Cloud Electronics CX261 User Manual
CX261 MP3/ZONE MIXER
Installation and User Guide
Contents
Safety Information ........................................ 4
Safety Notes Regarding Installation ....................... 4
Conformities ............................................................... 4
Safety Considerations and Information ................4
General Description ...................................... 5
Schematic Diagram ...................................... 5
Front Panel Description ............................... 6
Rear Panel Description ................................. 6
Music Inputs ................................................... 7
Sensitivity and Gain Control ...................................7
Music Source Select and Level ................................ 7
Remote Control of Music Source and Level .......7
Mono Operation ........................................................ 7
Music Equalisation ......................................................7
Music Limiter .............................................................. 8
Music Priority .............................................................8
Front panel MP3 input .................................. 8
General Specications ................................ 15
Location of Internal Jumpers and
Connectors. .................................................. 15
Factory Default Jumper Settings ...........................16
Notes ............................................................ 17
Microphone Inputs ........................................ 9
Connectivity ................................................................9
Microphone Level Controls.....................................9
Gain Control ...............................................................9
Microphone Equalisation .......................................... 9
Microphone Limiter ..................................................9
Microphone Access Input .........................................9
Microphone Priorities .............................................10
Microphone Over Music Priority ......................10
Mic 1 Over Mic 2 Priority ..................................10
Use of Mic 1 input with telephone system ........10
Main Outputs ............................................... 11
Connectivity ..............................................................11
Auxiliary/MOH Output ............................... 11
Source Selection.......................................................11
Music Mute (Fire Alarm Interface) ............ 12
Bose® Equalisation Modules ...................... 12
Installation Instructions ..........................................12
General Notes ............................................. 13
EMC Considerations ...............................................13
Earthing ......................................................................13
Ventilation ..................................................................13
Technical Specications .............................. 14
CX261 User Manual v1.3 3
Safety Information
Safety Notes Regarding Installation
• Do not expose the unit to water or moisture.
• Do not expose the unit to naked ames.
• Do not block or restrict any air vent.
• Do not operate the unit in ambient temperatures above
35 °C.
• Do not touch any part or terminal carrying the
hazardous live symbol ( ) while power is supplied to
the unit.
• Do not perform any internal adjustments unless you
are qualied to do so and fully understand the hazards
associated with mains-operated equipment.
• The unit has no user-serviceable parts. Refer servicing
to qualied service personnel.
• If the moulded plug is cut off the AC power lead for
any reason, the discarded plug is a potential hazard and
should be disposed of in a responsible manner.
Safety Considerations and Information
The unit must be earthed. Ensure that the mains power
supply provides an effective earth connection using a threewire termination.
Caution - High Voltages
Do not touch any part or terminal carrying the hazardous
live symbol ( ) while power is supplied to the unit.
Terminals to which the hazardous live symbol refers require
installation by a qualied person.
Caution - Mains Fuse
Replace the mains fuse only with the same type and rating as
marked on the rear panel.
The fuse body size is 20 mm x 5 mm.
Caution - Servicing
The unit contains no user-serviceable parts. Refer servicing
to qualied service personnel. Do not perform servicing
unless you are qualied to do so.
Disconnect the power cable from the unit before removing
the top panel and do not make any internal adjustments with
the unit powered on.
Conformities
This product conforms to the following European EMC
Standards:
BS EN 55103-1:1997
BS EN 55103-2:1997
This product has been tested for use in commercial and
light industrial environments. If the unit is used in controlled
EMC environments, the urban outdoors, heavy industrial
environments or close to railways, transmitters, overhead
power lines, etc., the performance of the unit may be
degraded.
The product conforms to the following European electrical
safety standard:
BS EN 60065:2002
The CX range was developed and manufactured with high
quality materials and components, which can be recycled
and/or reused.
Only reassemble the unit using bolts/screws identical to the
original parts.
CX261 User Manual v1.34
General Description
The Cloud CX261 is a 1U rack-mounting stereo audio mixer
intended for use in multi-use areas where simple control of
high-quality background music needs to be combined with a
exible range of paging options.
The CX261 mixes any one of six stereo line inputs with one
or two microphone inputs. Separate controls for music and
mic levels are provided, and music source selection and level
may be controlled remotely if wished. As well as the main
output, there is a transformer-isolated mono auxiliary output
which is suitable for providing a MOH (Music On Hold)
output to a telephone system.
Schematic Diagram
The mixer may be congured to operate with most paging
systems: either mic input may be activated by voice (VOX)
or short-to-ground access connections, MIC 1 may have
priority over MIC 2, one line input may have priority over
any other selected to facilitate connection of a digital sound
store or similar device.
A front-panel 3.5 mm jack input permits easy connection of
a portable MP3 player, laptop or similar, with independent
level control.
A switchable isolating transformer congures MIC 1 input
for direct connection to a telephone system, enabling paging
messages to originate from an extension.
Bose® EQ cards may be tted to either or both channels.
g.1: CX261 schematic diagram
CX261 User Manual v1.3 5
7
8
9
11
3
4
6
8
11
1
2
4
5
7
8
9
9
6
5
11
10
fig.2: CX261 Front panel
Front Panel Description
1
MUSIC SOURCE – selects one of Music inputs
L1 to L6
2
MUSIC LEVEL – adjusts level of selected Music input
LOCAL/REMOTE LED – indicates (green) when
remote source selection is enabled
MP3 IN – 3.5 mm stereo jack socket for connection
of non-permanent external source
5
MP3 GAIN – adjusts gain of the MP3 input
LINE 1/MP3 LED – indicates (green) when the MP3
input is enabled
MIC 2
-50 to -10dBu
MIC 1
/TEL INPUT
5
11223
6
GAIN
MIC LEDS
OFF=NO SIG
GREEN=SIG
_
RED= PEAK
M1
GAIN
MIC/TEL
TEL
-4
GAIN
(dB)
+20
+
3
R
LINE 1MP3
GAIN GAIN GAIN GAIN
GAIN GAIN
+12
-12
LINE 1LINE 3LINE 5LINE 2LINE 4LINE 6
RRR
RR
-12
-12
+12
LLLLLL
GAIN GAIN
-12+12
+12
-12
1
3
2
4
7
SIGNAL INDICATOR – 3 LEDs (green/yellow/red)
indicating level of MP3 input
MIC 1 LEVEL – adjusts level of Mic input 1
MIC 2 LEVEL – adjusts level of Mic input 2
MUSIC MUTE – indicates (red) when external Music
10
Mute is active
POWER – Power LED
15 16
14
7
0
HFLF
MICS
MUSIC
EQ
LEFT RIGHTMOH
0
HFLF
213
-12+12
+12
OUTPUTS
LOC/REM
RSL-60V M1 M2
_
LEVEL
+
MUTE CONTACTS
MOH
17
MADE IN PRC FOR
CLOUD LTD, UK
SHEFFIELD, S9 3HF
FUSE
RATING
T1A
POWER 40-60Hz 46.5mA
110-240
18
N123
±10%
1
5
8
9
10
4
2
fig.3: CX261 Rear panel
Rear Panel Description
LINE 1 to LINE 6 – stereo line inputs for music
sources
GAIN 1 to GAIN 6 – gain trims for each line input
3
LF & HF MUSIC EQ – low and high frequency EQ
adjustment for music channel
LINE 1/MP3 – replaces LINE1 RCA connectors with
front panel MP3 input
MIC 1 and MIC 2 – balanced mic inputs
6
GAIN 1 and GAIN 2 – gain trims for each mic input
LF & HF MIC EQ – low and high frequency EQ
adjustment for mic channel
MIC LEDs – bicolour LEDs to aid mic level
adjustment
MIC/TEL – recongures MIC 1 input for use with
telephone system
11
12 13
3
TEL GAIN – MIC 1 input gain adjustment in TEL mode
10
19
MAIN OUTPUTS – balanced L & R outputs
12
MOH OUTPUT – balanced auxiliary output for use
with MOH systems
13
MOH LEVEL – level control for MOH output
14
ACCESS – external paging control inputs for MIC 1
and MIC 2
15
REMOTE MUSIC CONTROL – for connection of
RL-1 or RSL-6 remote control panels
16
LOC/REM – disables front panel controls when
remote control is in use
17
MUSIC MUTE – Emergency control input for muting
music source
18
IEC mains input
19
Mains fuse
CX261 User Manual v1.36
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