Monacor PA -1240 Instruction Manual Download Page 12

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3 Applications and Accessories

This amplifier has especially been designed for
use in 100 V PA systems . 100 V outputs for up
to five PA zones are available whose volume can
be individually adjusted . Microphones or units
with line level can be connected via three inputs
whose priority can be individually adjusted . Two
further line inputs of lowest priority complement
the connection possibilities .

Accessories

Insertion modules for

the extension compartment (1)

PA-1120DMT digital message storage with timer

PA-1140RCD

radio / CD player

PA-1200C

timer

PA-1200RDSU AM / FM radio with audio player

PA desk microphones

especially designed for this amplifier

PA-4000PTT
(fig . 3)

A desk microphone may be con-

nected to the jack PA-4000PTT (43) .

PA-4300PTT
(fig . 4)

A desk microphone may be con-

nected to the jack PA-4300PTT (44) .

A maximum of three microphones

PA-4300PTT may be operated with

the amplifier .

PA-1120RC
(fig . 5)

Three zone paging microphones may

be connected; the microphone is

supplied with a connection module

which is inserted into the amplifier .

4 Setting up the Amplifier

The amplifier has been designed for installation
into a rack (482 mm /19”), however, it can also
be used as a table top unit . In any case, air must
be allowed to pass through all air vents to ensure
sufficient cooling of the power amplifier .

4.1 Rack installation

For rack installation, the amplifier requires 3 RS
(3 rack spaces = 133 mm) . To prevent the rack
from becoming top-heavy, insert the amplifier
into the lower section of the rack . The front plate
is not sufficient for fixing the amplifier safely;
additionally use lateral rails or a bottom plate to
secure the amplifier .

The hot air given at the sides of the amplifier

must be dissipated from the rack; otherwise heat
will accumulate in the rack which may not only
damage the amplifier but also other units in the
rack . In case of insufficient heat dissipation, insert
a ventilation unit into the rack above the amplifier
(p . ex . DPVEN-04) .

5 Adjusting the Chime Sound

and the Priority of the

Insertion Module

Prior to installing an insertion

into the com-

partment (1), adjust the two jumpers MS 1
(chime) and MS 2 (priority of the insertion), see
layout diagram page 48 . These are no longer
accessible when an insertion is installed .
1) Disconnect the amplifier from the mains and

from the emergency power supply .

2) Screw off the cover (1) for the insertion .
3) Adjust the

chime sound

with the jumper

MS 1:
position “4 Tone”: 4-tone chime

position “2 Tone”: 2-tone chime

4) Adjust the

priority for the insertion module

with the jumper MS 2:
position “SLAVE” (factory setting):

The signal of the insertion takes the lowest
priority .
position “PRI”:

The signal of the insertion takes 2

priority .

This adjustment must e . g . be selected for call-
ing up stored announcements from the digital
message storage PA-1120DMT via the zone
paging microphone PA-1120RC .
A survey of all possible priorities is given in
chapter 7 “Defining the Priority of the Input
Signals” .

5) If no insertion is installed, tightly fasten the

cover (1) using screws .

6 Connections

All connections should only be made by skilled
personnel . Always switch off the amplifier before
making any connection!

6.1 Speakers

Either

connect 100 V speakers for the five PA

zones to the screw terminals SPEAKER ZONES
ATT . OUTPUTS (26)

Attention!

Each of the five zone outputs may

be loaded by the speakers with 100 W RMS
as a maximum . However, the total load of all
zones must never exceed the following value:
PA-1120

120WRMS

PA-1240

240WRMS

connect a speaker group with a total imped-

ance of 4 Ω as a minimum to the screw terminals
LOW IMP 4 Ω (28) . The zone volume switches (5)
do not affect this output . Never use the 100 V
outputs (26) and the 4 Ω output (28) at the same
time; otherwise, the amplifier will be overloaded!

When connecting the speakers, always ob-

serve the correct polarity, i . e . connect the positive
contact of the speakers to the upper terminal .
The positive contact of the speaker cables is
always especially marked .

6.2 Microphones

Connect three microphones with an XLR or
6 .3 mm plug to the combined XLR / 6 .3 mm jacks
(39) of the inputs CH 1 to 3 .
1) When connecting a microphone, turn the

corresponding GAIN control (41) fully to the
right to position “-50” .

2) When using a phantom-powered microphone,

switch on the 17 V supply with the corre-
sponding button PHANTOM POWER (40) .

Caution!

Only actuate the switch with the

amplifier switched off (switching noise) . With
the button pressed, no microphone with un-
balanced output must be connected to the
corresponding input; the microphone may be
damaged .

3) If a microphone is to take priority over another

microphone, set the corresponding DIP switch
MIC PRIORITY (45) to position ON (also see
chapter 7) .

Notes:

1 . When the desk microphone PA-4000PTT (fig . 3) or

PA-4300PTT (fig . 4) is used, the input CH 1 must not
be used as this input is connected in parallel with the
input (43) for the PA-4000PTT and with the input (44)
for the PA-4300PTT .

2 . If a zone paging microphone PA-1120RC is connected,

the input CH 2 must not be used as this input is con-
nected in parallel with the input for the PA-1120RC
(via the corresponding connection module) .

6.3 Desk microphone PA-4000PTT or

PA-4300PTT

The desk microphones PA-4000PTT (fig . 3) and
PA-4300PTT (fig . 4) [separately available as acces-
sory components] have been especially designed
for this amplifier .
1) Use the RJ-45 jack PTT REMOTE (49) to con-

nect the microphone PA-4000PTT to the jack
PA-4000PTT (43) of the amplifier or use the
jack OUTPUT (56) to connect the microphone
PA-4300PTT to the jack PA-4300PTT (44) of
the amplifier .

2) It is possible to connect two additional micro-

phones of the model PA-4300PTT: Connect
the jack LINK (57) of the first microphone to
the jack OUTPUT (56) of the second micro-
phone . Proceed in the same way to connect
the third microphone to the second one .

3) Press the switch PHANTOM POWER (40) of

input CH 1 and turn the corresponding GAIN
control (41) fully to the right to the position
“−50” .

Notes:

1 . Channel CH 1 is now connected in parallel to the jacks

for the desk microphones and may therefore not be
used for any other input signals anymore .

2 . The total length of the microphone cable may not

exceed 1000 m .

6.4 Zone paging microphone

PA-1120RC

The zone paging microphone PA-1120RC (fig . 5)
available as a separate accessory has especially
been designed for this amplifier . Up to 3 zone
paging microphones may be connected . For
operation, the connection module supplied
with the microphone must be installed into the
amplifier first . Installation must be made by skilled
personnel only!

Note:

When using the zone paging microphone, the

input CH 2 must not be used for other input signals as
this input is connected in parallel with the input for the
zone paging microphone .

6.4.1 Installation of the connection module

1) Disconnect the mains plug from the mains

socket . If an emergency power supply is
connected, disconnect it from the terminals
24 V

⎓

(30) so that the amplifier is out of oper-

ation in any case . Unscrew the housing cover
of the amplifier and the cover plate (46) on
the rear side of the amplifier .

2) Connect the 3-pole line AS 903

of the con-

nection module to the jack CN 903