UP-67M4, UP-127M4,
UP-247M2, UP-487
Modular amplifiers. v 2.3
Modular
amplifiers
7
(4)
MAINS FUSE
It is located into the lower
box of the power supply
base. In the same box there
is a replacement fuse as well.
(5)
BATTERY
SUPPLY INPUT
This supply allows
the use of these
amplifiers in
security
installations,
connecting the
same to a 24 V.d.c.
battery.
The ON/OFF switch
doesn't cut the
supply from the
battery.
Each one of the
equipment power
units includes a 24
V.d.c. power
supply input (see
figure 4). The
connection positive
terminal is
common to the
different power
units.
ATTENTION:
In
installations where
the units are power
supplied by the
battery input, IT IS
NOT POSSIBLE to
use the PROGRAM
AUDIO BUS (DIP
switch nº 10) and
PRIORITY AUDIO BUS (DIP switch nº11) DIP switches to join the different channels audio signals. The
junction must be made by means of external connections as shown in figure 5. The DIP switches 1, 2, 3
& 4 (SHIELD – GND LINK) must be OFF, and the external connection must be as shown in figure 6: pin 2
must be disconnected.
(6)
GROUND CONTACT
In all P.A. installations, it is very important to have only a joining point between the signal ground and
the mains ground contact.
If the P.A. installation is made up of several equipments, they will probably have the frames joined either
by means of the ground terminal of the mains connection, or because they are mounted in a rack
cabinet.
If the grounds are also joined by the signal circuits, it is advisable to remove the jumper between the
ground and the frame of all equipments excepting one.
+24V.D.C. Power supply
positive terminal for
amplifiers 1, 2, 3 and 4
GND 2. Power supply
negative terminal for AMP. 2
GND 4. Power supply
negative terminal for AMP. 4
GND 1. Power supply
negative terminal for
AMP. 1
GND 3. Power supply
negative terminal for
AMP. 3
Figure 4
Figure 5
Figure 6
