RCF MT 7308 Manuale utente
USER MANUAL
MANUALE D’USO
MT 7308 -DXT 7000EN SYSTEM
MT 7308 Universal Monitoring Unit
-SISTEMA DXT 7000EN
MT 7308 Unità di monitoraggio
universale.
TABLE OF CONTENTS
INDICE
ENGLISH
SAFETY AND OPERATING PRECAUTIONS
DESCRIPTION
REAR PANEL
FRONT PANEL LEDS
CONNECTION
SETTINGS
STARTUP
OPERATION
TROUBLESHOOTING
ITALIANO
AVVERTENZE PER LA SICUREZZA
DESCRIZIONE
PANNELLO POSTERIORE
LED SUL PANNELLO FRONTALE
COLLEGAMENTO
IMPOSTAZIONI
AVVIO DEL SISTEMA
FUNZIONAMENTO
RISOLUZIONE DEI PROBLEMI
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IMPORTANT NOTES
Before connecting and using this product, please read this instruction manual carefully
and keep it on hand for future reference.This manual is to be considered an integral part
of this product and must accompany it when changing ownership, as a reference for
correct installation and use as well as for the safety precautions.
RCF S.p.A. will not assume any responsibility for the incorrect installation and / or use of
this product.
WARNING: To prevent the risk of re or electric shock, never expose these products to
rain or humidity.
SAFETY AND OPERATING PRECAUTIONS
1. All the precautions, in particular the safety ones, must be read with special attention,
as they provide important information.
2. Make sure that no objects or liquids can get into this product, as this may cause a
short circuit.
This apparatus shall not be exposed to dripping or splashing.
No objects lled with liquid (such as vases) and no naked sources (such as lighted
candles) shall be placed on this apparatus.
3. Loudspeaker lines can have a sufciently high voltage (i.e. 100 V) to involve a risk of
electrocution: complete the installation and all connections before turning the system on.
The terminals marked with the symbol are HAZARDOUS LIVE and their
connection is to be made by an INSTRUCTED PERSON or the use of ready-made
cables is required.
4. Assure all connections have been made correctly.
5. Protect all cables from damage; make sure they are positioned in a way that they
cannot be stepped on or crushed by objects.
6. Never attempt to carry out any modications or repairs. Contact your authorized
service centre or qualied personnel when any product does not work properly.
7. Should any product emit a strange odour or even smoke, turn the system off
immediately.
8. Do not connect any equipment or accessories not foreseen.
9. RCF S.p.A. strongly recommends this product is only installed by professional qualied
installers (or specialised rms) who can ensure a correct installation and certify it
according to the regulations in force. The entire audio system shall comply with the
current standards and regulations regarding electrical systems.
10.Mechanical and electrical factors need to be considered when installing a
professional audio system (in addition to those which are strictly acoustic, such as
sound pressure, angles of coverage, frequency response, etc.).
IMPORTANT NOTES
SAFETY AND OPERATING PRECAUTIONS
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11.Hearing loss
Exposure to high sound levels can 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 exposure
to high levels of acoustic pressure, anyone who is exposed to these levels should
use adequate protection devices. When a transducer capable of producing high
sound levels is being used, it is therefore necessary to wear ear plugs or protective
earphones.
12.To prevent inductive effects from causing hum, noise and a bad system working,
loudspeaker lines should not be laid together with other electric cables (mains),
microphone or signal cables connected to amplier inputs.
13.All loudspeaker lines shall have wires with a suitable section (twisted, if possible, to
reduce inductive effects due to surrounding electro-magnetic elds) and a sufcient
electrical insulation.
Refer to local regulations since there may be additional requirements about cable
characteristics.
14.Do not use solvents, alcohol, benzene or other volatile substances for cleaning the
external parts of this product. Use a dry cloth.
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MU 7100EN (the main unit of the RCF DXT 7000EN system) has eight 80 W ampliers
inside.
In case of higher power is needed, it is possible to create ‘locked groups’ to get 160 W,
240 W or even 320 W outputs. Yet, ‘locked groups’ reduce the available channels.
The MT 7308 universal monitoring unit makes it possible to integrate external (constant
voltage) ampliers into the monitored DXT 7000EN voice evacuation system.
This is a big advantage, especially when a system has a lot of lines, each having a
considerable loudspeaker load.
It is possible to use any professional single / multichannel amplier equipped with a 0 ÷
6 dBu balanced audio input and 50/70/100 V constant voltage output(s).
One or two MT 7308 can be linked to each MU 7100EN main unit.
One unit can be used for up to eight external ampliers (and its loudspeaker line
monitoring).
Max. power for each external amplier: 500 W.
The eighth amplier can be set (through the dip-switch no.8) as spare that automatically
replaces a faulty one.
Its size is half 19” rack unit (9.5”), two
MT 7308 can be installed into 19” 1U
rack.
The MT 7308 can be set by using
the PC conguration software and
communicates with the host MU
7100EN via ‘local bus’, from which
receives the power supply voltage as
well.
External amplier audio inputs can be
linked to the MU 7100EN loudspeaker
outputs through dedicated attenuators
that reduce signal levels to 0 dBu.
An ‘end of line’ unit needs to be linked
to the end of each loudspeaker line to
get a proper line monitoring.
RCF S.p.A. thanks you for purchasing this product, which has been designed
to guarantee reliability and high performances.
DESCRIPTION
Figure 1: system block diagram, all channels used for ext. ampliers
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100 V / 70 V
LOUDSPEAKER LINES
MT 7308MU 7100EN
LOCAL BUS
EXTERNAL
AMPLIFIERS
ATTENUATORS
0 dB
0 dB
0 dB
0 dB
0 dB
0 dB
0 dB
0 dB
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Figure 2: hybrid solution, only 4 channels used for ext. ampliers
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100 V / 70 V
LOUDSPEAKER LINES
MT 7308
LT 7208EN
MU 7100EN
LOCAL BUS
EX. AMPL.
ATTENUATORS
0 dB
0 dB
0 dB
0 dB
Figure 3: hybrid solution with spare amplier
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100 V / 70 V
LOUDSPEAKER LINES
MT 7308
LINE 1
LINE 5
LINE 2
LINE 6
LINE 3
LINE 7
LINE 4
LINE 8
/SPARE
MU 7100EN
LOCAL BUS
EX. AMPL.
ATTENUATORS
0 dB
0 dB
0 dB
0 dB
LT 7208EN
SPARE
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Figure 4: hybrid solution with spare amplier and dual lines (A/B)
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100 V / 70 V
LOUDSPEAKER LINES
MT 7308
LINE 1
LINE 1
LINE 5
LINE 5
LINE 2
LINE 2
LINE 6
LINE 6
LINE 3
LINE 3
LINE 7
LINE 7
LINE 4
LINE 4
LINE 8
/SPARE
LINE 8
/SPARE
MU 7100EN
LOCAL BUS
EX. AMPL.
ATTENUATORS
0 dB
0 dB
0 dB
0 dB
LT 7208EN
SPARE
A
B
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MAIN FEATURES
-Universal amplier and loudspeaker line monitoring unit.
-It allows cost-effective hybrid systems, by using both MU 7100EN internal ampliers and
external single / multichannel ampliers.
-One or two MT 7308 can be linked to each MU 7100EN main unit.
-A single MT 7308 can monitor up to 8 external ampliers and loudspeaker lines.
-Adjustable accuracy: 5% change in impedance can be measured.
-Fault information sent via ‘Local Bus’ to MU 7100EN.
-It is powered by the ‘Local Bus’ (no external power supply is needed).
-External amplier max. power: 500 W (per each channel).
-Automatic changeover of a faulty amplier by the spare one (if foreseen).
REAR PANEL
1LINE 1 to LINE 8: 50 / 70 / 100 V loudspeaker line inputs / outputs.
Screw terminal pins for each of the 8 lines:
IN + Loudspeaker line input +
IN – Loudspeaker line input –
GGround
OUT + Loudspeaker line output +
OUT – Loudspeaker line output –
2ADDRESS DIP-switches
DIP 1 to 4: MT 7308 digital address setting.
Each unit has its own individual digital address that is set through the rst 4 DIP-
switches. Each digital address must be set before powering the system.
One or two MT 7308 can be linked to each MU 7100EN main unit.
Two or more devices (linked to the same bus) cannot have the same digital address.
OFF
ON
1 2 3 4 5 6 7 8
1
2 3 4
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Digital address setting through DIP-switches:
DIP 5: not used.
DIP 6: faulty line switch off-relays (OFF: disabled, ON: enabled).
DIP 7: not used.
DIP 8: automatic spare amplier insertion (OFF: disabled, ON: enabled).
ADDRESS DIP-SWITCHES ADDRESS DIP-SWITCHES
1 2 3 4 1 2 3 4
1ON OFF OFF OFF 9 ON OFF OFF ON
2 OFF ON OFF OFF 10 OFF ON OFF ON
3ON ON OFF OFF 11 ON ON OFF ON
4 OFF OFF ON OFF 12 OFF OFF ON ON
5ON OFF ON OFF 13 ON OFF ON ON
6 OFF ON ON OFF 14 OFF ON ON ON
7ON ON ON OFF 15 ON ON ON ON
8 OFF OFF OFF ON - - - - -
3DATA: ‘Local Bus’ input. Link this port to the MU 7100EN local bus.
4LINK: ‘Local Bus’ parallel output.
Indice
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