rcf UP 4242 Manual De Uso E Instalación página 14

A CLOSER LOOK: To prevent inductive
phenomena from causing hum or
disturbance that may jeopardize efficient
amplifier operation, the connection cables that carry
the low level audio signals (e.g. 0 dB) should never
be run in the vicinity of:
1) equipment that produces strong magnetic fields
(e.g. large power transformers).
2) electrical energy conductors.
3) speaker supply lines.
AC power supply
WARNING: Before powering up the
amplifier, make sure that it has been set
to operate with the correct voltage.
Connect the unit to current outlets equipped with
an earth contact.
Always connect the power cable before switching
on the amplifier, and always disconnect the power
cable after switching it off.
For connection to the mains in alternating current,
use the power cable supplied with the unit,
connecting it first to the socket (19) on the amplifier
(Fig. 1, page 42).
DC power supply
WARNING: When the amplifier is
supplied in direct current, keep the
power cable connected in order to
maintain the earth connection.
VERY IMPORTANT: To prevent possible
malfunctions of the direct current power
source, do not supply the amplifier with
alternating and direct current simultaneously.
For the DC power supply, the terminals (10) are
used (Fig. 1, page 42), which must be connected to a
24 Vdc power source (e.g. battery) as shown in Figure
2 on page 42.
A CLOSER LOOK: The amplifier is not
supplied with a battery charging device;
thus we recommend that you make a
suitable device available.
All manuals and user guides at all-guides.com
Connecting "INPUT 1"
the terminal strip (18) (Fig. 1, page 42) or the XLR
socket (24). The possible connections of the plug to
insert into the XLR socket are shown in Figures 3 and
4 on page 43. The possible connections of the
terminal strip are shown in Figures 5 and 6 on pages
43 and 44. To activate the input, the "PRIORITY
COMMAND" terminals must be short-circuited
together, as described in the section "CONNECTING
THE PRIORITY COMMAND TERMINALS".
Connecting "INPUT 2"
the terminal strip (17) (Fig. 1, page 42) or the RCA
sockets (15). The possible connections of the
terminal strip are shown in Figures 5 and 6 on pages
43 and 44. The connection of each RCA plug to insert
into the input is shown in Figure 7 on page 44. One
plug is related to the right channel of the source and
the other is related to the left channel. Use the
control (16) (Fig. 1, page 42) to adjust the gain of
"INPUT 2".
Connecting the "PRIORITY COMMAND"
terminals
priority function described in the section "FRONT AND
REAR PANEL DEVICES". Connect an electrical control
element with normally open contact to the "PRIORITY
COMMAND" terminals (ref. 14 - Fig. 1, page 42) as
shown in Figure 8 on page 44. The short circuit
between the two terminals causes the exclusion of
"INPUT 2" and activates "INPUT 1" for the duration of
the connection. As an electrical control element, you
can use the auxiliary pushbutton present on certain microphone stands, or a normal pushbutton or switch
for electrical systems.
Connecting the "PROTECT. OUT" terminals
section "FRONT AND REAR PANEL DEVICES". Figure 9
on page 45 shows the existing connection between
the "PROTECT. OUT" terminals (ref. 13 - Fig. 1, page
42) and the contact of the auxiliary alarm relay inside
the unit. The terminals can also be used as desired
for controlling external devices.
Connecting the "OUTPUT" terminals
amplifier when it is in operation.
output terminals of the amplifier using the protective cover.
14
For the "INPUT 1" connection, you can use either
For the "INPUT 2" connection, you can use either
These terminals make it possible to enable the
The function of these terminals is described in the
WARNING: To prevent the risk of electric
shock, never touch the bare wires that
lead from the output terminals of the
Once the connections have been made, isolate the