MO 2000 Set
Instruction manual
20
+/- 15dB
0
0
40
OVERLOAD
LEVEL
GAIN
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Contents
Safety instructions..................................................................................................... 2
MO 2000 Set................................................................................................................ 4
Delivery includes .................................................................................................. 5
Product overview MO 2000 Set............................................................................... 6
Putting the system into operation ......................................................................... 7
Fitting the device feet ........................................................................................ 7
Setting up the device .......................................................................................... 7
Rack mounting ..................................................................................................... 7
Connecting the mains unit ................................................................................ 8
Connecting the amplifier ................................................................................... 8
Connecting the optical microphone ................................................................ 9
Switching the central unit on/off .................................................................... 9
Adjusting the sensitivity ................................................................................... 9
Overload indication ............................................................................................. 9
Care and maintenance.............................................................................................10
Accessories.................................................................................................................10
Specifications ............................................................................................................11
Connector assignment ......................................................................................12
Frequency response curve ...............................................................................12
Manufacturer Declarations.....................................................................................13
1
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Safety instructions
This instruction manual contains important safety information.
Read this instruction manual.
Keep this instruction manual in a safe place. Always include this instruction
manual when passing the system on to third parties.
Heed all warnings.
Follow all instructions.
WARNING: To reduce the risk of fire or electric shock, do not expose the device
and the mains unit to rain or moisture.
Disconnect the mains connector from the wall socket to completely discon-
nect the device from the mains during lightning storms or when unused for
long periods of time.
Use only the supplied mains unit.
Ensure that the mains unit is:
– always readily operable and easily accessible,
– properly plugged into the wall socket,
– only operated within the permissible temperature range (see “Specifi-
cations” on page 11)
– not covered or exposed to direct sunlight for longer periods of time in
order to prevent heat accumulation.
Use of the MO 2000 CU central unit
The MO 2000 CU central unit has been designed for use with the MO 2000 H
optical microphone.
OPTICAL MIC CENTRE UNIT
II (2) G [Ex op is T6 Gb] IIC
II (2) D [Ex op is Db]
TÜV 07 ATEX 553824
Rack mounting
When installing the device in a closed or multi-rack assembly, please consider
that, during operation, the ambient temperature within the rack may signi-
ficantly rise above room temperature. However, the ambient temperature
within the rack must not exceed the temperature limit specified in the speci-
fications.
When installing the device in a rack, take good care not to affect the ventila-
tion required for safe operation or provide additional ventilation.
Make sure the mechanical loading of the rack is even to avoid a hazardous
condition such as a severely unbalanced rack.
When installing the device in a closed or multi-rack assembly, please note
that intrinsically harmless leakage currents of the individual devices may
accumulate, thereby exceeding the allowable limit value. As a remedy,
ground the rack via an additional ground connection.
2
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Operation
This device must be operated only from the type of power supply indicated
on the type plate. Observe correct polarity!
Never push objects of any kind through openings of this device as they may
touch dangerous voltage points or short-out parts that could result in fire or
electric shock.
Ensure sufficient ventilation. Do not block any ventilation openings. Install in
accordance with the manufacturer’s instructions.
Do not install near any heat sources such as central heating radiators, electric
heaters, stoves, or other devices that produce heat (e.g. amplifiers). Keep the
device away from direct sunlight and similar sources of heat.
Only use attachments/accessories specified by Sennheiser.
Use the device in dry rooms only. Do not expose the device to dripping or
splashing and ensure that no objects filled with liquids, such as vases or
coffee cups, are placed on the device. Do not use the device near water or
liquids.
Should a spillage occur, unplug the device and have it checked by a techni-
cian.
Service
No user serviceable parts inside! Do not attempt to service devices yourself as
opening or removing covers may expose dangerous voltage or other hazards.
If devices are opened by customers in breach of this instruction, the warranty
becomes null and void.
Refer all servicing to qualified service personnel. Servicing is required if a
device has been damaged in any way, such as mains cable or plug damage,
liquid has been spilled, objects have fallen inside, the device has been
exposed to rain or moisture, does not operate properly or has been dropped.
Intended use of the device
“Intended use” means that the device should be used within the operating
conditions and limitations described in this instruction manual. “Improper
use” means using the device other than as described in this instruction
manual, or under operating conditions which differ from those described
herein.
3
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MO 2000 Set
The MO 2000 Set optical microphone system consists of the following main
components:
y MO 2000 H optical microphone
y MO 2000 CU central unit
The MO 2000 H optical microphone consists of an opto-acoustic microphone
head which is fitted with a fixed 3 m double fiber optic cable. The fiber optic
cable is connected to the MO 2000 CU central unit. Power is supplied via an
external wide voltage range power supply unit.
The MO 2000 H is an omni-directional microphone designed for picking up air-
borne sound. The components of the MO 2000 H microphone head (outside
dimensions: 1/2 inch) are made of plastic suitable for permanent stationary
use in areas where aggressive substances (gases, salts, moisture) or radia-
tion are present. All components of the MO 2000 H microphone head are
metal-free, including the fiber optic cable feed.
The main areas of application of the optical microphone are acoustic mea-
surement and communication tasks in industrial environments and EMC-sen-
sitive areas as well as medical magnetic resonance imaging and magneto-
encephalographic measurement (MEG). Other applications are to be found in
the field of non-detectable acoustic surveillance.
4
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Delivery includes
y 1 MO 2000 H optical microphone with 3 m fiber optic cable
y 1 MO 2000 CU central unit
y 1 mains unit with different country adapters
y 1 carrying case
y 1 instruction manual
Optical microphone
Fiber optic
cable
Mains unit
20
+/- 15dB
0
0
40
OVERLOAD
GAIN
LEVEL
MO 2000 CU
5
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Product overview MO 2000 Set
³
·
»
¿
20
0
+/- 15dB
0
40
OVERLOAD
LEVEL
GAIN
AF OUT
BAL/UNBAL
OPTICAL MIC
INPUT
DC IN
12V/150mA
LEV 6dBu MAX
´
²
¶
º
¾
µ
³ Gain switch (coarse adjustment)
· Level control (fine adjustment), with 0 dB mark
» OVERLOAD LED
¿ ON/OFF button
´ Cable grip for power supply DC cable
² DC socket for connection of power supply unit (DC IN)
¶ Audio output (AF OUT BAL), XLR-3M, balanced
º Audio output (AF OUT UNBAL), BNC socket, unbalanced
¾ Type plate
µ SC duplex optical connection for microphone
Ƹ
ƹ
ƻ
ƺ
¹
¸ Optical microphone
¹ SC duplex connector
Ƹ Mains unit
ƹ US adapter
ƺ UK adapter
ƻ EU adapter (preassembled)
6
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Putting the system into operation
Fitting the device feet
Risk of staining of furniture surfaces!
CAUTION!
Some furniture surfaces have been treated with varnish, polish
or synthetics which might cause stains when they come into
contact with other synthetics. Despite a thorough testing of
the synthetics used by us, we cannot rule out the possibility of
staining.
̈ Do not place the central unit on delicate furniture surfaces.
You can set up the device on an even surface or mount it into a 19” rack.
Note:
Do not fit the rubber feet when rack mounting the device.
Setting up the device
To ensure that the device cannot slip on the surface on which it is placed, fix
the supplied four self-adhesive soft rubber feet to the base of the device.
̈ Ensure that the base of the device is clean and free from grease before fit-
ting the rubber feet.
̈ Fix the rubber feet to the base of the device by peeling off the backing
paper and fitting them as shown.
Rack mounting
Danger of heat damage!
CAUTION!
CAUTION!
When installing the device in a closed or multi-rack assembly,
please consider that, during operation, the temperature within
the rack may rise significantly.
̈ Make sure not to affect the ventilation required for safe
operation or provide additional ventilation.
Danger of electric shock!
When installing the device in a closed or multi-rack assembly,
please note that intrinsically harmless leakage currents of the
individual devices may accumulate, thereby exceeding the
allowable limit value.
̈ Ground the rack via an additional ground connection.
For mounting two central units into a 19” rack, you require the GA 2 rack
adapter. The GA 2 rack adapter consists of:
y 1 blanking plate Ƽ
ƾ
y 2 rack mount “ears” ƽ
y 1 jointing plate ƾ
y 2 blanking plugs ꢀ for closing off unused BNC holes
y 12 recessed head screws M 3x6
y 2 recessed head screws M 6x10
ꢀ
7
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To mount two central units into a rack:
̈ Place the two central units side by side upside-down onto a flat surface.
ƽ
̈ Align the jointing plate ƾ over the holes in the bottom sides of the central
units.
̈ Secure the jointing plate ƾ to the central units using eight of the supplied
recessed head screws (M 3x6).
ƽ
̈ Hook the two rack mount “ears” ƽ to the front panels of the central units.
ƾ
̈ Secure the rack mount “ears” to the central units using two of the sup-
plied recessed head screws (M 3x6) respectively.
̈ Slide the central units into the 19” rack.
̈ Secure the rack mount “ears” to the rack.
To mount only one central unit into a rack:
̈ Hook the two rack mount “ears” ƽ to the front panel of the central unit.
Ƽ
ƽ
̈ Secure the rack mount “ears” to the central unit using two of the supplied
recessed head screws (M 3x6) respectively.
ƽ
ꢀ
̈ Secure the blanking plate Ƽ to one of the rack mount “ears” ƽ using two
of the supplied recessed head screws (M 6x10).
̈ If you are not front mounting the BNC output connector, insert the two
blanking plugs ꢀ into the holes of the blanking plate.
̈ Slide the central unit into the 19” rack.
̈ Secure the rack mount “ears” to the rack.
Connecting the mains unit
̈ Connect the supplied mains unit to the socket ꢁ (DC IN). Use the cable
grip ᕥ to secure the power supply DC cable.
AF OUT
BAL/UNBAL
̈ Connect the suitable adapter to the mains unit Ƹ.
DC IN
12V/150mA
LEV 6dBu MAX
̈ Connect the mains unit Ƹ to the mains.
The device switches on automatically.
´
²
Connecting the amplifier
The audio outputs are available as a balanced XLR-3M output ꢂ and an
unbalanced BNC output ᕨ, allowing you to simultaneously connect two
devices (amplifier, etc.). Both outputs deliver the same output voltage, are
short-circuit proof and decoupled from each other.
AF OUT
BAL/UNBAL
DC IN
12V/150mA
LEV 6dBu MAX
̈ Connect the amplifier/mixing console to the balanced XLR-3M output ꢂ
or the unbalanced BNC output ᕨ.
For details on balanced or unbalanced connection, see “Connector assign-
ment” on page 12.
¶
º
8
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Connecting the optical microphone
Risk of damage to fiber optic cable!
CAUTION!
Fiber optic cable must not be bent like conventional cable!
̈ When installing fiber optic cable, make sure not to bend it
beyond a bend radius of 50 mm.
̈ Before connecting the optical microphone, remove the protections caps
from the microphone connections 1 and 2 of the central unit. Keep the
protection caps in a safe place for reuse during transport or storage. They
protect the microphone connections against dirt.
OPTICAL MIC
INPUT
̈ Connect the duplex connector ¹ of the optical microphone to the micro-
phone connections 1 and 2 of the central unit. Please observe the
correct insertion direction of the connector. The duplex connector is
connected the correct way round when the label on the connector is facing
downwards as shown.
1 2
¹
Switching the central unit on/off
After connection to the mains, the device switches on automatically and the
ON button ᕤ lights up.
̈ Press the ON button ᕤ to switch the MO 2000 CU central unit on or off.
Note:
If the power supply is interrupted for several seconds (e.g. due to a power
failure), the device switches on automatically even if it was switched off
before.
Adjusting the sensitivity
With the microphone connected and both the gain switch ꢃ and the level
control ᕢ set to 0 dB, the specified sensitivity (mV/Pa) is obtained.
̈ Use the gain switch ꢃ to increase the output voltage level by 20 dB
20
0
+/- 15dB
0
40
(tenfold increase) or 40 dB (hundredfold increase).
OVERLOAD
̈ Use the level control ᕢ to steplessly adjust the output voltage level
LEVEL
GAIN
between –15 dB and +15 dB.
³
·
Overload indication
The OVERLOAD LED » indicates both positive and negative voltage peaks.
If the OVERLOAD LED » lights up:
̈ Use the gain control ꢃ and/or the level control ᕢ to reduce the output
20
+/- 15dB
0
40
0
voltage level so that the OVERLOAD LED » no longer lights up.
OVERLOAD
LEVEL
GAIN
³
·
»
9
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Care and maintenance
Liquids can damage the electronics of the MO 2000 CU central
unit!
CAUTION!
Liquids entering the housing of the device can cause a short-
circuit and damage the electronics.
̈ Keep all liquids far away from the device.
̈ Before cleaning, disconnect all devices from the mains.
To clean the MO 2000 CU central unit:
̈ Before cleaning, disconnect the device from the mains.
̈ Use a soft, dry cloth to clean the device.
Accessories
Cat.-No.
009823
525700
525701
067510
502186
511999
516503
Accessory
GA 2 rack adapter
MO 2000 H optical microphone
MO 2000 CU central unit
Mains unit
MZQ 2000 microphone clamp
Carrying case
Instruction manual
10
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Specifications
MO 2000 CU central unit
1
Housing
/2 19” metal housing
Front panel connections and
controls
ON/OFF button with operation indicator,
OVERLOAD LED,
gain control (coarse adjustment),
level control (fine adjustment), with
0 dB mark
Rear panel connections and
controls
DC socket for connection of mains unit,
SC duplex input for microphone,
XLR socket, balanced
BNC socket
Power supply
mains unit with country adapter
100-240 V AC to 12 V DC, 5.4 W
Power consumption of CU
Current consumption
Gain
1.5 W at 12 V DC
120 mA
steplessly adjustable between +/–15 dB,
three settings: 0 dB, +20 dB, +40 dB
AF output level
15 mV/Pa (level control set to central
position, gain switch set to 0 dB)
Output impedance
Max. output level
approx. 330 Ω unbalanced/660 Ω balanced
1.55 V
Operating temperature range 0 °C to +40 °C
Storage temperature range
–20 °C to +70 °C
MO 2000 H optical microphone
Design
MO 2000 H microphone head with
3 m fiber optic cable
Pick-up pattern
Frequency response
Sensitivity
omni-directional
20 Hz to 40 kHz (±6 dB)
15 mV/Pa
S/N ratio at 1 Pa SPL
Max. SPL
> 50 dB(A)
134 dB
Operating temperature range –10 °C to +70 °C
Storage temperature range –20 °C to +70 °C
11
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Connection : fiber optic cable – extension (optional)
Interface
Design
SC
multimode 200/230 μm
approx. 3–4 dB per 100 m
Cable loss
Optical transducer (optional)
Interface
socket/socket
type SC
Design
Coupling losses
5–6 dB per coupling pair
AF cable
Design
balanced microphone cable with shielding
Connector assignment
2
1
+
3
DC connector for mains unit
XLR-3F connector, balanced
Frequency response curve
dB
20
15
10
5
0
-5
-10
-15
-20
-25
-30
20
50
100
200
500
1k
2k
5k
10k
20k
50k Hz
12
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Manufacturer Declarations
Warranty
Sennheiser GmbH & Co. KG gives a warranty of 24 months on this product.
For the current warranty conditions, please visit our web site at
CE Declaration of Conformity
This equipment is in compliance with the essential requirements and other
relevant provisions of Directives 2004/108/EC and 2006/95/EC.
Statements regarding FCC and industry Canada
This device complies with Part 15 of the FCC Rules and with RSS-210 of
Industry Canada. Operation is subject to the following two conditions: (1) this
device may not cause harmful interference, and (2) this device must accept
any interference received, including interference that may cause undesired
operation.
Changes or modifications made to this equipment not expressly approved by
Sennheiser electronic Corp. may void the FCC authorization to operate this
equipment.
13
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14
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Sennheiser electronic GmbH & Co. KG
Am Labor 1
30900 Wedemark, Germany
Phone +49 (5130) 600 0
Fax +49 (5130) 600 300
Printed in Germany
Publ. 08/08
524194/A01
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