Specifications

Bosch Security Systems | 2007-08 | 9922 141 50672en
Plena Loop Amplifier | Installation and User Instructions | Table of contents en | 7
Table of contents
Important safeguards ...................................................................................................................................................3
Acknowledgements.......................................................................................................................................................4
About this manual .........................................................................................................................................................5
Table of contents ...........................................................................................................................................................7
1. System overview ...........................................................................................................................................................9
1.1 Loop amplifier ...........................................................................................................................................................................9
1.2 Induction loop systems ..........................................................................................................................................................9
1.2.1 Introduction .........................................................................................................................................................................9
1.2.2 Principle ...............................................................................................................................................................................9
1.2.3 Benefits ............................................................................................................................................................................. 10
1.3 Plena ....................................................................................................................................................................................... 10
1.4 Block diagram ....................................................................................................................................................................... 10
1.5 Supervision ............................................................................................................................................................................ 10
1.6 Quadrature system ..............................................................................................................................................................10
1.7 Controls, connectors and indicators ...............................................................................................................................12
1.7.1 Front view ......................................................................................................................................................................... 12
1.7.2 Rear view ..........................................................................................................................................................................12
2. Design and planning ................................................................................................................................................. 13
2.1 Introduction ............................................................................................................................................................................ 13
2.2 System types ......................................................................................................................................................................... 13
2.2.1 Simple system ................................................................................................................................................................. 13
2.2.2 Quadrature systems ....................................................................................................................................................... 13
2.2.3 Expanded quadrature systems .................................................................................................................................... 15
2.2.4 Low-spill system .............................................................................................................................................................. 15
2.3 Induction loops ..................................................................................................................................................................... 16
2.3.1 Introduction ...................................................................................................................................................................... 16
2.3.2 Position ............................................................................................................................................................................. 16
2.3.3 Wire diameter .................................................................................................................................................................. 16
2.3.4 Magnetic field strength .................................................................................................................................................. 16
2.3.5 Connection ....................................................................................................................................................................... 16
2.3.6 Configuration ................................................................................................................................................................... 16
2.4 Potential problems ............................................................................................................................................................... 18
2.4.1 Metal loss ......................................................................................................................................................................... 18
2.4.2 Overspill ............................................................................................................................................................................ 18
2.4.3 Earth loops ....................................................................................................................................................................... 18
3. Installation ................................................................................................................................................................... 19
4. External connections ................................................................................................................................................ 21
4.1 Induction loops ..................................................................................................................................................................... 21
4.2 Audio inputs ..........................................................................................................................................................................21
4.3 Priority input ........................................................................................................................................................................... 22
4.4 Fault output ............................................................................................................................................................................ 23
4.5 Line output ............................................................................................................................................................................. 23
4.6 Power supply ......................................................................................................................................................................... 23
4.7 Slave to Master ..................................................................................................................................................................... 25
4.8 Slave to slave ........................................................................................................................................................................25
5. Configuration .............................................................................................................................................................. 27