio Configuration
The audio output is normally connected to the input of an amplifier capable of driving a speaker.
With a suitable amplifier, multiple speakers may be driven to give a global announcement. The
output level is approximately equal to the input level provided at the receiver.
Figure 36: Audio Configuration with Amplifier
The audio input is normally connected to a microphone with a suitable pre-amplifier stage that is
capable of providing 1 V peak to peak audio.
Pin Function Signal Pin Specifications
Line Level Audio Output 1 Unbalanced, impedance 600 ohm
Nominal voltage level = 315 mVrms
Ground 2 0 V
Input 3 Unbalanced, impedance >6 K ohm
Nominal level = 10 mVrms to 400 mVrms
Ground 4
Local Speaker Speaker (+)
Speaker (-)
5
6
Balanced, impedance = 8 ohm
Nominal output power = 1 W
Total harmonic distortion < 5%
Ground 7
Local Microphone Microphone (+)
Microphone (-)
8
9
Differential impedance > 3 K ohm
Single ended impedance > 6 K ohm
Nominal signal level is
100 uV rms to 10 mV rms
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