RCF AT40T User Manual Download Page 13

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ENGLISH

RCF S.p.A. would like to thank you for purchasing this product, which 

has been designed to guarantee reliability and high performance.

DESCRIPTION

AT 40T 

volume control is made of a control circuit having a selector and a 

separated transformer.
It can be used in 100 V line systems to adjust the volume level of a loudspeaker 
group having a total power not exceeding 40 W.
All connected loudspeakers shall have 100 V line matching transformers.
It includes a 24 V dc override relay to either bypass the 6 position (5 + off) 
selector or insert a second 100 V line (not affected by the volume control) for 
paging.
It  can  operate  with  3  wire  lines  as  well  (in  order  to  make  emergency 
announcements without using the internal 24 V dc relay).

AT  40T

  can  be  installed  on  whichever  supporting  frame  for  home  /  office 

electrical  systems  by  drilling  a  hole  in  a  blank  key  and  fixing  the  control 
circuit.
3 knobs are included in 3 different colours: white, silver, anthracite.
If there is enough room, the transformer can be put inside the wall / flush-
mounted box (where the control circuit is).

CONNECTIONS

WARNING: 

connections should be only made by qualified and experienced 

personnel having the technical know-how or sufficient specific instructions (to 
ensure that connections are made correctly) in order to prevent any electrical 
danger.
To  prevent  any  risk  of  electric  shock,  do  not  connect  volume  controls  / 
loudspeakers when the amplifier is switched on. Before turning the system on, 
check all connections and make sure there are no accidental short circuits.
The entire sound system shall be designed and installed in compliance with 
the current local laws and regulations regarding electrical systems.

Summary of Contents for AT40T

Page 1: ...the rules of sound AT40T User manual Manuale d uso CONSTANT VOLTAGE LINE VOLUME CONTROL WITH 40 W TRANSFORMER ATTENUATORE PER LINEA A TENSIONE COSTANTE CON TRASFORMATORE 40 W...

Page 2: ...da costituire un rischio di folgorazione per le persone non procedere mai all installazione o alla connessione dell attenuatore quando la linea diffusori in tensione 3 Assicurarsi che tutte le conness...

Page 3: ...onori pu provocare la perdita permanente dell udito Il livello di pressione acustica pericolosa per l udito varia sensibilmente da persona a persona e dipende dalla durata dell esposizione Per evitare...

Page 4: ...a corredo 3 manopole ciascuna di colore diverso bianco argento antracite Nel caso lo spazio sia sufficiente il trasformatore pu essere posizionato all interno della scatola elettrica dove presente il...

Page 5: ...l trasformatore 100V COM le cui uscite con tensioni intermedie sono connesse ai morsetti J1 1 2 J1 1 4 J2 1 8 J2 1 16 Il livello dell uscita OUT morsetti Jo e Jo selezionato tramite il commutatore a 6...

Page 6: ...zionato tramite il commutatore a 6 posizioni 5 off In caso di necessit il livello dell uscita forzatamente ripristinato al massimo saltando di fatto il commutatore tramite un comando esterno con tensi...

Page 7: ...zioni 5 off In caso di necessit all uscita forzatamente inviato il secondo segnale d ingresso 100V IN B per annunci tramite un comando esterno con tensione 24 V c c Entrambi i jumper JPA e JPB devono...

Page 8: ...ili 1 100 V 2 0 3 commutazione 0 funzionamento normale 100 V annunci Esempio nr 4 collegamento con linea a 3 fili un ingresso audio 100 V con 3 filo scambio 0 100 V 100 V 100 V 0 Vdc 0 100 V 0 100 V b...

Page 9: ...all interno della scatola A B C D E F Il primo 100 V ed il terzo filo commutazione 0 100 V sono collegati direttamente rispettivamente ai morsetti Ji Ji 0 comune ed al trasformatore 100 V COM le cui...

Page 10: ...ensioni commutatore 43 mm l 50 mm h 68 mm p senza manopola Peso commutatore ca 40 g Dimensioni trasformatore 43 mm l 38 mm h 32 mm p Peso trasformatore 200 g Inserire l albero del commutatore nel foro...

Page 11: ...ge i e 100 V to involve a risk of electrocution never install or connect this volume control when the line is alive 3 Make sure all connections have been made correctly verifying that the line voltage...

Page 12: ...cause permanent hearing loss The acoustic pressure level that leads to hearing loss is different from person to person and depends on the duration of exposure To prevent potentially dangerous exposur...

Page 13: ...T can be installed on whichever supporting frame for home office electrical systems by drilling a hole in a blank key and fixing the control circuit 3 knobs are included in 3 different colours white s...

Page 14: ...ormer 100V COM of which outputs having intermediate voltages are connected to the J1 1 2 J1 1 4 J2 1 8 J2 1 16 terminals The output level OUT Jo and Jo terminals is selected by means of the 6 position...

Page 15: ...e output level OUT Jo and Jo terminals is selected by means of the 6 position selector 5 off If necessary the output level can be forced to its maximum the selector is bypassed through a 24 V dc comma...

Page 16: ...elected by means of the 6 position selector 5 off If necessary the second audio input for paging can be routed to the output the selector is bypassed through a 24 V dc command Both jumpers JPA and JPB...

Page 17: ...as 3 wires 1 100 V 2 0 3 0 normal 100 V override commutation 100 V 100 V 0 Vdc 0 100 V 0 Example no 4 3 wire connection an audio input 100 V with 3rd wire 0 100 V exchange 100 V white 70 V brown 50 V...

Page 18: ...ed by means of the 6 position selector 5 off If necessary the output level can be forced to its maximum by commuting the 3rd wire voltage from 0 to 100 V by using an additional external relay JPA and...

Page 19: ...thout the knob Selector weight ca ca 40 g Transformer dimensions 43 mm w 38 mm h 32 mm d Transformer weight 200 g G H I After connecting all wires put the selector printed circuit and the transformer...

Page 20: ...74484 e mail rcfservice rcf it Salvo eventuali errori ed omissioni RCF S p A si riserva il diritto di apportare modifiche senza preavviso Except possible errors and omissions RCF S p A reserves the ri...

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