rcf UP 4061 Manual De Uso Y De Instalación página 15

Connecting the "POWER OUTPUTS" terminals
WARNING : To prevent the risk of electric
shock, never touch the bare wires coming
from the output terminals of the power
ampli er when it is switched on.
When the connections have been made, insulate
the 50V, 70V, and 100V terminals of the power
ampli er using the special protective cover.
Figures 9, 10, 11, 12, 13 and 14 - pag. 44 and 45
show the possible connections of the "POWER
OUTPUTS" terminals for speakers. To access the 50V,
70V, and 100V constant voltage outputs, remove the
protective cover by unscrewing the two screws.
Constant impedance line
- The total impedance of the speakers connected
must correspond to that selected on the output
terminals of the power ampli er.
- The sum of the power values of the speakers
must not be less than the output power of the power
ampli er.
- The length of the connection cables must be
reduced to the minimum; in any case, the greater the
distance to be covered, the greater the cable cross-
section should be.
Constant voltage line
- Each speaker must be equipped with a line
transformer having an input voltage equal to that of
the line (25V, 50V, 70V, or 100V).
- The sum of the power values of the speakers
must not exceed the output power of the power
ampli er.
NOTE: The "4 Ω " output of the unit can also be
connected to loads having a greater impedence
(8 Ω , 16 Ω ); the output power is reduced as a
conseguence.
Protection against Overloads
and short circuits
The power amplifer is completely protected against
any incorrect connection of the speakers, as it
incorporates an e cient protection circuit which
interrupts operation and switches on the OVERLOAD
light on the front panel whenever any of the following
conditions occur:
Constant voltage outputs (25 - 50 - 70 - 100 V)
- the total power of the speakers is greater than
the power ampli er output power.
- short circuit between the power ampli er output
terminals.
- Input signal too high with output terminals
disconnected
Constant impedance output (4 ohms)
- the total impedance of the speakers is less than
2 Ohms.
- short circuit between the power ampli er output
terminals.
- input signal too high with output terminals
disconnected.
The power ampli er is also eqiupped with an
thermal protection circuit for the nal stages. When
the unit stops working suddenly, switch it o , let it
cool, and check the speaker output line to eliminate
any possible problems. If the unit does not return to
normal operation after this check, contact your
RCF S.p.A. SERVICE CENTRE.
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