51 Pa-2400Rc: Locking Message M6; Setup Options; 61 Rack Installation; Establishing Connections - Monacor PA-2400RC Bedienungsanleitung

figure 6 . The additional connections for
the module PA-1120DMT are shown in
figure 7 .
5.1 PA-2400RC:
Locking message M6
When the message storage module PA-
1120DMT is used together with the zone
paging microphones PA-2400RC, the repro-
duction of messages stored under M6 can
be locked for the zone paging microphones .
The storage location M6 is reserved for
an emergency announcement . The lock will
prevent any accidental reproduction of this
message via a zone paging microphone .
1) Disconnect the amplifier from the mains
and from the emergency power supply .
2) Remove the screws of the housing cover
and then remove the cover .
3) Rearrange the jumper MS601 "M6" on
the upper board (located at the rear, next
to the RJ-45 jacks) as required (
Position ON: reproduction enabled
Position OFF: reproduction disabled
4) Close the housing with the cover .
At the module PA-1120DMT, it is always pos-
sible to reproduce the message M6 .
EM TRIGGER
Message module
PA-1120DMT
MS601: Play M6
M6
ON OFF ON
OFF
MS601
➆
Enabling / Disabling the reproduction of M6

6 Setup Options

The amplifier is designed for installation into a
rack (482 mm / 19"), but may also be used as
a desktop unit . To ensure sufficient cooling,
air must be able to flow freely through all air
vents of the amplifier .
6.1 Rack installation
For rack installation, 3 RS are required (RS =
rack space = 44 .45 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 off by 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 . The clearance above and
below the amplifier should be 1 RS . In case
of insufficient heat dissipation, install a fan
unit into the rack .

7 Establishing Connections

Prior to connecting units or changing any
connections, disconnect the amplifier from
the power supply and switch off the units to
be connected .
7.1 Speakers
WARNING During operation, there is a
hazard of contact with dan-
gerous voltage of up to 100 V
at the speaker connections (18,
21, 22) .
Connections must be made by skilled per-
sonnel only . Prior to making any changes to
the connections, make sure that the amplifi-
er is disconnected from the mains and from
the emergency power supply .
Connect the 100 V speakers of the differ-
ent zones to the appropriate terminal pairs
OUTPUTS 1–10 (PA-2410Z) or OUTPUTS 1– 20
☞ fig . 7) .
(PA-2420Z) (18) . The terminal pairs can be
removed from the unit .
At the output of each zone, the RMS power
of the speakers must never exceed 30 W (PA-
2410Z) or 60 W (PA-2420Z) .
The 100 V speakers connected to the ter-
minal pair HIGH IMP will always be switched on,
regardless of the zones that have been select-
ed via the buttons ZONE SELECTORS (14) or
the rotary switches (16) .
The total RMS power of all 100 V speakers
connected to the amplifier must never exceed
240 W; otherwise, the amplifier may be dam-
aged ( ☞ fig . 8) .
OUTPUTS
− +
1 . . .
+
100 V
-
+
100 V
-
+
100 V
-
➇
Connection of the 100 V speakers
When connecting the speakers, make sure
that the speakers have the same polarity .

7.1.1 Output LOW IMP

A speaker or a speaker group with a total
impedance of at least 4 Ω can be connected
to the terminal pair of the output LOW IMP
(21), e . g . for testing purposes . This output
cannot be deactivated via zone selection and
may not be operated together with the 100 V
outputs (18, 22); otherwise, the amplifier may
be overloaded .
7.2 Mono audio sources,
microphones
XLR or 6 .3 mm plugs can be used to connect
monophonic signals from microphones or
audio sources with line level to the combined
XLR / 6 .3 mm jacks (29) of the inputs 1– 3 .
− + − +
10/20 HIGH
IMP
+ +
100 V 100 V
- -
+ +
100 V 100 V
- -
+ +
100 V 100 V
- -
≤ 240 W
The jacks are designed for balanced sig-
nals . Audio sources with unbalanced signals
can be connected via 2-pole 6 .3 mm plugs or
via an XLR plug where the contacts 1 and 3
are connected .
For microphones, turn the control GAIN
(30) for the input gain towards "MIC", using
a small screwdriver; for audio sources with
line level, turn the control towards "LINE" .
If required, readjust the setting during oper-
ation . (If the sound via this input is not loud
enough, turn the control clockwise; if the
sound is distorted, turn the control coun-
ter-clockwise .)
Important:
1 . When one or multiple desk microphones PA-
4300PTT are used, these microphones take up
the channel 1; in this case, do not connect any
microphone or any other audio source to the
XLR / 6 .3 mm jack 1 .
2 . When using one or multiple zone paging micro-
phones PA-2400RC, remember that their signals
will be combined with the signal of the input 2 .
The volume control (2) and the sound control (3)
of the channel 2 will apply to both signals .
Audio sources with unbalanced mono signals
that do not require any priority assignment
(e . g . background music) can be connected
to one of the RCA jacks (28) of the channel
4 or 5 ( ☞ chapter 7 .3) .

7.2.1 Phantom power supply

If an audio source (e . g . electret microphone)
requires phantom power supply, engage the
switch PHANTOM POWER (31) . The phantom
power (⎓15 V) will only be available at the
XLR contacts of the jack .
Caution:
1 . To prevent loud switching noise, use the switch
only when the amplifier has been switched off,
the outputs have been muted or the control
MASTER (11) has been set to "0" .
2 . When phantom power supply has been activated,
no audio source with unbalanced signal output
may be connected; otherwise, the audio source
may be damaged .

7.2.2 Defining priority

A higher priority level can be defined for
each of the inputs 1– 3: A signal at an input
of higher priority will then take precedence
and mute the signals of the inputs with lower
priority .
Use the switches MIC PRIORITY (36) to define
for each of the three inputs if the priority level
is to be increased (lower position ON) or not
(upper position) .
Refer to the table in figure 5, chapter 3 for the
priorities of these three inputs with regard to
the other inputs of the amplifier .

7.2.3 Paging input

The input PAGING (24) with a higher priority
level ( ☞ table in figure 5, chapter 3) pro-
vides another option for the connection of
a mono audio source with line level (e . g . a
microphone with pre-amplifier or the line level
output of a telephone system) . The plug-in
screw terminals are designed for balanced
signals .
15