Installation Instructions

PX/QX/RX Version 4.30 Installation Manual – Issue C
- 38 -
Audio System
Connecting an External Microphone
Up to 3 external microphones can be connected to each audio module. The sensitivity of each
external microphones can be increased by fitting the appropriate link (MIC1, MIC2 or MIC3) on the
audio module PCB.
- IP3 + SW
- IP2 + SW
- IP1 + SW
MIC1
MIC2MIC3
Speaker
- +
Speaker
volume
- Out + Tamper
SW
R, -
Ext. microphone
PCB
Audio System
Connecting the Audio Bus Interface
The Audio Bus Interface (ABI) can be fitted, along with an Audio Module, to provide audio capability to
the system.
For systems requiring the ability to record and playback messages, a speech module is fitted in place
of an ABI.
Either board should be fitted with the power removed from the Control Panel. Power should only be
restored after the alignment of the two boards has been checked.