Placing The Amplifier; Rack Installation; Connections; Speakers - Monacor PA-40120 Manual De Instrucciones

– Switching voltage for each of the 4 zones to
GB
control emergency priority relays in case of
emergency
– 1 monitor output to check the outputs and for
recording purposes
– 1 internal monitor speaker
– signal chime, to be activated via additional
momentary pushbuttons, e. g. to notify an
announcement; the type of chime (2-tone,
4-tone, siren) can be selected internally
– siren sound for alarming via additional switch
– 4 reserve amplifiers to be connected; in case
of failure of an output, the unit is automati-
cally switched to the corresponding reserve
amplifier (only if 100 / 70 V speakers are used)
– input for a 24 V emergency power supply unit
for operation in case of mains failure
Important announcements will become more
intelligible when the inputs take different priori-
ties. Then the signals of an input of lower priority
are automatically muted when an announce-
ment is made via an input of higher priority. The
priority structure is as follows:
Priority Input
1 (high) PA-4000FMP, PA-4000PTT, PAGING
2 PA-4000RC (PRIORITY = ON)
3 PA-4000RC (PRIORITY = OFF)
4 CH1, CH2, CH3
5 (low) CH4, CH5
⑥
Prioritisation of the inputs

4 Placing the Amplifier

The amplifier is provided for rack installation for
units with a width of 482 mm (19") but it can also
be used as a tabletop unit. In each case air must
be allowed to move freely through all vents so
that a sufficient cooling of the amplifier is
ensured.

4.1 Rack installation

For rack mounting two rack spaces = 89 mm are
required. To prevent the rack from becoming
top-heavy, the amplifier must be placed in the
lower area of the rack. The front panel alone is
not sufficient for a safe fixing. In addition, the unit
must be fixed at the rear side or be held via lat-
eral rails or a bottom plate.
Above and below the amplifier one rack
space each should be unoccupied. The air
heated and blown out laterally by the amplifier
must be able to dissipate from the rack. Other-
wise there will be a heat accumulation in the rack
which may not only damage the amplifier but
also other units in the rack.
If the heat dissipation is insufficient, a fan
unit must be inserted into the rack.

5 Connections

Prior to connecting units or changing existing
connections, disconnect the PA-40120 from the
voltage supply and switch off the units to be con-
nected.

5.1 Speakers

At each output of the amplifier connect either
100 V speakers to the terminals "100 V" and
"GND" (20) [fig. 3a] – the output of the amplifier
allows a load by the speakers of 120 W as a
maximum, otherwise it may be damaged
or a speaker or a speaker group with a total
impedance of 4 Ω to the terminals "4 Ω" and
"GND" (20). The figures 3b to 3d show different
12
ways to obtain the correct impedance.
However, there are still further possibilities.
When connecting the speakers, always pay
attention to the correct polarity (as shown in the
figures).
5.1.1 70 V speakers
If only 70 V speakers are available for an output,
the connection contact "100 V" can be switched
over to a rated voltage of 70 V as follows:
1) Remove the plug-in screw terminals for the
speaker connection (20) of the desired output
from the unit. The jumper for the voltage
selection is now accessible (
⑦
Jumper for the rated output voltage
2) Rearrange the jumper according to the de -
sired voltage:
70 V rated output voltage
100 V rated output voltage

5.2 Microphones

Microphones with an XLR or 6.3 mm plug may
be connected to the combined XLR / 6.3 mm
jacks (28) of the inputs CH 1 to CH 3:
1) Turn the control for the input amplification
GAIN (29) towards "MIC". If required, read-
just the adjustment during operation. (If an
announcement via this input is too low, turn
the control clockwise; if the announcement is
distorted, turn the control counter-clockwise.)
2) If a microphone requires phantom power,
press down the switch PHANTOM POWER
(27). The phantom voltage is only present at
the XLR contacts of the jack.
CAUTION!
1. Only actuate the switch with the unit
switched off or with the input muted
(switching noise).
2. With the phantom power (15 V ) switched
on, no unbalanced microphone must be
connected, as this microphone may be
damaged.

5.3 Audio sources with line level

1) Connect units with a mono output to the com-
bined XLR / 6.3 mm jacks (28) of the inputs
CH 1 to CH 3. Turn the control for the input
amplification GAIN (29) towards "LINE". If
required, readjust the adjustment during
operation. (If the signal via this input is too
low, turn the control clockwise; if the sound is
distorted, turn the control counter-clockwise.)
Disengage the switch PHANTOM POWER
(27) if the audio source does not explicitly
require phantom power (phantom voltage
only at the XLR contacts of the jack).
The jacks are designed for balanced sig-
nals. Audio sources with unbalanced signals
may be connected via 2-pole 6.3 mm plugs or
via an XLR plug with the contacts 1 and 3
connected. Of course they may also be con-
nected to one of the RCA jacks (24) of the
channels CH4 or CH5.
The input channels CH1 to CH3 have
medium priority, i. e. their input signals take
priority over the channels CH4 and CH5, but
they are interrupted by announcements via
the zone-paging microphones PA-4000RC,
the desk microphone PA-4000PTT or an
emergency microphone PA-4000FMP.
For input signals which require the highest
priority use the input PAGING (30) with plug-
in screw terminals (e. g. for a microphone
with preamplifier or the line level output of a
telephone system).
fig. 7).
2) Connect units with a stereo output (e. g. CD
player) to the RCA jacks (24) of the inputs
CH4 to CH5. Both stereo channels are mixed
to a mono signal in the amplifier.
These inputs take the lowest priority and
are automatically muted by a signal at a
higher-priority input (

5.4 Desk microphone PA-4000PTT

With this desk microphone (separate accessory)
announcements of highest priority can be made.
The PA zones where these announcements
should be heard are selected at the amplifier.
Connect the PA-4000PTT, e. g. with the sup-
plied cable, to the RJ45 jack PTT (32). The
length of the cable must not exceed 30 m.
5.5 Zone-paging microphone
PA-4000RC
With the zone-paging microphone (separate
accessory) announcements of high priority can
be made. In each case it is possible to select at
the PA-4000RC in which PA zone the announce-
ment is to be heard. Up to 32 PA-4000RC units
can be connected to a PA-40120.

5.5.1 Installing a connection module

It is necessary first to install the connection mod-
ule supplied with the PA-4000RC into the ampli-
fier. Figure 2 shows the amplifier with the mod-
ule installed. The connection module has two
RJ45 jacks (33) to which one PA-4000RC each
may be connected. To each zone-paging micro-
phone, a further microphone may again be con-
nected until 32 zone-paging microphones as a
maximum and the amplifier are connected with
each other.
1) Unscrew the two screws of the cover plate
(on the rear side of the amplifier on the very
right) und remove the plate.
2) If only the jack INPUT 1 of the two jacks (33)
is reserved, the jumper on the PCB of the
connection module must be placed to posi-
tion ON for a correct termination of the line. If
both jacks are used, the jumper must be
placed to position OFF (
⑧
Connection module for PA-4000RC
with jumper for the terminating resistor
3) Slide the module into the opening on the rear
side of the amplifier. Pay attention that the
connector on the module correctly fits into the
socket in the amplifier. Fix the module with
the two screws.
table chapter 3).
fig. 8).