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Installation and User Instructions

PLN-1LA10

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Plena Loop Amplifier

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Summary of Contents for PLN-1LA10

Page 1: ...Installation and User Instructions PLN 1LA10 en Plena Loop Amplifier ...

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Page 3: ...Installation and User Instructions Important safeguards en 3 Important safeguards Before you install or operate the Plena Loop Amplifier you must read the Important Safety Instructions The Important Safety Instructions are supplied together with the Plena Loop Amplifier ...

Page 4: ... Instructions Acknowledgements en 4 Acknowledgements Bosch Security Systems thanks the NVVS Dutch Association of Hard of Hearing People for the valuable information that was provided during the development of the Plena Loop Amplifier and the creation of the Installation and User Instructions ...

Page 5: ...and User Instructions uses precautions and notes The precaution gives the effect if you do not obey the instructions These are the types Note A note gives more data Caution If you do not obey the caution you can cause damage to the equipment Warning If you do not obey the warning you can cause personal injury or death Signs The Installation and User Instructions shows each precaution with a sign T...

Page 6: ...ty isolating transformer 2 Distribution supply box 3 Conductive compartment trays 4 Electro static voltage sensor 5 Cotton overall 6 Conductive floor mat 7 Conductive boots heel grounding protectors 8 Conductive stool 9 Strap resistance 0 5 to 1 0 MΩ 10 Common reference point 11 Conductive bench top 12 Supply ground 3 1 2 12 11 10 9 8 7 6 4 5 table 2 Conversion of units of length 1 in 25 4 mm 1 mm...

Page 7: ... 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...

Page 8: ...on loops 28 5 2 3 Bracket 28 5 3 Metal loss compensation 28 5 4 Supervision 29 5 5 Fault contact 29 5 6 Priority input 29 5 7 AGC Limiter 29 5 7 1 Introduction 29 5 7 2 Switch on and off 29 5 7 3 Range 30 5 8 Frequency range 30 5 9 Audio inputs 30 5 9 1 Sensitivity 30 5 9 2 Phantom power 30 5 9 3 Voice activation 31 6 Operation 33 6 1 Switch on 33 6 2 Switch off 33 6 3 Change volume 33 6 4 Change ...

Page 9: ... put their assistive listening devices in the T or MT mode to listen to the audio signals In the T or MT mode the internal microphone of the assistive listening devices is switched off and a little coil is activated T stands for tele coil The coil receives the alternating magnetic field and changes it into an alternating voltage which the assistive listening devices change into an audio signal Thi...

Page 10: ...ally any application The range includes mixer pre system and power amplifiers a source unit digital message manager feedback suppressor conventional and PC call stations an All in One system and a voice alarm system Each element is designed to complement all others thanks to matched acoustical electrical and mechanical specifications 1 4 Block diagram Refer to figure 1 4 for a block diagram of the...

Page 11: ...op Apparatus delivered Connected for 230V Out Com Line fuse 230V 3A 115V 6A 5K 10K 1 2 230V 115V NO C NC 1 0 dB 6 dB 20 dB Loop Integrity Power 2 Master 0 _ _ 0 0 AGC Limiter Fault Current 1 5 10 Master In VU LED PRE Amp POST Amp Master Slave Slave Out 0º 19 20 21 1 2 11 8 7 6 5 4 10 9 3 18 17 12 15 16 13 23 14 22 AGC 24 25 figure 1 4 Block diagram 1 Priority input 2 Mic Phantom Bal input Mic Line...

Page 12: ...and section 6 2 1 7 2 Rear view The rear of the loop amplifier refer to figure 1 3 contains 12 Metal loss compensation control Controls the metal loss compensation refer to section 5 3 13 Master slave sockets Connect master and slaves to the loop amplifier refer to section 4 7 14 Line output Connects an external recording device to the loop amplifier refer to section 4 5 15 Fault output Sends the ...

Page 13: ...nduction loops refer to figure 2 1 and figure 2 2 When you connect more than one induction loop to a master loop amplifier make sure that the induction loops are of the same size refer to figure 2 2 2 2 2 Quadrature systems 2 2 2 1 Introduction One of the key features of the Plena Loop Amplifier is that it can be used in quadrature systems In a quadrature system an even number of Plena Loop Amplif...

Page 14: ...loops refer to figure 2 4 for an example Such a system consists of A master loop amplifier M with multiple induction loops All master induction loops must have the same size A slave loop amplifier S with multiple induction loops All slave induction loops must have the same size Note Although it is not required the sizes of the master and slave induction loops are typically the same figure 2 3 Simp...

Page 15: ...6 for an example A low spill system makes sure that the magnetic field strength drops even more rapid to zero beyond the borders of the covered area Such a system consists of A master loop amplifier M with one or more induction loops All master induction loops must have the same size An odd number of slave amplifiers S1 in this example with one or more induction loops All slave induction loops mus...

Page 16: ...next to the curves show the distance from the floor to the induction loop in of the width W of the room 2 3 3 Wire diameter For the best audio quality the DC direct current resistance of the induction loop must be between 1 and 3 Ω The DC resistance depends on the wire diameter and the wire length Do as follows 1 Calculate the wire length The wire length depends on the size of the induction loop 2...

Page 17: ...idth of the room power dB width 0 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 1 2 3 10 20 30 40 50 60 70 80 90 100 100 90 80 70 60 40 30 20 50 10 figure 2 9 Wire diameter vs the wire length copper wires 0 00 0 25 0 50 0 75 AWG 20 1 00 1 25 1 50 1 75 2 00 2 25 2 50 2 75 3 00 0 25 30 50 76 90100 135 150 200 250 300 350 wire length m wire diameter mm 303 34 ...

Page 18: ...er refer to section 5 3 2 4 2 Overspill The larger the induction loops the more overspill When there is overspill people outside the room with the induction loop system can overhear the audio signal on the induction loop Overspill can also cause interference on other induction loop systems in the same building When you design a quadrature system refer to section 2 2 2 and section 2 2 3 or a low sp...

Page 19: ... within the safe range Note Always compare the contents of a shipment with the descriptions on the shipment documents table 3 1 Box Description Quantity Loop amplifier 1 x Important Safety Instructions 1 x Installation User Instructions 1 x Power cable 1 x 19 rack system brackets 2 x Cover bracket 1 x XLR cable 1 x Caution Do not unpack the box until you install and connect the loop amplifier figu...

Page 20: ...Bosch Security Systems 2005 05 9922 141 50672en Plena Loop Amplifier Installation and User Instructions Installation en 20 Intentionally left blank ...

Page 21: ...V Out Com 5K 10K 1 2 230V 115V NO C NC On Off Priority input Master In Master in Slave Out 0º 90º Supervis ion Line fuse 230V 3A 115V 6A 1 2 Loop Out Com Line fuse 230V 3A 115V 6A figure 4 2 Audio inputs connection table 4 2 Audio inputs details Number of connections 2x XLR sockets Location Rear side Sensitivity Switchable 1 mV 1 V Impedance 1 kΩ Dynamic range 100 dB Signal to noise ratio 63 dB ma...

Page 22: ...therland s N663 Phantom power Z1 Z2 Z3 Z4 Z5 Z6 Ext Booster In DC In 100V 0 TRG 1 Int Booster Out 24V EMG Fault Call External Booster Out CD Tun er SEL1 SEL0 Firmwar e Upgrade Monitor APR mode Supervis ion 2ch operatio n LBB199 4 Off On USB Vox Speech filter Mic Line Vox LBB199 4 Rated input power 7 60VA Line fuse T6 3L25 0V for230V AC T10L25 0V for115V AC 115V 230V Apparat us delivere d Connec te...

Page 23: ...o 63 dB max volume 75 dB min volume mute Headroom 25 dB PLN 1LA10 Loop Amplifier NC COM NO AGC Metal loss compensation Master In VU LED Limiter PRE Amp POST Amp Master Slave 100V 0 Vox Mix On Off Phantom Phantom Mic Line On Off On Off Mic Line Priority input Slave Out 0º 90º Line Out Fault Supervision Loop Apparatus delivered Connected for 230V Out Com Line fuse 230V 3A 115V 6A 5K 10K 1 2 230V 115...

Page 24: ...7 Power supply connection table 4 8 Power supply details Mains voltage 230 115 V AC 10 50 60 Hz Power consumption max 400 W Mains inrush current max 7 A 230 V AC max 14 A 115 V AC Signal to noise ratio 63 dB max volume 75 dB min volume mute Headroom 25 dB Loop Apparatus delivered Connected for 230V Out Com 230V 115V Line fuse 230V 3A 115V 6A Slave out AGC Metal loss compens ation Limiter 100V 0 Vo...

Page 25: ...om 5K 10K 1 2 230V 115V NO C NC On Off Priority input 90º Superv ision Line fuse 230V 3A 115V 6A 1 2 AGC Metal loss compens ation Limiter 100V 0 Vox Mix On Off Phantom Phantom Mic Line On Off Mic Line Line Out Fault Loop Appara tus delivere d Connec ted for 230V Out Com 5K 10K 1 2 230V 115V NO C NC On Off Priority input 90º Superv ision Line fuse 230V 3A 115V 6A 1 2 AGC Metal loss compens ation Li...

Page 26: ...Bosch Security Systems 2005 05 9922 141 50672en Plena Loop Amplifier Installation and User Instructions External Connections en 26 Intentionally left blank ...

Page 27: ...on the master loop amplifier with the power switch on the front 7 Increase the volume of audio input 2 of the master loop amplifier with its input volume control until the Limiter LED on the front of the master loop amplifier comes on 8 Increase the electric current through the master induction loops with the Master volume control on the front of the master loop amplifier until the magnetic field ...

Page 28: ... 18 Switch off the slave loop amplifier with the power switch on the front of the slave loop amplifier 19 Repeat the procedure for the other slave loop amplifier in the induction loop system 5 2 3 Bracket You can cover the front of the loop amplifier with a bracket refer to figure 5 2 When you cover the front you make sure that nobody can change the position of the volume controls Thus you make su...

Page 29: ...priority input sends to the connected induction loops with the Priority input volume control The Priority input volume control is on the rear of the loop amplifier refer to figure 5 4 5 7 AGC Limiter 5 7 1 Introduction Automatic gain control AGC keeps the level of the audio signal on the connected induction loops constant The limiter makes sure that audio signals with a strength of more than 0 dBV...

Page 30: ...sition for the most optimal result 5 9 Audio inputs 5 9 1 Sensitivity You can set the sensitivity of the audio inputs with the Mic Line switch The Mic Line switch is on the rear of the loop amplifier refer to figure 5 8 If the connected audio source is a microphone set the switch in the Mic position If the connected audio source is a line level source set the switch in the Line position 5 9 2 Phan...

Page 31: ...ix switch The Vox Mix switch is on the rear of the loop amplifier refer to figure 5 10 To switch Vox on set the Vox Mix switch in the Vox position The audio signal of audio input 1 overrides the audio signal of audio input 2 To switch Vox off set the Vox Mix switch in the Mix position The audio signal of audio input 1 and the audio signal of audio input 2 are mixed figure 5 10 Vox Mix switch Vox M...

Page 32: ...Bosch Security Systems 2005 05 9922 141 50672en Plena Loop Amplifier Installation and User Instructions Configuration en 32 Intentionally left blank ...

Page 33: ...er refer to figure 6 2 goes off 6 3 Change volume You can change the volume of the audio signal on the connected induction loops with the input volume controls The input volume controls are on the front of the loop amplifier refer to figure 6 3 figure 6 1 Power switch figure 6 2 Power LED 1 0 dB 6 dB 20 dB Power 2 0 0 1 0 dB 6 dB 20 dB Power 2 0 0 Caution Do not change the volume of the audio sign...

Page 34: ...ency content of the audio signal 6 5 Condition LEDs figure 6 4 Tone controls Master _ _ 0 table 6 1 Status indicators Indicator Description Recommended action Additional information Fault The loop amplifier does not operate correctly Contact your dealer when the LED goes off Refer to section 5 5 Loop integrity The induction loops are not intact Contact your dealer when the LED goes off AGC The aut...

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Page 36: ...For more information visit www boschsecuritysystems com Bosch Security Systems B V Data subject to change without notice 2005 05 9922 141 50672en ...

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