Download ASL INTERCOM VAR12 Installation guide

VAR4 / VAR12 / VAR20 - Product Description
Contents
1
Introduction .............................................................................................................................................. 7
2
System Overview ..................................................................................................................................... 8
2.1
System Context ........................................................................................................................ 10
2.2
Communication with the ASL Amplifier System ....................................................................... 12
3
Audio Router Functions ........................................................................................................................ 13
3.1
Architecture............................................................................................................................... 13
3.1.1
Audio Routing ................................................................................................................... 13
3.2
Audio Inputs.............................................................................................................................. 15
3.2.1
Mic/Line Inputs.................................................................................................................. 16
3.2.1.1 Paging Microphone Mode ......................................................................................... 17
3.2.1.2 Zoneable Fire Microphone Mode .............................................................................. 17
3.2.1.3 Fire Microphone (ALL-CALL) Mode .......................................................................... 18
3.2.1.4 Single Button Microphone Mode............................................................................... 18
3.2.1.5 Miscellaneous Input Mode ........................................................................................ 18
3.2.1.6 Network Channel Mode............................................................................................. 19
3.2.1.7 Unused Mode............................................................................................................ 19
3.2.1.8 ‘Listen-in’ Function on Station Master Console......................................................... 19
3.2.2
Digital Voice Announcers.................................................................................................. 20
3.2.3
Background Music ............................................................................................................ 20
3.2.4
Mute Input ......................................................................................................................... 20
3.3
Audio Outputs ........................................................................................................................... 21
3.4
Audio Input Priority and Override ............................................................................................. 23
3.5
Fades and Chimes ................................................................................................................... 24
3.5.1
Fades ................................................................................................................................ 24
3.5.2
Chimes.............................................................................................................................. 24
3.5.3
Sequence of Events.......................................................................................................... 24
3.6
Surveillance Tone Detection and Generation........................................................................... 26
3.6.1
Detection........................................................................................................................... 26
3.6.2
Generation ........................................................................................................................ 26
3.7
Control Ports............................................................................................................................. 26
3.7.1
Analogue Interface............................................................................................................ 27
3.7.1.1 Non-monitored Contact Closure to Ground .............................................................. 27
3.7.1.2 Monitored .................................................................................................................. 28
3.7.2
Opto-Isolated Interface ..................................................................................................... 28
3.7.2.1 Contact Closure to Ground ....................................................................................... 28
3.7.2.2 Contact Closure to Supply (+VE going Input) ........................................................... 28
3.7.2.3 Positive Voltage Source (+VE going Input)............................................................... 29
3.7.2.4 Fire Alarm Sounder Interface .................................................................................... 29
3.7.3
Contact Functions ............................................................................................................. 30
3.7.3.1 Routing ...................................................................................................................... 30
3.7.3.1.1 Latching Mode ................................................................................................... 30
3.7.3.1.2 Non-Latching Mode ........................................................................................... 31
3.7.3.2 External Faults .......................................................................................................... 31
3.7.3.3 Remote Fault Accept................................................................................................. 31
3.7.3.4 Music A/B Switching.................................................................................................. 32
3.7.4
Remote Fault Indication.................................................................................................... 32
3.8
Permanent Routes.................................................................................................................... 33
3.9
Remote I/O Units ...................................................................................................................... 34
3.9.1
Analogue Inputs ................................................................................................................ 35
3.9.1.1 Programme Selector Operation ................................................................................ 35
3.9.1.2 Volume Control Operation......................................................................................... 36
3.9.1.3 Ambient Noise Sensor (ANS).................................................................................... 36
3.9.2
Digital Inputs ..................................................................................................................... 38
3.9.3
Digital Outputs .................................................................................................................. 38
3.10
Night Time Volume Control ...................................................................................................... 38
3.11
Test Tone Generation............................................................................................................... 38
Issue: 03 complete, approved
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