Sound diffusion system

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1 English edition BTicino spa Via Messina, Milano - Italia R R INTERNTIONL ound diffusion system R R G1797GB

2 R ontents 2 Integrated multiroom sound diffusion system 4 Equipment overview 6 ound diffusion system with external source 7 ound diffusion system with radio tuner 8 ound diffusion system, paging and noise monitoring 9 Two-channel sound diffusion system 10 pecial systems with Paging or noise monitoring system with several 12 atalogue of basic equipment 14 atalogue of two-channel sound diffusion system and special systems equipment 16 Recommendations 18 Wiring diagrams BTIINO s.p.a. 7/97 We reserve the right to modify at any time the technical characteristics of the products described in this publication. 1

3 Integrated multiroom sound diffusion system ound diffusion system With the Living International and Light series the soundreproducing system evolves and improves. In addition to the reproduction, in all the rooms, of signals originating from external sources, such as tape recorders or hi-fi systems, now the new sound diffusion system also features the radio tuner that can turn on at a preset time. While the external source signal is adapted to the sound system s characteristics by an input preamplifier, the signal originating from the radio tuner goes directly to the local amplifiers. These, connected to the flush mounted, enable to turn on the sound diffusion system by remote control and to regulate the volume in every room. Furthermore, from every listening point it is possible to select, with a two-way switch and a pushbutton, the sound source that has to be reproduced and one of the five channels stored in the radio tuner s memory. Paging system If modules fitted with a microphone are added to the sound-reproducing equipment, it is possible to add the paging function and the ambient noise monitoring function to the sound diffusion system. When the paging and noise monitoring functions are activated, the sound source will become instantaneously silent and the message or room noise will be transmitted. Input preamplifier R 2

4 Paging module Noise monitoring module Radio tuner

5 Living International and Light sound diffusion system Equipment overview Living International equipment E45/24D power supply E45/24/4 device for 48 extension device Living sound diffusion system L4481 preamplifier L4499 relay for external source control L4488 paging module L4753 connection cable L4492 radio tuner L4489 noise monitoring module L4005/0 L4925G pushbutton with key cover for radio channel selection local preamplifier L4003 two-way switch for sound source selection 4958 loudspeaker 4

6 R Light equipment E45/24D power supply E45/24/4 device for 48 extension device Light sound diffusion system N4481 preamplifier N4499 relay for external source control N4488 paging module L4753 connection cable N4492 radio tuner N4489 noise monitoring module N4005/0 N4925G pushbutton with key cover for radio channel selection N4485 local preamplifier N4003 two-way switch for sound source selection N4958 loudspeaker 5

7 Living International and Light sound diffusion system ound diffusion system with external source Description The basic system for the reproduction of an external sound source consists of the following equipment: - a power supply to be placed in the home s distribution board - an input preamplifier to be installed in the room where the sound source is located - several local amplifiers with the corresponding to be installed in the rooms where the sound has to be reproduced. Only three conductors are needed to wire the whole system. L4481 The power supply ( No. E45/24D) furnishes all the system s components with 24V d.c. safety extra low voltage (ELV) for their operation. It is modular with the Btdin series for its installation in the home s distribution board. The input preamplifier ( No. L/N4481) adapts the signal originating from the external sound source to the system s characteristics and must be installed close to the sound source. It takes up the space of two modules and has, on the front, a 3.5 mm jack for the connection to the sound source with the special shielded cable No. L4753. The preamplifier can control a monostable relay ( No. L/N4499) for remote turning on and off of the sound source concurrently with the activation of the local amplifier module. N4481 N4485 The local amplifier ( ) is installed in every room where sound has to be reproduced. It regulates the volume of the signal sent to the loudspeaker. Its turning on determines the simultaneous activation of both the input preamplifier and the external sound source. The loudspeaker ( No. N/4958) consists of a speaker and a plastic covering and protection mesh with a size suitable for its installation in flush mounted boxes No. 506E. The technical characteristics of the loudspeaker guarantee top quality reproduction of sound even when several are connected in parallel for sound reproduction in large rooms. N Basic sound diffusion system with external source 2 Wires 3 Wires E45/24D L4499 L

8 R ound diffusion system with radio tuner Description By using the radio tuner ( No. L/N4492), it is possible to set up a simplified sound diffusion system. In fact, the device is directly connected to the local amplifier without the signal being processed by the preamplifier. The sound diffusion system with radio tuner consists of the following equipment: - a power supply to be placed in the home s distribution board. - a radio tuner - several local amplifiers with the corresponding to be installed in the rooms where the sound has to be reproduced. - a pushbutton for turning on the tuner and for the remote selection of radio channels, to be installed next to the local amplifier. The radio tuner, of the monophonic type, enables to receive FM radio stations in the frequency band 87,5-108 Mhz. Two controls on the front and a luminous display enable to select and show the desired radio frequency. Furthermore, the tuner can store in its memory five radio frequencies that can be selected with the special control on the front or with a remote control pushbutton installed at every listening point. The device also features the radio alarm and clock functions, enabling to turn on the radio at a preset time. When the tuner is off, the display shows the current time. L4005/0 L4925G L4492 N4492 N4005/0 N4925G Basic sound diffusion system with radio tuner E45/24D 2 Wires Wires L4492 L4005/0 L4925G L4005/0 L4925G 7

9 Living International and Light sound diffusion system ound diffusion system, paging and noise monitoring Description In addition to the reproduction of a music signal generated by an internal or external source, the Bticino sound diffusion system may be equipped with the following components: - a microphone for the paging function - a microphone for ambient noise monitoring The paging module ( No. L/N4488) has a built-in microphone on the front that enables to transmit the desired message to all the listening points for the time during which the special activating button is kept pressed. The activation of the paging system brings about the temporary silencing of the music signal and the simultaneous turning on of all local amplifiers. volume control on the front of the device enables to regulate the level of the transmitted signal. When the activating pushbutton is released, the reproduction of the music signal is established again. The noise monitoring module ( No. L/N4489) has a built-in microphone on the front and two volume controls that enable to set the level of the transmitted signal and the activation threshold. If in the room being monitored the ambient noise level exceeds the set threshold, the device automatically transmits the signal that will be reproduced only at the activated listening points. L4488 L4489 N4488 N4489 ound diffusion system and paging 2 Wires 4 Wires 5 Wires E45/24D L4499 L L4489 8

10 R Two-channel sound diffusion system Description To set up a two-channel system it is necessary to use a two-way switch ( No. L/N4003) for the selection between two different sound sources. Three types of systems with different sources may be set up, such as: - two external sources with their corresponding preamplifiers; - one external source with its preamplifier plus an internal source consisting of a radio tuner; - two radio tuners. Two-channel sound diffusion system (tuner external source) E45/24D 2 Wires 3 Wires L4499 L4481 L4492 L4003 L4003 9

11 Living International and Light sound diffusion system pecial systems with 48 Description In order to reproduce the sound in large premises or in rooms located on different floors, the Bticino sound diffusion system may be extended up to a maximum of 48. In this case, the supply for the whole system is provided by 4 power supplies No. E45/24D connected to each other by means of a special module No. E45/24/4. E45/24/4 Two-channel sound diffusion system with L4499 L4481 L E45/24D E45/24D 4958 E45/24/ E45/24D E45/24D 10

12 R Paging or noise monitoring sound diffusion system with several Description If one or more microphone modules are used instead of music sources, it is possible, with an installation that has a maximum of 48 listening points, to set up an efficient paging system, particularly useful in large premises or in buildings with several floors (hospitals, service industry premises, etc.). When designing the system, it must be borne in mind that for every microphone module added to the system a loudspeaker has to be subtracted from the total number that may be connected. Example: - system with 1 microphone and a maximum of 48 ; - system with 2 microphones and a maximum of 47 ; - system with 3 microphones and a maximum of L4488 L E45/24D E45/24D 4958 E45/24/ E45/24D E45/24D 11

13 Living International and Light sound diffusion system atalogue of basic equipment Power supply No. E45/24D This switching device, selfprotected against shortcircuits and overloads and built in compliance with IE 742 (EI 96-2) standard, provides an output safety extra low voltage (ELV) for the proper supply to all the system s functions. Technical characteristics Input voltage: 220V a.c. ± 10% - 50/60Hz bsorbed power: 36 V Output voltage: 24V d.c. ontainer for snap assembly on DIN rail, takes up 6 modules 17.5 mm Input preamplifier No. L/N4481 This device adapts the input signal to the characteristics of the sound diffusion system. On its front there is a knob for the regulation of the input sensitivity and two LEDs (green and red) indicating the correct regulation. till on the front there is a 3.5 mm jack for the connection to the sound source by means of a flying cable. When activated, the preamplifier generates a signal for the control of a monostable relay ( No. L/N4499) used for the remote control of the sound source. ON/OFF switch input jack Ø 3.5 mm input sensitivity regulation Technical characteristics Input impedance: 22 kω Input sensitivity: from 100 mv to 1V Output signal level: 5 Vpp Frequency response: from 20 to 20,000 Hz ignal-to-noise ratio: 60 db Input voltage: from 20 to 24V d.c. Dimensions: 2 modules Protected against short-circuit and polarity reversal. LED indicating optimal regulation ON/OFF LED amplifier The local amplifier enables to drive one or two No. N/4958. The on/off switch is on the front and it determines the remote turning on of the input preamplifier and of the sound source. There also are two pushbuttons to set the volume. Technical characteristics R.M.. power: 0.5W over 22Ω and 1W over 11Ω Musical power: 2W over 22Ω and 4W over 11Ω Frequency response: from 20 to 20,000 Hz ignal-to-noise ratio: 60 db Input impedance: 10 kω Output impedance: greater than 10Ω Input voltage: from 20 to 24V d.c. Dimensions: 2 modules Protected against short-circuit and polarity reversal. ON/OFF switch ON/OFF LED volume control volume control No. N/4958 The loudspeaker for flush mounting in box No. 506E (106x117x52 mm) consists of speaker case, loudspeaker and front cover mesh. It has a typical impedance of 22Ω and a rated power of 6W. The loudspeaker s diameter is 65 mm. box No. 506E 1 2 fixing slot speaker case with loudspeaker front cover mesh 12

14 R Input preamplifier L4481 input preamplifier with 3.5 mm jack - input N4481 voltage 24V d.c. - input sensitivity may be regulated between 100mV and 1V - control for turning on the sound system and the sound source - 2 modules L4481 L4499 N4485 local amplifier with individual volume control - musical output power 2W over 22 ohm - input voltage 24V d.c. - control for turning on the sound system and the sound source - 2 modules for flush mounting in box No. 506E 4958 includes speaker case and loudspeaker - snap-on front cover mesh colour grey Living - dimensions 116x116 mm N4958 as above - colour white Light N4481 N4485 N4499 Power supply E45/24D switching type power supply - input voltage - output voltage ELV 24V d.c. 1 - selfprotected against overload and shortcircuit - container for snap-on assembly on DIN rail, takes up 6 modules 17.5 mm L4753 Monostable auxiliary relay L4499 monostable auxiliary relay (release) with 1 N4499 NO contact (6 resistive/2 inductive) 230V a.c. - 24V d.c. coil to combine with preamplifier No. L/N4481 for the remote control of the external sound source onnection cable L4753 cable with adapter for connection of preamplifier No. L/N4481 to audio appliances with stereo jack output Ø 6.3 mm or Ø 3.5 mm - cable length 1.5 m - three-pole jack Ø 3.5 mm E45/24D 4958 N

15 Living International and Light sound diffusion system atalogue of two-channel sound diffusion system and special equipment Radio tuner No. L/N4492 This device with the radio alarm function can be installed together with an input preamplifier in two-channel systems, or without the preamplifier in one-channel systems. It can tune in FM stations by manual selection with pushbuttons (6) and (7) and store in the memory up to 5 channels that may be selected with pushbutton H (8) or with external pushbuttons connected to the rear terminal. By pressing the H pushbutton or external pushbuttons when the radio is off, it turns it on (remote control). The luminous display can show the frequency of the selected channel, the current time, the preset time for the radio alarm, the selected channel and whether the alarm is on or off. n internal buffer battery keeps up the set data and the current time if there is a supply failure, in which case the display is not luminous and the pushbuttons are not active. Pushbuttons (2) and (3) enable to set the overall maximum volume which can be locally reduced with the pushbuttons of the amplifiers. The device is equipped with a wire antenna to be inserted in the conduit of the electrical installation. Technical characteristics Input voltage: 24V d.c. bsorbed power: 150 m (radio ON) 30 m (radio OFF) Output signal: 4 Vpp over 10 kω Frequency band PLL: MHz Dimensions: 3 modules 9 8 ON/OFF P - M H Pushbutton functions 1 - ON/OFF 2/3 - Overall maximum volume control 4 - selection of alarm time, current time or frequency display 5 - radio alarm on/off 6/7 - Time regulation or frequency selection 8 - Radio ON or channel change (in parallel with external pushbuttons) 9 - urrent time setting or alarm time presetting 7 6 Paging module No. L/N4488 The paging module has a built-in microphone on the front by means of which it is possible to send messages by voice; a pushbutton enables the activation of the microphone. For all the time during which the activating button is kept pressed the music reproduction is interrupted and the message is transmitted to all the listening points. When the activating pushbutton is released, the previous condition is established again. The volume of the transmitted message can be set with a knob on the device and is independent of the settings made at the each listening point. ON/OFF light volume control microphone activating pushbutton microphone Noise monitoring module No. L/N4489 The noise monitoring module has a built-in microphone that picks up the ambient noise and transmits it to the active listening points in the sound diffusion system. The device may be turned on with a switch placed on the front and the activation of the microphone is automatic according to ambient noise level. The microphone activation threshold can be set, as well as the volume of the transmitted signal. ON/OFF switch ON/OFF light volume control activation threshold setting microphone active microphone light 14

16 R L4492 L4488 N4492 N4488 Radio tuner L4492 tuner with radio alarm for sound system - 5 N4492 FM channels may be preset - volume control - used combined with or instead of the input preamplifier Paging and noise monitoring modules L4488 electronic module with built-in microphone N4488 for paging - manual activation for sound system - input voltage 24V d.c. - 2 modules L4489 electronic module with built-in microphone N4489 for noise monitoring - automatic activation for sound system - input voltage 24V d.c. - 2 modules ystem extension equipment E45/24/4 device for system extension up to 48 - for the simultaneous use of max. 4 power supplies E45/24D - container for DIN rail - 3 modules 17.5 mm Two-way switch L4003 unipolar two-way switch for changeover N4003 between 2 sound sources L4489 N4489 Pushboton L4005/0 unipolar pushbutton NO V a.c. for N4005/0 radio channel selection and remote control of radio tuner No. L/N4492 L4925G interchangeable screen-printed key cover N4925G for pushbutton No. L/N4005/0 E45/24/4 L4003 L4005/0 N4003 N4005/0 L4925G N4925G 15

17 Living International and Light sound diffusion system Recommendations Installation prearrangement When the electrical installation is carried out, the conduits and flush mounted boxes must be envisaged and arranged keeping in mind that the Living International and Light sound system is supplied with safety extra low voltage (ELV), and therefore the wires will have to be placed in separate conduits. This precaution also prevents possible electromagnetic coupling problems on the signal wires. onnection wires For the electrical connection of the various components of the system it is enough to use simple unshielded single wires with 1 mm 2 cross section. Furthermore, the maximum distances for the connections between the components of the system must be observed, as indicated below: E45/24D max. n V~ L V~ 2 max 35m (1mm 2 ) max 15m (1mm 2 ) 2 N N N N L/N4481 L/N4489 L/N4485 L/N4485 L/N4485 max 150m (1mm 2 ) Note For the connections, follow the indications of the wiring diagrams described in the last part of this publication. For systems up to 48, observe the same distances indicated above for each of the 4 groups of 12. Instructions for installation and use When the components are arranged, module No. L/N4488 shall not be installed near a loudspeaker to avoid acoustic resonance phenomena (Larsen effect). The listening point and the noise monitoring module No. L/N4489, placed in the same room, shall not be turned on at the same time. maximum of 2 may be connected in parallel to each amplifier. 16

18 R onnection to sound source For the connection, the suitable shielded cables with adapter will be chosen according to the type of outputs existing on the audio appliance. Practically, considering that the input sensitivity of the preamplifier may be regulated, it is possible to use the line outputs of hi-fi systems (normally fitted with R audio coaxial connectors or with DIN connectors) as well as the outputs for or headphones. TPE RE L R HI-FI Ø 3,5 mm common R L TPE RE/PLY L 4 R 2 common preamplifier No. L/N4481 onnection with generic cable In case of more simple radios or radio recorders, it is possible to use the headphone outputs (usually jacks, mini 3.5 mm or standard 6.3 mm). Before making the connection, the volume control of the radio or radio recorder must be set at a low level, so that no distortions occur due to overload of the preamplifier input, and this setting should not be changed. In case the line outputs of the HI-FI system are used, the regulations on the appliance are not necessary because these outputs are usually fixed. TEREO HEDPHONE Ø 6,3 mm - 3,5 mm MONO HEDPHONE Ø 3,5 mm common R L common L/R mono TEREO MONO L4753 Ø 3,5 mm common R L preamplifier No. L/N4481 onnection with cable No. L

19 L N ound source Relay No. L/N4499 NO L4753 Preamplifier No.L/N4481 L R Power supply No. E45/24D L s To the other 9 L s Max. 2 for each local amplifier s Living International and Light sound diffusion system Wiring diagrams One-channel system with external sound source and 12 L L N.B. For special applications and diagrams, please contact BTicino Technical ervice Department. 18

20 R One-channel system with tuner and 12 H Max. 2 for each local amplifier L N Tuner No.L/N4492 Power supply No. E45/24D H L L To the other 9 L amplifier H L Pushbutton No. L/N4005 Pushbutton No. L/N4005 N.B. For special applications and diagrams, please contact BTicino Technical ervice Department. 19

21 Living International and Light sound diffusion system Wiring diagrams One-channel system with external sound source, microphone and 11 L N ound source 1 o L L Relay No. L/N4499 L O L Max. 2 for each local amplifier NO L4753 Preamplifier No. L/N4481 L R Powe supply No. E45/24D Microphone module No. L/N4489 No. L/N4488 o L To the other 8 N.B. For special applications and diagrams, please contact BTicino Technical ervice Department. 20

22 R One-channel system with tuner, microphone and 11 L N Tuner No.L/N4492 To the other 8 L H Pushbutton H O L L Power supply No. E45/24D Microphone module No. L/N4489 No. L/N4488 Max. 2 for each local amplifier 1 o L No. L/N4005 Pushbutton No. L/N4005 H O L N.B. For special applications and diagrams, please contact BTicino Technical ervice Department. 21

23 Living International and Light sound diffusion system Wiring diagrams One-channel system with external sound source, 2 microphones and 10 Max. 2 for each local amplifier L N ound source L4753 Relay No. L/N4499 Preamplifier No. L/N4481 NO L R Microphone module No. L/N4489 No. L/N o L Power supply No. E45/24D Microphone module No. L/N4489 No. L/N o L L L O L To the other 7 N.B. For special applications and diagrams, please contact BTicino Technical ervice Department. 22

24 R One-channel system with tuner, 2 microphones and 10 L N H Tuner No.L/N4492 Microphone module No. L/N4489 No. L/N o L Power supply No. E45/24D L Microphone module No. L/N4489 No. L/N o L L H O L Max. 2 for each local amplifier H o L To the other 7 Pushbutton No. L/N4005 Pushbutton No. L/N4005 N.B. For special applications and diagrams, please contact BTicino Technical ervice Department. 23

25 Living International and Light sound diffusion system Wiring diagrams One-channel system with external sound source and 48 To the other 11 L N ound source L4753 Relay No. L/N4499 Preamplifier No. L/N4481 NO L R E45/24D E45/24D Power supplies E45/24D E45/24D 5678 L E45/24/ L1 L2 L3 L4 uxiliary device L L L L L1 L2 L3 To the other 10 L4 To the other 11 To the other 10 N.B. For special applications and diagrams, please contact BTicino Technical ervice Department. 24

26 R One-channel system with tuner and 48 L N Tuner No. L/N4492 E45/24D E45/24D Power supplies E45/24D E45/24D H H L L L Pushbotton No. L/N4005 Pushbotton No. L/N4005 To the other 10 L1 H To the other 11 L Pushbotton No. L/N4005 Pushbotton No. L/N4005 L2 H To the other 10 L3 To the other 11 H L1 L2 L3 L4 L4 H N.B. For special applications and diagrams, please contact BTicino Technical ervice Department. 25

27 Living International and Light sound diffusion system Wiring diagrams One-channel system with external sound source, microphone and 47 L N ound source Relay No. L/N4499 NO L R L2 L3 L4 E45/24D E45/24D Power supplies E45/24D E45/24D L4753 Preamplifier No. L/N4481 Microphone module No. L/N4489 No. L/N o L 5678 L E45/24/ L L L L To the other 10 L1 To the other 10 uxiliary device To the other 11 To the other 10 L1 L2 L3 L4 N.B. For special applications and diagrams, please contact BTicino Technical ervice Department. 26

28 R One-channel system with tuner, microphone and 47 L N Tuner No.L/N4492 H E45/24D E45/24D E45/24D E45/24D Microphone module No. L/N4489 No. L/N o L 5678 L E45/24/ To the other 10 L4 H Power supplies Pushbotton No. L/N4005 L L To the other 10 L1 H L H Pushbotton No. L/N4005 Pushbotton No. L/N4005 No. N4958 To the other 10 L L2 H Pushbotton No. L/N4005 To the other 11 L3 H L1 L2 L3 L4 uxiliary device N.B. For special applications and diagrams, please contact BTicino Technical ervice Department. 27

29 Living International and Light sound diffusion system Wiring diagrams Two-channel system with external sound sources and 12 Max. 2 for each local amplifier L N ound source L4753 ound source L4753 Relay No. L/N4499 Preamplifier No. L/N4481 NO L R Power supply No. E45/24D Preamplifier No. L/N4481 L R b a L To the other 10 b a L amplifier Two-way switch No. L/N4003 L N.B. For special applications and diagrams, please contact BTicino Technical ervice Department. 28

30 R Two-channel system with external sound source, tuner and 12 L N ound source Relay No. L/N4499 NO L4753 Preamplifier No. L/N4481 L R Power supply No. E45/24D Tuner No. L/N4492 H H 1 2 L To the other 10 H 1 2 L amplifier Pushbotton No. L/N4005 Max. 2 for each local amplifier Two-way switch No. L/N4003 L N.B. For special applications and diagrams, please contact BTicino Technical ervice Department. 29

31 Living International and Light sound diffusion system Wiring diagrams Two-channel system with external sound sources and 48 L N ound source L4753 ound source L4753 Relay No. L/N4499 Preamplifier No. L/N NO L R E45/24D E45/24D 5678 L Power supply E45/24/4 E45/24D E45/24D Preamplifier No. L/N4481 a b To the other 11 L1 L R L1 L2 L3 L4 uxiliary device b a a b To the other 10 L4 Two-way switch No. L/N4003 Two-way switch No. L/N4003 L amplifier L amplifier L a b To the other 10 L2 amplifier Two-way switch No. L/N4003 L a b To the other 11 L3 amplifier Two-way switch No. L/N4003 N.B. For special applications and diagrams, please contact BTicino Technical ervice Department. 30

32 R Two-channel system with external sound source, tuner and 48 amplifier Two-way switch No. L/N4003 Tuner No. L/N4492 H Pushbotton No. L/N400 L To the other 11 Two-way switch No. L/N4003 Preamplifier No. L/N4481 Relay No. L/N4499 L R NO L N ound source a b L1 H amplifier Pushbotton No. L/N4005 H b L4753 L To the other 10 a b L2 H amplifier Two-way switch No. L/N4003 a L Pushbotton No. L/N400 - L1 L2 L3 L4 To the other 11 a b L3 H 5678 L E45/24D E45/24D No. N4958 amplifier Two-way switch No. L/N4003 Pushbotton No. L/N4005 uxiliary device E45/24/4 Power supply E45/24D E45/24D L To the other 11 a b L4 H N.B. For special applications and diagrams, please contact BTicino Technical ervice Department. 31

33 Living International and Light sound diffusion system Wiring diagrams Two-channel system with tuners and 12 Max 2. for each local amplifier L N Tuner No. L/N4492 H amplifier Tuner No. L/N4492 Power supply No. E45/24D L H H2 2 H1 1 L amplifier No. L/N4485 H2 2 H1 1 L L To the other 9 Pushbotton No. L/N4005 Pushbotton No. L/N4005 N.B. For special applications and diagrams, please contact BTicino Technical ervice Department. 32

34 R One-channel system with 2 microphones and 47 (paging system) L2 L N L3 L4 Microphone module No. L/N4489 No. L/N o L E45/24D E45/24D E45/24D E45/24D L 1 o L L 5678 L E45/24/ L L To the other 11 L1 Power supply amplifier amplifier To the other 10 Microphone module No. L/N4489 No. L/N4488 L1 L2 L3 L4 amplifier amplifier uxiliary device To the other 10 To the other 10 N.B. For special applications and diagrams, please contact BTicino Technical ervice Department. 33

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