Monacor PA -1240 Instruction Manual Download Page 10

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Layout and connection plan 48
Block diagram 49

PA Mixing Amplifier for 5 Zones

These instructions are intended for installers of
PA systems (chapters 1 – 10) and for users without
any specific technical knowledge (chapters 1 – 3,
8) . Please read the instructions carefully prior to
operation and keep them for later reference .

All operating elements and connections de-

scribed can be found on the fold-out page 3 .

1 Overview

1.1 Front panel of amplifier

Cover of the insertion compartment;

a MONACOR insertion can be installed here,
e . g . tuner, CD player, digital message inser-
tion

TREBLE control for a unit inserted into the
compartmeπnt (1)

BASS control for a unit inserted into the com-
partment (1)

Buttons with LED indicator for activating the
individual PA zones Z 1 to Z 5

Zone attenuators for separate volume adjust-
ment of the individual zones

Button ALL CALL with LED indicator for
activating all zones at the same time and
for increasing the volume to the maximum
[independent of the buttons (4) and the zone
attenuators (5)]; the maximum volume is only
limited by the MASTER control (21)

LED indicators for the power amplifier [inde-
pendent of the zone attenuators (5)];

in case of overload, the red LED CLIP will light
up

Level controls for the inputs CH 1 to CH 3 (39)
Control CH 1 will also adjust the level for a
microphone connected to the jack (43) or
(44); control CH 2 will adjust the level for
zone paging microphones of type PA-1120RC
(connected via a separate module):

the priority of these inputs is adjusted with
the DIP switches (45)

Bass and treble controls for the inputs CH 1
to CH 3 (39)

Level controls for the line inputs CH 4 and
CH 5 (38)

Bass and treble controls for the inputs CH 4
and CH 5

Chime button; the chime will take 2

priority

(for switching over between 2-tone chime and
4-tone chime see chapter 5)

Volume control for the chime

Button TEL; if the button is pressed, it will
e . g . be possible to hear a telephone bell or
night bell via all speakers [connection via the
terminals NIGHT RINGER (29)]; the bell will
take the lowest priority

Volume control for a telephone signal fed in
via the terminals PAGING IN (32); this signal
will take 3

priority

Volume control for the telephone bell or night
bell (also see items 14 and 29)

Button for a wailing siren tone; the siren will
take 4

priority

Volume control for the siren

Button for a steady siren tone

Overheat indicator TEMP;

will light up when the temperature of the
heat sink has reached 100 °C . In this case, all
speaker outputs will be muted . In addition,
the red LED PROT (22) will light up .

MASTER control for the total volume

LED PROT; will light up when the protective
circuit is activated:

1 . for approx . 1 second after switching on

(switch-on delay)

2 . for approx . 1 second after switching off
3 . if the amplifier is overloaded
4 . if the amplifier is overheated

POWER LEDs:

DC will light up when the amplifier uses a

24 V emergency supply voltage in case
of mains failure

AC will light up when the amplifier uses the

mains voltage

POWER switch

STAND BY LED;

will light up when the amplifier is switched off

1.2 Rear panel of amplifier

Speaker terminals for 100 V speakers

Attention!

Each of the five zone outputs

allows a maximum load of 100 W RMS by
the speakers; however, the total load of
all zones must never exceed the following
value:
PA-1120

120 W RMS

PA-1240

240 W RMS

Jack for the mains cable supplied for connec-
tion to 230 V/ 50 Hz

4 Ω speaker output for a speaker group with
a total minimum impedance of 4 Ω

Attention!

Only use this output if the 100 V

outputs (26) are not used, otherwise you will
risk overload of the amplifier .

Input for the bell voltage (e . g . 8 V/ 50 Hz) of a
telephone bell or night bell; the bell voltage
will trigger an audio signal which can be heard
via the speakers (also see items 14 and 16)

Screw terminals for an emergency power
supply (

⎓

24 V)

Screw terminals for an external switch for
activation / deactivation by remote control
[in this case, the switch POWER (24) must
not be pressed]

Input (bal ., 250 mV) for a telephone signal to
be heard via the PA system (also see item 15)

Connection for a separate switch;

if a digital message insertion PA-1120DMT
is installed, this connection allows to call up
a stored alarm announcement . At the same
time, all PA zones will be activated and set
to maximum volume [like the button ALL
CALL (6)]

Cover plate; will be replaced by a connec-
tion plate if the insertion PA-1120DMT,
PA-1140RCD, PA-1200C or PA-1200RDSU is
installed

Input AMP IN; in connection with the output
PRE OUT (36) for inserting e . g . an equalizer .
If this jack is connected, only the signal fed in
here will be reproduced . The power amplifier
will be disconnected from the preamplifier .

Output PRE OUT; for connection of an addi-
tional amplifier (chapter 6 .7) or in connection
with the input AMP IN (35) for inserting e . g .
an equalizer;

the output volume is independent of the
MASTER control (21)

Output REC for connecting a recorder; the
output volume is independent of the MASTER
control (21)

Inputs CH 4 and CH 5 for units with line level
(e . g . CD player, cassette recorder, etc .); the
two stereo channels L and R will be mixed
internally to a mono signal

Balanced inputs CH 1 to CH 3 via XLR / 6 .3 mm
jacks (combined jacks);

the input sensitivity can be adjusted between
microphone level and line level (2 .5 – 250 mV)
with the controls GAIN (41)

Contents

1 Overview

. . . . . . . . . . . . . .

1 1 Front panel of amplifier

. . . . . . . . .

1 2 Rear panel of amplifier

. . . . . . . . . .

1 3 Desk microphone PA-4000PTT

(accessory)

1 4 Desk microphone PA-4300PTT