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Installation and User Instructions

PLN-1LA10en

Plena Loop Amplifier

Summary of content (36 pages)

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Plena Loop Amplifier Installation and User Instructions en PLN-1LA10
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Plena Loop Amplifier | Installation and User Instructions | Important safeguards 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.
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Plena Loop Amplifier | Installation and User Instructions | Acknowledgements 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.
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Plena Loop Amplifier | Installation and User Instructions | About this manual en | 5 About this manual Signs Function The Installation and User Instructions shows each precaution with a sign. The sign shows the effect if you do not obey the instruction. The Installation and User Instructions gives the installers and operators the necessary data to install, configure and operate the Plena Loop Amplifier. Precaution General sign for cautions and warnings.
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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 1 in = 25.4 mm 1 mm = 1 in = 2.54 cm 1 cm = 1 ft = 0.3048 m 1m= 1 mi = 1.609 km 1 km = 0.03937 in 0.3937 in 3.281 ft 0.622 mi table 2: Conversion of units of mass 1 lb = 0.4536 kg 1 kg = 2.2046 lb table 3: Conversion of units of pressure 1 psi = 68.
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Plena Loop Amplifier | Installation and User Instructions | Table of contents en | 7 Table of contents Important safeguards ...................................................................................................................................................3 Acknowledgements.......................................................................................................................................................4 About this manual ..................................................
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Plena Loop Amplifier | Installation and User Instructions | Table of contents en | 8 5.1 Master and slaves ................................................................................................................................................................ 27 5.2 Electric current ...................................................................................................................................................................... 27 5.2.1 Master induction loops ...................
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Plena Loop Amplifier | Installation and User Instructions | System overview 1 System overview 1.1 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.
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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 strain when the distance between them and the speaker is more than 2 m.
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Plena Loop Amplifier | Installation and User Instructions | System overview en | 11 1 2 1 0 dB -6 dB 3 5 10 Fault Current -20 dB 1 Power 2 0 Master _ 0 11 _ + 10 + 9 12 Loop Integrity AGC Limiter 7 6 5 0 8 13 14 15 4 16 17 115V Line Out Master In VU LED Slave Out 0º Fault 230V Apparatus delivered Connected for 230V 90º Supervision PRE Amp. POST Amp.
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Plena Loop Amplifier | Installation and User Instructions | System overview 1.7 1.7.1 Controls, connectors and indicators 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.
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Plena Loop Amplifier | Installation and User Instructions | Design and planning 2 Design and planning 2.1 Introduction 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). 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 2.2.
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Plena Loop Amplifier | Installation and User Instructions | Design and planning 2.2.2.2 Simple quadrature system A simple quadrature system consists of (refer to figure 2.3): • A master loop amplifier (M) with one induction loop. • A slave loop amplifier (S) with one induction loop. Note Although it is not required, the sizes of the master and slave induction loops are typically the same. en | 14 To cover larger areas, create a basic system with multiple induction loops (refer to figure 2.
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Plena Loop Amplifier | Installation and User Instructions | Design and planning 2.2.3 Expanded quadrature systems To cover very large areas, create an expanded quadrature system (refer to figure 2.5 for an example). 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, S2, S3, etc.) with one or more induction loops. All slave induction loops must have the same size.
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Plena Loop Amplifier | Installation and User Instructions | Design and planning 2.3 Induction loops 2.3.1 Introduction 2.3.3 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 important. A number of potential problems and solutions will be discussed later. 2.3.
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Plena Loop Amplifier | Installation and User Instructions | Design and planning 3 en | 17 10 2 1 0 -1 -2 20 -3 power (dB) -4 -5 30 -6 -7 40 -8 -9 50 -10 -11 60 -12 70 -13 -14 -15 80 -16 90 -17 100 -18 -19 0 10 20 30 40 50 60 70 80 90 100 width (%) figure 2.8: Extra power vs. the width of the room 3.00 2.75 2.50 wire diameter (mm) 2.25 2.00 1.75 1.50 1.25 1.00 AWG 20 0.75 0.50 0.25 0.00 0 25 34 50 30 76 90100 135 150 figure 2.9: Wire diameter vs.
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Plena Loop Amplifier | Installation and User Instructions | Design and planning 2.4 Potential problems 2.4.1 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).
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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.
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Plena Loop Amplifier | Installation and User Instructions | External Connections 4 4.1 en | 21 External connections 4.2 Induction loops You can connect audio sources to the audio inputs of the loop amplifier. For example, you can connect a power amplifier and a microphone (refer to figure 4.2). Audio inputs Connect the induction loops to the rear of the loop amplifier (refer to figure 4.1). Always twist wires that run parallel and close to each other to avoid additional and undesired inductions.
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Plena Loop Amplifier | Installation and User Instructions | External Connections 4.3 Priority input You can connect other devices or systems to the priority input. The priority input has a higher priority than audio input 1 and audio input 2. When the priority input receives a signal, the loop amplifier replaces the signal on the connected induction loops with the signal of the priority input. en | 22 For example, you can connect a Plena Voice Alarm System (refer to figure 4.3) to the priority input.
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Plena Loop Amplifier | Installation and User Instructions | External Connections 4.4 Fault output 4.5 With the fault output (refer to figure 4.5), you can send the condition of the loop amplifier to external devices (for example, sounders). en | 23 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).
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Plena Loop Amplifier | Installation and User Instructions | External Connections 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 115 230 Fuse 10AT 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).
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Plena Loop Amplifier | Installation and User Instructions | External Connections 4.7 Slave to Master 4.8 Connect the 0° Slave Out socket or 90° Slave Out of the master loop amplifier to the Master in socket of the slave loop amplifier. For an example, refer to the connection from Master to Slave 2 in figure 4.8 and the connection from Master to Slave 1 in figure 4.8.
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Plena Loop Amplifier | Installation and User Instructions | External Connections Intentionally left blank.
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Plena Loop Amplifier | Installation and User Instructions | Configuration 5 Configuration 5.1 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. Master In VU LED Slave Out 0º 90º PRE Amp. POST Amp.
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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. 13 Set the AGC/Limiter switch on the rear of the slave loop amplifier in the Limiter position. 14 Switch on the master loop amplifier with the power switch on the front of the master loop amplifier.
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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. 5.7 AGC/Limiter 5.7.
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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 Limiter 5K 10K 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).
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Plena Loop Amplifier | Installation and User Instructions | Configuration 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.
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Plena Loop Amplifier | Installation and User Instructions | Operation 6 6.1 Operation 6.3 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). en | 33 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).
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Plena Loop Amplifier | Installation and User Instructions | Operation 6.4 en | 34 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. Master _ + _ + 0 figure 6.4: Tone controls 6.
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