Brochure - Morrisons Public Address
Contents
1. width 2 50 2 25 2 00 wire diameter mm 0 135 150 200 350 wire length m figure 2 9 Wire diameter vs the wire length copper wires Bosch Security Systems 2005 05 9922 141 50672en Plena Loop Amplifier Installation and User Instructions Design and planning en 18 2 4 Potential problems 2 41 Metal loss New buildings often contain a large amount of metal for example meshes in concrete floors and ceilings The metal will have an effect on the high frequencies of the signal You can adjust the tone of the audio signal on the induction loops with the Metal loss compensation control on the rear of the loop amplifier refer to section 5 3 The metal loss compensation is a variable signal dependent addition of high frequencies 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 spill system refer to section 2 2 4 you can avoid large induction loops and thus avoid the potential problem of overspill 2 4 3 Earth loops Earth loops can cause interference on2. 90 o figure 1 4 Block diagram Bosch Security Systems 2005 05 9922 141 50672en Plena Loop Amplifier Installation and User Instructions System overview 1 7 Controls connectors and indicators 1 7 1 Front view The front of the loop amplifier refer to figure 1 3 contains 1 Power LED VU Meter A combined power LED and VU meter The green power LED comes on when the loop amplifier is switched on The VU meter shows the master VU level 0 dB red 6 dB 20 dB yellow 2 Electric current meter Show the electric current through the induction loop 3 Fault LED Comes on when a supervised function of the loop amplifier fails refer to section 6 5 4 Headphones socket Connects headphones to the loop amplifier 5 Limiter LED Comes on when the limiter is active refer to section 6 5 6 AGCLED Comes on when the automatic gain control AGC is active refer to section 6 5 7 Loop integrity LED Comes on when the induction loop is intact refer to section 6 5 8 Master volume control Sets the maximum electric current that flows through the induction loop refer to section 5 2 9 Tone controls Controls the high and low tones of the audio signal on the induction loop refer to section 6 4 10 Input volume controls Control the volume of audio input 1 and audio input 2 refer to section 6 3 11 On off switch Switches the loop amplifier on and off refer to section 6 1 a
3. Mix Line switch 5 9 2 Phantom power You can switch phantom power for microphones on and off with the Phantom power switch The Phantom power switch is on the rear of the loop amplifier refer to figure 5 9 Ifthe connected audio source is a microphone that must receive phantom power set the Phantom switch in the ON position Ifthe connected audio source is not a microphone or if the connected microphone does not accept phantom power set the Phantom switch in the OFF position Phantom On Off figure 5 9 Phantom switch Bosch Security Systems 2005 05 9922 141 50672en Plena Loop Amplifier Installation and User Instructions Configuration en 31 5 9 3 Voice activation You can switch voice activation Vox of audio input 1 on and off with the Vox Mix 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 Vox Mix figure 5 10 Vox Mix switch Bosch Security Systems 2005 05 9922 141 50672en Plena Loop Amplifier Installation and User Instructions Configuration en 32 Intentionally left blank B
4. important number of potential problems and solutions will be discussed later 2 3 2 Position For the best audio quality and the smallest variation in the magnetic field strength the distance between the induction loop and the listening plane must be between 12 and 15 of the width of the room refer to figure 2 7 12 15 W 12 1590 W figure 2 7 Position For example in a room with a width W of 10 m the induction loop should be installed 0 to 0 4 m below or 2 4 to 2 8 m above the floor for the best audio quality and the smallest variation in the magnetic field strength Typically you will install the induction loop in the floor or in the ceiling of a room When the distance between the floor and the induction loop is too small less than 8 of the width or too large more than 20 of the width refer to figure 2 8 The figure 2 8 shows the extra power that the loop amplifier needs to make the correct magnetic field The numbers next to the curves show the distance from the floor to the induction loop in of the width W of the room en 16 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 Q 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 Use figure 2 9 to get the allowed wire diam
5. the induction loop system You can avoid earth loops when you connect the shielding of cables only to one device Bosch Security Systems 2005 05 9922 141 50672en Plena Loop Amplifier Installation and User Instructions Installation 3 Installation The loop amplifier is sent to you in a box Refer to table 3 1 for the contents of the box Note Always compare the contents of a shipment with the descriptions on the shipment documents table 3 1 Box Description Quantity Loop amplifier 1x Important Safety Instructions 1x Installation amp User Instructions 1x Power cable 15 19 rack system brackets 2x Cover bracket 1x XLR cable 1x Caution Do not unpack the box until you install and connect the loop amplifier Install the loop amplifier in a 19 inch rack system or on a flat surface refer to figure 3 1 figure 3 1 Installation en 19 Make sure that there is a free space of at least 100 mm on both sides of the loop amplifier for ventilation The loop amplifier has a regulated internal fan which keeps the temperature of the electronics within the safe range table 3 2 Physical characteristics Dimensions h x w x d 94 x 430 x 320 mm 19 wide 2U high Weight 11 6 kg table 3 3 Environmental conditions Operating temperature 5 to 45 C Storage temperature 25 to 55 C Relative humidity lt 95
6. the loop amplifier refer to section 5 6 Bosch Security Systems 2005 05 9922 141 50672en Plena Loop Amplifier Installation and User Instructions Operation en 34 6 4 Change tone You can change the tone of the audio signal on the connected induction loops with the tone controls The tone controls are on the front of the loop amplifier refer to figure 6 4 The left tone control changes the bass or low frequency content of the audio signal The right tone control changes the treble or high frequency content of the audio signal figure 6 4 Tone controls 6 5 Condition LEDs table 6 1 Status indicators Indicator Description Recommended action Additional information Fault The loop amplifier does Contact your dealer when Refer to section 5 5 not operate correctly the LED goes off Loop integrity The induction loops are Contact your dealer when not intact the LED goes off AGC The automatic gain Refer to section 5 7 control is on Limiter The signal of one or more Check which input is too Refer to section 5 7 of the inputs is clipped off loud and turn its volume because it is too strong control counterclockwise to decrease the volume Bosch Security Systems 2005 05 9922 141 50672en O Bosch Security Systems B V Data subject to change without notice 2005 05 9922 141 50672en BOSCH
7. 672en Plena Loop Amplifier Installation and User Instructions Configuration 5 7 3 Range You can set the AGC range with the AGC volume control The AGC volume control is on the rear of the loop amplifier refer to figure 5 6 AGC mum figure 5 6 AGC volume control The correct AGC range depends on the audio input signals and the perceptions of the users of the connected induction loops If you set the AGC range too wide soft sounds for example undesired ambient noise is amplified If you set the AGC range too narrow desired soft sounds are lost 5 8 Frequency range You can set the frequency range with the 5K 10K switch The 5K 10K switch is on the rear of the loop amplifier refer to figure 5 7 Ifthe audio inputs contain speech set the switch in the 5K position for the most optimal result Ifthe audio inputs contain background music set the switch is in the 10K position for the most optimal result 5K 10K figure 5 7 Frequency range switch en 30 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 Ifthe connected audio source is a microphone set the switch in the Mic position Ifthe connected audio source is a line level source set the switch in the Line position Mic Line figure 5 8
8. Bosch Security Systems 2005 05 9922 141 50672en Plena Loop Amplifier Installation and User Instructions Installation en 20 Intentionally left blank Bosch Security Systems 2005 05 9922 141 50672en Plena Loop Amplifier Installation and User Instructions External Connections en 21 4 External connections 4 2 Audio inputs You can connect audio sources to the audio inputs of the loop amplifier For example you can connect a 44 Induction loops power amplifier and a microphone refer to figure 4 2 Connect the induction loops to the rear of the loop amplifier refer to figure 4 1 Always twist wires that run PLN 1LA10 parallel and close to each other to avoid additional and Loop Amplifier undesired inductions PLN 1P120 figure 4 1 Induction loop connection Power Amplifier table 4 1 Induction loop details Number of connections 1x screw terminal Location figure 4 2 Audio inputs connection Rear side Current table 4 2 Audio inputs details max 10 A peak max 6 A continuous Number of connections Induction loop DC resistance 2x XLR sockets 05to30 Location Induction loop area Rear side max 600m 100 mArys m Sensitivity Switchable 1 mV 1 V Impedance gt 1kQ Dynamic range 100 dB Signal to noise ratio 63 dB max volume 75 dB min volume mute Headroom 25 dB Phantom power Switchable 16 V VOX functionali
9. Design and planning en 14 2 22 2 Simple quadrature system To cover larger areas create a basic system with A simple quadrature system consists of refer to figure multiple induction loops refer to figure 2 4 for an 2 3 example Such a system consists of A master loop amplifier M with one induction loop A master loop amplifier M with multiple induction A slave loop amplifier S with one induction loop loops All master induction loops must have the same size A A slave loop amplifier S with multiple induction Note loops All slave induction loops must have the same Although it is not required the sizes of the size master and slave induction loops are typically the same Note Although it is not required the sizes of the master and slave induction loops are typically the same M i M o Brad S figure 2 3 Simple system single loops figure 2 4 Simple system multiple loops Bosch Security Systems 2005 05 9922 141 50672en Plena Loop Amplifier Installation and User Instructions Design and planning en 15 2 2 3 Expanded quadrature systems 2 2 4 Low spill system To cover very large areas create an expanded A special type of quadrature system is the low spill quadrature system refer to figure 2 5 for an example system refer to figure 2 6 for an example A low spill Such a system consists of system makes sure that the ma
10. Loop Amplifier Installation and User Instructions External Connections en 24 2 Make sure that the fuse holder in the rear of the loop amplifier contains the correct fuse refer to table 4 7 table 4 7 Fuses Voltage selector Fuse 115 10AT 230 6 3AT Note The PLN 1LA10 Loop Amplifier is delivered with a 6 3AT fuse 3 Connect a locally approved power cable from the loop amplifier to a power outlet refer to figure 4 7 PLN 1LA10 Loop Amplifier figure 4 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 9 max volume 75 dB min volume mute Headroom 25 dB Bosch Security Systems 2005 05 9922 141 50672en Plena Loop Amplifier Installation and User Instructions External Connections en 25 4 7 Slave to Master 4 8 Slave to slave Connect the 0 Slave Out socket or 90 Slave Out ofthe Connect the 0 Slave Out socket of the slave loop master loop amplifier to the Master in socket of the slave amplifier to the Master in socket of the next slave loop loop amplifier For an example refer to the connection amplifier For an example refer to the connections from from Master to Slave 2 in figure 4 8 and the connection Slave 1 to Slave 3 and Slave 2 to Slave 4 in figur
11. 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 Amplifiers work together to create a magnetic field that has the same strength throughout the whole covered area and drops rapidly to zero beyond the borders of the covered area This is achieved by introducing a phase difference of 90 in the electric current that flows through two adjacent induction loops Bosch Security Systems 2005 05 9922 141 50672en Plena Loop Amplifier Installation and User Instructions System overview en 11 1 2 3 Plena l oop Amplifier odB I 3 5 10 L 4 LLLI Bin i Current Fault o Power DO 4 O2 aA 9 Master lt 1 O OO Ole e x y i E 4 9 S DU e 7 Integrity 11 10 9 8 7 6 5 4 12 13 l WS oA Ou POST Anp s i Line fuse 230V 3A m 115V 6A o Qurwo CIS m NET o bido 252428 22 21 20 19 figure 1 3 Front and rear views Priority 100V input o E 3 t Master in Master Tone m 0 Out Y Mo Wf H Priori H Limiter H CD y Com ZE control 90 Slave out
12. Plena Loop Amplifier Security Systems Installation and User Instructions en IPLN 1LA10 BOSCH Plena Loop Amplifier 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 Bosch Security Systems 2005 05 9922 141 50672en Plena Loop Amplifier Installation and User 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 Bosch Security Systems 2005 05 9922 141 50672en Plena Loop Amplifier Installation and User Instructions About this manual About this manual Function The Installation and User Instructions gives the installers and operators the necessary data to install configure and operate the Plena Loop Amplifier Digital version The Installation and User Instructions is available as a digital file Portable Document File PDF When the PDF refers you to a location that contains more data you can click the text to go there The text contains hyperlinks Precautions and notes The Installation and Use
13. RC CENE 33 A de ete epa pe venio nate ee teer ditate tee peru Ebo ad Die Te eR ERRARE REA taa 34 6 5 Condition LEDs agre n OH UR IDE eid c I de 34 Bosch Security Systems 2005 05 9922 141 50672en Plena Loop Amplifier Installation and User Instructions System overview 1 System overview 11 Loop amplifier The PLN 1LA10 Plena Loop Amplifier has been designed as a very high quality amplifier for medium to large size induction loop systems Ease of installation and use have been major factors in the design combined with optimized performance figure 1 1 Plena Loop Amplifier table 1 1 Performance Frequency response 60 Hz to 10 kHz 1 3 dB 10 dB rated output Distortion lt 1 rated output 1 kHz Bass control 8 8 dB 100 Hz Treble control 8 8 dB 10 kHz table 1 2 Certifications and approvals EMC emission acc to EN55103 1 EMC immunity acc to EN55103 2 Safety acc to EN60065 Induction loop systems acc to EN60118 4 acc to IEC118 4 en 9 1 2 Induction loop systems 1 2 1 Introduction An induction loop system consists of a looped wire that is installed along the walls of a room and a loop amplifier 1 2 2 Principle The loop amplifier changes incoming audio signals in an alternating electric current that is sent through the induction loop The strength and frequency of the electric current varies with the tone and the
14. ain when the distance between them and the speaker is more than 2 m The induction loop to which the hard of hearing people can listen with their assistive listening devices virtually reduces the distance to the speaker Their distance to the speaker seems equal to the distance between the speaker and the microphone 1 3 Plena The Plena Loop Amplifier is part of the Plena product range Plena provides public address solutions for places where people gather to work worship trade or simply enjoy themselves It is a family of system elements that are combined to create public address systems tailored for virtually 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 en 10 1 4 Block diagram Refer to figure 1 4 for a block diagram of the Plena Loop Amplifier 15 Supervision All vital functions of the loop amplifier are supervised The loop amplifier checks its internal power amplifier the integrity of the connected induction loop and the priority input with a pilot tone When a supervised function fails a LED on the front panel of the loop amplifier is lit and the fault contact is de energized 16 Quadrature system
15. amplitude of the incoming audio signal and generates an alternating magnetic field inside the induction loop People with assistive listening devices who are located inside the induction loop can put their assistive listening devices in the T or MT mode to listen to the audio signals In the T or MT mode 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 This audio signal is not entirely the same as the incoming audio signal of the loop amplifier because the assistive listening devices also compensate for individual hearing disabilities for example signal strength and frequency range T MT gt 13 GL N3 Js o figure 1 2 Assistive listening device table 1 3 Assistive listening device No Description 1 Tele coil 2 Microphone 3 Gain control 4 Amplifier 5 Earphone Bosch Security Systems 2005 05 9922 141 50672en Plena Loop Amplifier Installation and User Instructions System overview 1 2 3 Benefits Ambient noise prevents hard of hearing people from listening to a specific sound in a room The ambient noise can result from other people in the room equipment but also from the acoustics Depending on the acoustics of the room hard of hearing people already find the reflected noise a str
16. automatic gain control AGC or the limiter refer to section 5 7 2 25 AGC range control Controls the range of the automatic gain control see section 5 7 3 Bosch Security Systems 2005 05 9922 141 50672en Plena Loop Amplifier Installation and User Instructions Design and planning 2 Design and planning 24 Introduction We advise you to contact the local association of hard of hearing people to make sure that the induction loop system will be satisfactory in every way 2 2 System types 2 24 Simple system A simple induction loop system consists of a master loop amplifier with one or more induction loops refer to figure 2 1 and figure 2 2 figure 2 1 Simple system single loop en 13 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 figure 2 2 Simple system multiple loops 2 2 2 Quadrature systems 2 2 21 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 Amplifiers work together to make a magnetic field that has the same strength throughout the whole covered area drops fast to zero beyond the borders of the covered area Bosch Security Systems 2005 05 9922 141 50672en Plena Loop Amplifier Installation and User Instructions
17. e 4 8 from Master to Slave 1 in figure 4 8 Master Slave 1 Slave 3 figure 4 8 Master and slave loop amplifiers Bosch Security Systems 2005 05 9922 141 50672en Plena Loop Amplifier Installation and User Instructions External Connections en 26 Intentionally left blank Bosch Security Systems 2005 05 9922 141 50672en Plena Loop Amplifier Installation and User Instructions Configuration 5 Configuration 51 Master and slaves Set the Master in Slave out switches on the rear of all loop amplifiers refer to figure 5 1 in the induction loop system in the correct position The Master Slave switch of the master loop amplifier must be in the Master position The Master Slave switch of all slave loop amplifiers must be in the Slave position PRE Amp POST Amp Master Slave figure 5 1 Master Slave switch Note Slave loop amplifier can only send the signal that they receive from the master loop amplifier to their induction loops The audio inputs and the priority input of the slave loop amplifiers are disabled en 27 5 2 Electric current 5 2 1 Master induction loops Do as follows 1 Connect a pink noise source to audio input 2 on the rear of the master loop amplifier 2 Connect the master loop amplifier to the mains power supply with a power cable 3 Set the AGC Limiter switch on the rear of the master loop ampli
18. er operates correctly the internal relay is energized NC position e If supervision is on and the loop amplifier does not operate correctly the internal relay is de energized NO position 5 6 Priority input You can set the volume of the audio signal that the 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 Priority input _A figure 5 4 Priority input volume control en 29 5 7 AGC Limiter 5 71 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 are not sent to the connected induction loops 5 7 2 Switch on and off You can switch automatic gain control AGC on and off with the AGC Limiter switch The AGC Limiter switch is on the rear of the loop amplifier refer to figure 5 5 Toswitch on AGC set the AGC Limiter switch in the AGC position When AGC is on the limiter is disabled Note Do not forget to configure the AGC range refer to section 5 7 3 To switch on the limiter set the AGC Limiter switch in the Limiter position When the limiter is on AGC is disabled AGC Limiter figure 5 5 AGC Limiter switch Bosch Security Systems 2005 05 9922 141 50
19. eter For example in a rectangular room with a width W of 10 m and a length L of 30 m the wire length is 80 m According to figure 2 9 the wire diameter must be between 0 77 and 1 34 mm Thus you can use AWG 20 wire or a wire with a standard diameter of 1 00 mm 2 3 4 Magnetic field strength For the best audio quality the vertical component of the magnetic field must be 100 mA m 3 dB at 1 2m above the floor in the area that is surrounded by an induction loop The strength of the magnetic field depends on the electric current through the induction loop Peaks in the strength of the magnetic field must be less than 400 mA m at 1 2 m above the floor in the area that is surrounded by the induction loop 2 3 5 Connection Refer to section 4 1 for instructions that tell you how to connect an induction loop to the loop amplifier 2 3 6 Configuration Refer to section 5 2 for instructions that tell you how to configure the electric current through the induction loop Bosch Security Systems 2005 05 9922 141 50672en Plena Loop Amplifier Installation and User Instructions Design and planning en 17 3 2 E NE P US DS NE DD 1 Il 0 1 2 3 4 5 tn 6 ER Ks 7 o 8 z e 9 o 10 11 dal omm T E E i ra d 12 d Paty y
20. fier in the Limiter position 4 Switch on the pink noise source 5 Set the signal strength of the output signal of the pink noise source to 0 dBV 6 Switch 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 strength in each master induction loop is 100 mA m Note Instead of a pink noise source you can use a sine wave of 1 kHz Then the magnetic field strength must be 70 mA m in each master induction loop 9 Switch off the master loop amplifier with the power switch on the front 10 When the induction loop system contains slave loop amplifiers configure the electric current through the slave induction loops refer to section 5 2 2 Bosch Security Systems 2005 05 9922 141 50672en Plena Loop Amplifier Installation and User Instructions Configuration 5 2 2 Slave induction loops Do as follows 11 Disconnect the master induction loops from the master loop amplifier 12 Connect the slave loop amplifier to the mains power supply with a power cable Set the AGC Limiter switch on the rear of the slave loop amplifier in the Limiter position 1 ice 14 Sw
21. gnetic field strength drops Amaster loop amplifier M with one or more even more rapid to zero beyond the borders of the induction loops All master induction loops must covered area Such a system consists of have the same size A master loop amplifier M with one or more An odd number of slave amplifiers S1 S2 S3 etc induction loops All master induction loops must with one or more induction loops All slave have the same size 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 A induction loops must have the same size Note Two slave amplifier S2 and S3 in this example with Although it is not required the sizes of the one induction loop The width of the induction loops master and slave induction loops are typically must be between 50 and 66 of the width of the the same master induction loops 50 6690W eb Co z 50 6690W S3 CD NO figure 2 6 Low spill system example figure 2 5 Expanded system example Bosch Security Systems 2005 05 9922 141 50672en Plena Loop Amplifier Installation and User Instructions Design and planning 2 3 Induction loops 2 3 1 Introduction When you make an induction loop you must take a number of parameters into consideration However sometimes there are special situations which make the design and planning of the induction loop even more
22. itch on the master loop amplifier with the power switch on the front of the master loop amplifier 15 Switch on the slave loop amplifier with the power switch on the front of the slave loop amplifier When the induction loop system contains more than one slave loop amplifier make sure that all other slave loop amplifiers are off 16 Increase the volume of audio input 2 of the slave loop amplifier with its volume control until the Limiter LED on the front of the slave loop amplifier comes on 17 Increase the electric current through the slave induction loops with the Master volume control on the front of the slave loop amplifier until the magnetic field strength in each slave induction loop is 100 mA m pink noise source or 70 mA m sine wave of 1 kHz 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 Note Do not forget to re connect all induction loops after you have configured the electric current through the induction loop of the last loop amplifier en 28 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 sure that nobody can change the electric current through the induction loop that is connected to the loo
23. nd section 6 2 en 12 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 condition of the loop amplifier to other equipment refer to section 4 4 16 Supervision switch Switches supervision of the priority input on and off refer to section 5 4 17 Voltage selector Selects the voltage on which the loop amplifier must operate refer to section 4 6 18 Power inlet Connects the loop amplifier to the mains power supply with a power cable refer to section 4 6 19 Ground screw Connects the loop amplifier to ground 20 Induction loop output Connects the induction loop to the loop amplifier refer to section 4 1 21 Audio inputs Connects the loop amplifier to external audio inputs refer to section 4 2 22 Priority input Connect the loop amplifier to systems that can override the audio signal on the induction loop refer to section 4 3 For example a Plena Voice Alarm System or a Praesideo system 23 Frequency range switch Select the frequency range of the audio signal on the induction loop refer to section 5 8 24 AGC Limiter switch Selects the
24. ngth coin a ici 16 DAD ConneCtiOn rin AE 16 253 62 NN 16 2 44 Potential problems ad 18 DIAM Metas ao 18 Meum ada ati da ario coat ER 18 24 3 A O O PO RO tavustesueaataceesbuaraativasbideh tare 18 uSE ennea 19 4 External connections su 21 44 Induction loOps eee a t 21 LV A a e aa aa iaa aaa N ai 21 SS A A E E A A T 22 44 AAA e e o ER eaa ats 23 BS AAA A o oo on A 23 NN 23 AT Slave to Masia 25 O NAO 25 5 Configuration Bosch Security Systems 2005 05 9922 141 50672en Plena Loop Amplifier Installation and User Instructions Table of contents en 8 Ord Masteran a slaves ien ibi init ladilla leuttstushcdvncesddeateadsstuingrhearaetteua dali dd 27 A O O ANO 27 5 2 1 Master Induction loops iii taa 27 5 2 2 Slave induction lo pS ii A AA raa rad 28 LS Bracket uineam enema do ad Aaa 28 5 3 Metal loss compensa lilon id 28 DA SUI Io 29 A UL Contact RPP POP II NI 29 5 6 A nn en 29 5 7 AGO MA AAA arate 29 E o o O ON 29 E A NO 29 STARS A gt 11 e A Io O 30 5 8 Frequency range ii A 30 59 A dio Ss dd 30 BT 5S6nSitiVIty A Ai De adv pae 30 5 9 2 iPhantomipoWeE itte O O 30 DUB DICO ACHVallOn A RU arce riae te ater eer Ee HD E HERE ag 31 Ge O X 33 6 1 SWECON t E 33 MEER 33 CI ME
25. nits of temperature IO a io 20 32 F 82 Bosch Security Systems 2005 05 9922 141 50672 Plena Loop Amplifier Installation and User Instructions Table of contents en 7 Table of contents Important safeguards pre u i tn O 2O2 About this Manual 5 Table of contents 1 System overview Ted o E AAA e PO OR OO o PO O 9 EA o LTS OO 9 LIDIA INTO UC iaa ER 9 1 22 PO a 9 123 A O O TAO 10 DBs PLOT O ANA 10 1 4 Block diagram iii A dd 10 1 5 SUPCIVISION xin ticas Det ded eed Fo Ole thee ve er raa RR UAE GUT aa Du Ree pee Ra De EA ud E cn Dee eodd 10 IEEE AS niiauiee hii ashi ania a aaa nian dadanianiinininal haan Aae 10 1 7 Controls connectors and indicators inn ia ii eR Roe epe e eR ete detenti eine bedeutet 12 1 715 O A le eR OOO RNE 12 O A O E OTTO 12 2 Design and planning 13 PEE iecit EE 13 2 2 System NN 13 2 2 1 Simple SyStelm sodio eerte tutte tcu tate iid diete i edi tit det 13 2 2 2 Ouadrature Syslems e egit trt per redeo E eigen etd osi i D eeepc par pe Pe ied atea 13 2 2 3 Expanded quadrature Systems cnica tette aa tra titre ttti Elda ra raa Pecan nd fe ta dnas 15 2 2 4 Lowespill system is 15 DI MUCHO IO up 16 2 3 1 InttOdUCllon s iier oett a habe tp Pen 16 2 3 2 JPOSILIOD A a aa 16 PACE A AL E A O ANA 16 2 3 4 Magnetic field stre
26. osch Security Systems 2005 05 9922 141 50672en Plena Loop Amplifier Installation and User Instructions Operation 6 Operation 6 1 Switch on Push the Power switch to switch on the loop amplifier The Power switch is on the front of the loop amplifier refer to figure 6 1 Power figure 6 1 Power switch When the mains power supply is available the green power LED on the front of the loop amplifier refer to figure 6 2 comes on 0 dB I 6 dB IL 20 dB Li I figure 6 2 Power LED 6 2 Switch off Push the Power switch to switch off the loop amplifier The Power switch is on the front of the loop amplifier refer to figure 6 1 The green power LED on the front of the loop amplifier refer to figure 6 2 goes off en 33 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 PN Caution Do not change the volume of the audio signal on the connected induction loops with the Master volume control When you change the position of the Master volume control you change the magnetic field of the connected induction loops 5 N E N O O figure 6 3 Input volume controls Note The volume of the audio signal on the priority input is configured with a volume control on the rear of
27. p amplifier figure 5 2 Cover bracket 5 3 Metal loss compensation Do as follows 1 Turn the Metal loss compensation control on the rear of the loop amplifier to the leftmost position 2 Connect headphones to the headphones socket on the front of the loop amplifier to listen to the audio signal that is sent to the connected induction loops 3 With the same headphones listen to the audio signal on the induction loops through an induction loop receiver 4 Turn the Metal loss compensation control to adjust the tone of the audio signal on the induction loops 5 Repeat the procedure for the other loop amplifiers in the induction loop system Bosch Security Systems 2005 05 9922 141 50672en Plena Loop Amplifier Installation and User Instructions Configuration 5 4 Supervision You can switch supervision refer to section 1 5 on and off with the Supervision switch The Supervision switch is on the rear of the loop amplifier refer to figure 5 3 To switch on supervision set the Supervision switch in the ON position To switch off supervision set the Supervision switch in the OFF position Supervision A eem On Off figure 5 3 Supervision switch 5 5 Fault contact You can configure the fault contact with the Supervision switch refer to section 5 4 e If supervision is off the internal relay is de energized NO position e If supervision is on and the loop amplifi
28. r 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 en 5 Signs The Installation and User Instructions shows each precaution with a sign The sign shows the effect if you do not obey the instruction Precaution General sign for cautions and warnings Precaution Risk of electric shock B The sign that is shown along with a note gives more data about the note itself Note General sign for notes Note Refer to another information source E ie Bosch Security Systems 2005 05 9922 141 50672 Plena Loop Amplifier Installation and User Instructions About this manual Conversion tables Length mass and temperature are in SI units Refer to the data below to change SI units to imperial units table 1 Conversion of units of length en 6 1 in 25 4 mm 1mm 0 03937 in 1 in 2 54 cm 1cm 0 3937 in 1ft 0 3048 m 1mz 3 281 ft 1mi 1 609 km 1 km 0 622 mi table 2 Conversion of units of mass 1 lb 0 4536 kg 1kg 2 2046 Ib table 3 Conversion of units of pressure 1 psi 68 95 hPa 1 hPa 0 0145 psi Note 1 hPa 1 mbar table 4 Conversion of u
29. ty Switchable input 1 mutes input 2 Bosch Security Systems 2005 05 9922 141 50672en Plena Loop Amplifier Installation and User Instructions External Connections en 22 4 3 Priority input For example you can connect a Plena Voice Alarm You can connect other devices or systems to the priority System refer to figure 4 3 to the priority input input The priority input has a higher priority than audio input 1 and audio input 2 When the priority WN input receives a signal the loop amplifier replaces the Caution signal on the connected induction loops with the signal Install the safety bracket on the priority input to of the priority input make sure that it is not possible to touch the priority input refer to figure 4 4 PLN 1LA10 Loop Amplifier LBB1990 00 Voice Alarm Controller figure 4 4 Safety bracket table 4 3 Priority input details Number of connections 1x screw terminal figure 4 3 Priority input connection Location Rear side Input sensitivity 100 V transformer balanced Signal to noise ratio 63 dB max volume 75 dB min volume mute Headroom 25 dB Bosch Security Systems 2005 05 9922 141 50672en Plena Loop Amplifier Installation and User Instructions External Connections 4 4 Fault output With the fault output refer to figure 4 5 you can send the condition of the loop amplifier to external de
30. vices for example sounders en 23 4 5 Line output You can connect a recording device for example a tape deck to the line output of the loop amplifier refer to figure 4 6 PLN 1LA10 Loop Amplifier figure 4 5 Fault output relay The fault output is an internal relay By default NC is connected to COM When a supervised function of the loop amplifier fails the relay connects NO to COM table 4 4 Fault output details Number of connections 1x screw terminal Location Rear side Contacts Voltage free max 100 V 2A Signal to noise ratio 63 dB 9 max volume 75 dB min volume mute Headroom 25 dB PLN 1LA10 Loop Amplifier figure 4 6 Line output connection table 4 5 Line output details Number of connections 1x XLR plug Location Rear side Nominal level 1V Impedance 200 0 4 6 Power supply To connect the loop amplifier to a mains power supply do as follows 1 Set the voltage selector on the rear of the loop amplifier to the correct position refer to table 4 6 table 4 6 Voltage selector Power supply voltage Voltage selector 100 to 120 V AC 115 220 to 240 V AC 230 Note The PLN 1LA10 Loop Amplifier is delivered with the voltage selector in the 230 position Bosch Security Systems 2005 05 9922 141 50672en Plena
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