Bosch 1903-10, 1906-10, 1914-10, 1912-10 User Manual

Plena Mixer Amplifier

Installation and Operating Manual

LB B 19 03/10, LB B 190 6/10 ,

en

LB B 1912/10 , L BB 1914/10

Plena Mixer Amplifier | Installation and Operating Manual | Important safeguards en | 3

Important safeguards

1 Read instructions - All the safety instructions for use

should be read before the system is operated.

2 Retain instructions - The safety instructions and

instructions for use should be retained for future reference.

3 Heed warnings - All warnings on the unit and in the

operating instructions should be adhered to.

4 Follow instructions - All operating instructions and

instructions for use should be followed.

5 Cleaning - Unplug system units from the mains outlet

before cleaning. Do not use liquid cleaners or aerosol cleaners. Use a damp cloth for cleaning.

6 Attachments - Do not use attachments not

recommended by the product manufacturer as they may cause hazards.

7 Water and Moisture - Do not use this unit near water, for

example near a bathtub, washbowl, kitchen sink, or laundry basket, in a wet basement, near a swimming pool, in an unprotected outdoor installation or any area which is classified as a wet location.

8 Accessories - Do not place this unit on an unstable stand,

tripod, bracket or mount. This unit may fall, causing serious injury to a person and serious damage to the unit. Use only a stand, tripod, bracket or mount recommended by the manufacturer, or sold with the product. Any mounting of the unit should follow the manufacturer's instructions, and should use a mounting accessory recommended by the manufacturer. An appliance and cart combination should be moved with care. Quick stops, excessive force, and uneven surfaces may cause the appliance and cart combination to overturn.

9 Ventilation - Openings in the enclosure, if any, are

provided for ventilation and to ensure reliable operation of the unit and to protect it from overheating. These openings must not be blocked or covered. The unit should not be placed in a built-in installation unless proper ventilation is provided or the manufacturer's instructions have been adhered to.

10 Power sources - Units should be operated only from the

type of power source indicated on the marking label. If you are not sure of the type of power supply you plan to use, consult your appliance dealer or local power company. For units intended to operate from battery power, or other sources, refer to the "Installation and User Instructions".

11 Grounding or polarisation - This unit may be equipped

with a polarised alternating current line plug (a plug having one blade wider than the other). This plug will fit into the power outlet only one way. This is a safety feature. If you are unable to insert the plug fully into the outlet, try reversing the plug. If the plug still fails to fit, contact your electrician to replace your obsolete outlet. Do not defeat the safety purpose of the polarised plug. Alternatively, this unit may be equipped with a 3-wire grounding type plug having a third (grounding) pin. This plug will only fit into a grounding-type power outlet. This is a safety feature. If you are unable to insert the plug into the outlet, contact your electrician to replace your obsolete outlet. Do not defeat the safety purpose of the grounding-type lug.

12 Power-Cord Protection - Power supply cords should be

routed so that they are not likely to be walked on or pinched by items placed upon or against them, paying particular attention to cords and plugs, convenience receptacles, and the point where they exit from the appliance.

13 Overloading - Do not overload outlets and extension

cords as this can result in a risk of fire or electrical shock.

14 Object and Liquid Entry - Never push objects of any

kind into this unit through openings as they may touch dangerous voltage points or short-out parts that could result in a fire or electric shock. Never spill liquid of any kind on the unit.

15 Servicing - Do not attempt to service this unit yourself as

opening or removing covers may expose to dangerous voltage or other hazards. Refer all servicing to qualified service personnel.

16 Damage Requiring Service - Unplug the unit from the

outlet and refer servicing to qualified service personnel under the following conditions:

• When the power-supply cord or plug is damaged.

• If liquid has been spilled, or objects have fallen into the unit.

• If the unit has been exposed to rain or water.

• If the unit does not operate normally by following the instructions for use. Adjust only those controls that are covered by the instructions for use, as an improper adjustment of other controls may result in damage and will often require extensive work by a qualified technician to restore the units to their normal operation.

• If the unit has been dropped or the unit has been damaged.

• When the unit exhibits a distinct change in performance; this indicates a need for service.

17 Replacement Parts - When replacement parts are

required be sure the service technician has used replacement parts specified by the manufacturer or parts which have the same characteristics as the original part. Unauthorised substitutions may result in fire, electric shock or other hazards.

18 Safety Check - Upon completion of any service or

repairs to the units, ask the service technician to perform safety checks to determine that the unit is in proper operating condition.

19 Lightning - For added protection of the units during a

lightning storm, or when it is left unattended and unused for long periods of time, unplug it from the wall outlet and disconnect the cable system. This will prevent damage to the unit due to lightning and power-line surges.

Bosch Security Systems | 2003-09 | 3922 988 92883en

Plena Mixer Amplifier | Installation and Operating Manual | About this manual en | 4

About this manual

This manual provides all the information required to install and operate the unit.

Conventions

Warning

Follow these instructions to prevent personal injury.

Caution

Follow these instructions to prevent damage to the equipment.

Note

Read these instructions for tips and other useful information.

Safety precautions

Warning

Do not open the unit when it is connected to the mains. The unit contains non-insulated parts, which can cause electric shock.

Caution

There are no user-serviceable parts inside the unit. Service must be done by qualified personnel.

Bosch Security Systems | 2003-09 | 3922 988 92883en

Plena Mixer Amplifier | Installation and Operating Manual | Table of contents en | 5

1 About the mixer amplifier

JP406

LINE

LINE/MIC

/

MIC

Phantom Power

JP401

JP402

JP403

JP405

115V,230V

201

100V

INSInIN

S

Out

Click suppression

100V

70V

8Ohm

70V

100V

0

Call Active

0

JP902 100/70

0

Z2 Front

Call Active

JP802

0

Z1 Front

8Ohm

0

24V

8Ohm

JP901 100V

70V

0

24V

0

100V

0

70V

0

8Ohm

0

Call Only

0

Mix O nly

0

+

24V

-

Call Only

0

Zone 1 Call/Mix

0

Call/Mix

0

Zone 2 Call/Mix

0

Mix O nly

0

+

24V

-

Only for LBB1914/10

Figure 1.1

The Plena Mixer Amplifier is a mono amplifier for mixing up to 4 microphone signals and (background) music signals. You can adjust the volume of each input separately in order to obtain the correct mix and control the mixed output via the master volume and tone controls. Microphone input 1 can have priority with an optional chime signal, muting other sources. The power amplifier has a direct output for mixed signals and priority announcements, but additionally a priority controlled output relay routes the output to loudspeaker zones that should receive only priority announcements or no priority announcements at all.

Bosch Security Systems | 2003-09 | 3922 988 92883en

Plena Mixer Amplifier | Installation and Operating Manual | en | 8

About the mixer amplifier

1.1 Controls and connections (front)

2

Plena Mixer Amplifier

0dB

-6 dB

-20 dB

Power

1

3

1

3

5 6 7 10 11 12 13

4 8 9

2

4

Select

CD AUX

Line

Figure 1.2

1 Power button 2 VU-meter (LED's for -20, -6, 0 dB and Power ON) 3 Input 1 (microphone) volume control 4 Input 2 (microphone) volume control 5 Input 3 (microphone) volume control 6 Input 4 (microphone) volume control 7 Line (music source) volume control

Only for LBB1914/10

Master Zone 1 Zone 2

8 Music source selector (CD, tape, AUX) 9 Master tone control (treble) 10 Master tone control (bass) 11 Master volume control (all inputs except emergency) 12 Zone 1 selection button (LBB1914/10 only) 13 Zone 2 selection button (LBB1914/10 only)

Bosch Security Systems | 2003-09 | 3922 988 92883en

Plena Mixer Amplifier | Installation and Operating Manual | en | 9

About the mixer amplifier

1.2 Controls and connections (rear)

7

Chime

12

8 9 10 11 12 13 14 19

Tel/Emer.

0

2

45

1

L

R

CD Aux Line Out 1V

++GND

3

31

2

2 3 4

GND

1

231

Mic/Line Mic/Line

0

Out

In

Inc

4 43 5 5 4 5 15

Figure 1.3

1 Chime ON/OFF switch 2 Priority microphone input (5-pole DIN/balanced

with Phantom power)

3 Input 1 microphone input (6.3 mm phono jack/

balanced with Phantom power)

4 Microphone input (XLR/balanced with Phantom

power in microphone mode) 5 Microphone input (6.3 mm phono jack/balanced) 6 Input Mic./Line switch 7 Emergency connection input terminals 8 Emergency volume pre-set 9 CD input (2x phono connectors) 10 Tape input (2x phono connectors) 11 Auxiliary input (2x phono connectors)

230V115V

Call/Mix

100V 0 70V 0 100/70V 0 100/70 V 080

Zone1 Zone 2

Call/Mix

100/70V/8 0 100/70V 0 100/70V 0 100/70V 0 100/70V 0

Only for LB B 1914 /10

CallOnly Mix Only

24VDCIn

15

24VDCIn

16 186 6

17

12 Line output (XLR) 13 Tape output (2x phono connectors) 14 Insertion input/output (2x phono connectors) 15 Loudspeaker output terminals and 24 Vdc power

supply terminals 16 Mains connector (3-pole) 17 Earth connection screw 18 Mains fuse

LBB1903 T1A (230 Vac) / T2A (115 Vac)

LBB1906 T1.6A (230 Vac) / T3.15A (115 Vac)

LBB1912 T2.5A (230 Vac) / T5A (115 Vac)

LBB1914 T2.5A (230 Vac) / T5A (115 Vac) 19 Mains voltage 115/230 V switch

Bosch Security Systems | 2003-09 | 3922 988 92883en

Plena Mixer Amplifier | Installation and Operating Manual | en | 10

Internal settings

2 Internal settings

123 123

Figure 2.1

123 123

70V/100V

LBB1914/10

70V

100 V

JP802

LBB1903/10 LBB1906/10 LB B1912/10

8Ohm

JP902

Mic. 3

Mic. 4

70V

100V

JP802

Mic.3

JP402

Mic.4

JP405

JP902

Mic.4

JP405

JP401

VOX

JP403

Mic.3

JP403

JP406

Mic.2

Mic.1

VR401

Mic. 4

JP402

JP401

VOX

JP406

Mic.2

Mic.1

VR401

JP901

JP403

JP405

123 123

OFF

Mic. 3

JP403

JP405

123 123

OFF

JP402

JP401

VOX

JP406

Mic. 2

Mic. 1

ON

JP402

JP401

VOX

JP406

Mic. 2

Mic. 1

ON

123 123

100 V

70V

JP901

Figure 2.2

2.1 Setting the VOX for microphone input 1

Input 1 has the option of a voice-controlled priority (VOX), which will overrule all other inputs when it recognizes a voice signal. To activate this function, set the VOX-jumper (JP406) to ON.

2.2 Setting the speech filters

The speech intelligibility can be improved by cutting off the lower frequencies of the signal. To activate this filter for each microphone input, set the respective filter jumper (JP401 for input 1, JP402 for input 2, JP403 for input 3 and JP405 for input 4) to ON.

Bosch Security Systems | 2003-09 | 3922 988 92883en

Plena Mixer Amplifier | Installation and Operating Manual | en | 11

Internal settings

2.3 Setting the chime volume

Adjusting the potentiometer VR401 changes the volume of the chime attention signal, preceding a priority call. Be careful not to adjust VR701; this is a power amplifier factory adjustment.

2.4 Setting the output voltage for LBB1903, LBB1906 and LBB1912

Direct outputs for 70 V, 100 V and low impedance (8 Ohm) loudspeakers are provided. Jumper JP802 sets the Call Only and Mix Only outputs to 70 V or 100 V output. These outputs are controlled by a priority relay. The Call Only output only provides priority announcements, while the Mix Only output just provides the mixed signals and switches off at priority calls.

2.5 Setting the output voltage for LBB1914

Jumper JP901 sets the Call/Mix, Zone 1, Zone 2, Call Only and Mix Only outputs to 70 V or 100 V output. Setting JP902 can also set the direct Call/Mix output to 8 Ohm for low impedance loudspeakers. The Call Only and Mix Only outputs are controlled by a priority relay. The Call Only output only provides priority announcements, while the Mix Only output just provides the mixed signals and switches off at priority calls. The zone selection buttons control the outputs of Zone 1 and 2, but priority announcements are always routed to these zones.

Bosch Security Systems | 2003-09 | 3922 988 92883en

Plena Mixer Amplifier | Installation and Operating Manual | en | 12

1

15V/ 23 0V

A

p

aratu

s

d

e

liv

e

r

e

d

con

ne

cted f

or

230

V

-

Ra

te

dinp

u

t

p

ower : 4

0

V

A

Thi

sapp

aratus m

u

s

t

W

arni

n

g

Call/Mi

x

24VD

C

In

C

al

l

Only

Mi

x

O

n

l

y

70

V0

10

0

/70

V

0

100

/70

V

0

80

Installation in rack

3 Installation in rack

T e l /

L

E m e r . 0

Plena

M

i

xe

r

Amp

lif

i

e

r

0

d

B

-6d

1

B

-

2

0d

B

P

o

w

e

r

1

3

-

12 VD C

2

Se

l

e

c

t

CD

A

U

4

+

X

L

i

n

e

F

+

- +

+

12 VD C

Figure 3.1

The mixer amplifier is delivered for tabletop use, but you can mount it in a 19" rack. If you mount the amplifier in a rack, you must:

• ensure that the unit does not exceed the overheating temperature (45 °C ambient).

• use the mounting brackets which can be ordered by Bosch (LBC 1901/00).

• remove the 4 feet from the bottom of the unit. Without the feet the unit is 2U high.

0 2

C h i m

e

Mas

t

e

r

LBB1903 (30W); F=F5A

LBB1906 (60W); F=F8A LBB1912 (120W); F=F15A LBB1914 (120W); F=F15A

R

C

D

O

u t

A

u x

1

L

- i n

- e

3

In

O

u t

4

1

V . 5

In

c M i c /L

i n e

M i c

/

L

i

1

n

e

2

3

1 1 5

V / 2

3 0 V

A

R

p

a

p

t

ar e d

a

t i

u np

s u

d

c

t

p

onn

el

o

i v

w

e

e e

red

ct r :

e 4

d 00

f o

C

r

V

a

2

A

ll

4

3

/

0

M

V

i

-

x 1 0 0

V0

7

C 0 V

a

l

O n

0

l

y

8

M

i x O

0

n l

y 1 0

2

0

4 / 7

V 0

D

C

V

I

0

n 1 0 0

/ 7 0 V

0

W

a r n i n g

T h

i s a p p

ar a t u

s m u

s t b e

ea r t h

e d

Bosch Security Systems | 2003-09 | 3922 988 92883en

Plena Mixer Amplifier | Installation and Operating Manual | en | 13

1

15V /2 30V

A

p

aratu

s

d

e

liv

e

red

con

ne

cte

d

f

or

230

V

-

Ra

te

dinp

u

t

p

owe

r:4

0

V

A

Thi

s

a

pp

aratus m

u

s

t

W

arni

n

g

Call/Mi

x

24VD

C

In

Cal

l

Only

Mi

x

O

n

l

y

70

V0

10

0

/70

V

0

100

/70

V

0

80

External settings and connections

4 External settings and connections

4.1 Connect the DC supply (battery)

T e l

/

L

Em

e

r .

0

R

0

C

2

D

O

u t

A

u x

L

i n e

In

O

u t

1

V

In

c

M

i c /L

i n

e

M

i c /

L i n

e

2

3

4

1 1

5 V

/ 2

3 0

V

A

R

p

a

p

t

ar

ed

a t

i

u

np

s

ut

d

c

p

onn

el

o

i v

w

e

ec

er

r ed

t

:

e

4

d

00

f o

C

r

V

a

2

A

l

3

l

/

0

M

V

i

-

x 1 00

V

0

7

C

0

V

a

l l O

n

0

l y

8

M

i x O

0

n l y

1

0

2

0

4

/

7

V

0

D

C

V

I

0

n 1 0 0

/ 7 0 V

0

Wa

r n i

n g

T h

i s a p

p ar

a t us

m

u

s t b

e e

a r t h

e d

-

12 V D C

C h

i m

e

1

-

3

4

.5

1

+

-

F

LBB1903 (30W); F=F5A

+

LBB1906 (60W); F=F8A LBB1912 (120W); F=F15A LBB1914 (120W); F=F15A

12 V D C

Figure 4.1

The mixer amplifier has a 24 Vdc input (terminal screw), which you can use to connect a back up power supply, e.g. batteries. You can earth the unit to increase the electrical stability of the system.

Caution

The connection cable must have an in-line fuse. Use the type of fuse as mentioned in the illustration.

4.2 Priority microphone

T el

/Emer.

L

0

R

0

C

2

D

C

hime

1

-

3

2

4

. 5

1

2

O

u

t

A

ux

Li

neOut 1V

In

c

Mic

/Li

n

e

Mi

c /

Li

n

e

3

4

Ca

ll / M

ix 1 00

V

07

0

V

0

8

115

V/2

30V

A

R

p

ated

par

a

t

i

u

nput

s

c

deli

po

onn

w

v

ec

er

e

r

ed

te

:40

d f

0V

or

A

2

30V

C

a l

0

10

0/70

-

lO

nl y

Mi

xO

nl

y

2

4 V D

V

C

0

I n

100/70V

0

Wa

rn

i n

g

T h

is

app

ar

atus

m

u

s t

b

eea

r

thed

Figure 4.2

Bosch Security Systems | 2003-09 | 3922 988 92883en

GND

180 5 - po le D I N6.3 mm phono jack

180 3-pole X LR

Plena Mixer Amplifier | Installation and Operating Manual | en | 14

External settings and connections

Microphone 1 input has a 5-pole DIN (for a 3 or 5-pole DIN microphone) and a 6.3-mm phone jack connector wired in parallel. Only when connecting a microphone with a priority contact on pin 4 and 5 of the 5-pole DIN connector (2), this input has priority over all inputs except the emergency input. This microphone input can be included with a voice controlled circuit (VOX) which will overrule all the other input signals. How to activate the VOX is described in §2.1.

Note

Only use one of the two connection possibilities of each microphone input.

4.3 Chime ON/OFF-switch

Te

l/

L

E

me

r .

0

R

0

C

2

1

D

C

h i

me

1

-

-3

4

. 5

1

2

O u

Au

t

x

L

in

e

I

O

n

u

t

1

V

I n

c

M

ic

/ L

i n

e

M

i c

/

L

i n

e

3

4

C

a

l l/ M

i

x 1 0

0 V

0

70V 0 1

8

1

5

V /

2

3

0

V

Ap

Rat

p

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i

u

n

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p

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ed

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l y

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V

0

V-

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i x

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nly

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V

DC

In

1 0

0

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W

a

rn

i

n

g

This

app

arat

u s

m

u

s

tbeea

r

t hed

Figure 4.3

Depending on the position of the chime ON/OFF-switch (1), switching on microphone 1 will activate the chime. The default chime volume is -8 dB (40 V), which will be sufficient in most applications. The volume can be altered using the potentiometer VR401 on the main PCB of the unit (see §2.3).

Note

Only when connecting a 5-pole DIN microphone to the 5-pole DIN connector of microphone input 1 the chime can be activated.

Bosch Security Systems | 2003-09 | 3922 988 92883en

Plena Mixer Amplifier | Installation and Operating Manual | en | 15

2

1

3

4

Mic/Line

M

ic/Li

ne

C

D

L

R

A

ux

L

ineOut 1V

In

c

O

u

t

In

T

el

/

Eme

r

.

0

2

C

h

i

m

e

4

.5

1-

-3

2

1

CD

L

R

A

Tel /

E

mer

.

0

02

Ch

ime

4

.5

1- -3

External settings and connections

4.4 Microphone inputs

6 6

T el /

L

E m er. 0

R

0

C

2

D

Ou

t

C h

i m

A u

e

x

1

L

i ne

-

3

In

O

u t

4

1

V . 5

In

c

M

i c / L

i

n

e

M

i c / L

i

1

n e

2

3

4

1

Figure 4.4

Dependent on the microphone choose between the XLR with Phantom power and the 6.3 mm phono jack connector. Use an extension cable (1) if necessary. When using input 3 or 4 to connect microphones, set the switches (6) to Mic. When using these inputs as line-inputs, set the switches (6) to Line. To cut-off the lower frequencies of the signal, activate the speechfilters on the PCB (see §2.2).

1

1 5

V /2

3 0

V

A

R

p

a

pa t e

r

d

a t

i

u

n

s

p

c

u

d

p

o

t

e

o

n

l i

w

n

v

e

c

r

e

te

:

d

4

d

0

f

0

o

C

V

r

a

A

2

l

3

/ M

0 V

i x

-

1

0 0 V0

7 0

C

V

a l l

On

0

l yMi

8

xOn

0

l

y 1 0

2

0

4

/

VD 7 0

V

C

0

I

n 1 0 0

/ 7 0

V 0

W

ar

n in

g

T

h i s

ap

p a r a

t u s

m u

s t b

e e

a rt h

e d

4.5 Emergency input

8

T

e l /E

L

m e

r .

0

R

0

C

2

D

O

u

C h ime

Figure 4.5

The emergency input is for emergency announcements/signals and obviously has the highest priority (all other inputs are overruled). The emergency volume -which cannot be affected by the master volume control (11) - can be set at 8, using a screwdriver. It can not be set to zero.

Caution

A connection to a telephone network must always be made via a telephone coupler that provides adequate isolation between the telephone network (PBX) and the Plena system. The telephone coupler must also meet all relevant requirements for this type of communication equipment as imposed by law and/or responsible

Bosch Security Systems | 2003-09 | 3922 988 92883en

telecommunication organisations in the country of use. Never try to make a direct connection between the telephone network and the mixer amplifier.

t

A u

x

1

L

-

in

-3

e

I

O

n

u

t

4

1

V . 5

I n

c

M

i c /

L i n

e

M i

c / L

i

1

n e

2

3

4

1

1 5 V/2

3 0

V

Ap R a

p t

a

e

r

d

atu i n

s p

co

u

d

p

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o

n

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e t e

d

4

d

0

f

0

o

C

V

r

a

A

2

l

3

/ M

0

V

i x

-

1 0 0 V0

7 0

C

V

a l l

O

01

n l

yM

8

i xOn

0

l y

00

2

4V / 7

DC

0

V 0

I

n 10 0

/ 7 0

V 0

W

a r

n i n g

T

h i s

a p p a

r a tu s

m u

s t b

e

ea rt h

ed

Plena Mixer Amplifier | Installation and Operating Manual | en | 16

2

1

3

4

M

ic/L

in

M

i

c/Li

ne

C

D

R

A

u

x

L

i

n

eOut

1

V

I

n

c

Te

l

/

E

m

e

r

.

0

2

C

h

im

e

4. 5

1

-

-3

2

1

3

4

M

ic/Li

n

M

i

c/L

i

ne

CD

L

R

L

ine O

ut 1V

Inc

Te

l/

E

m

e

r.

0

2

Chime

4

.5

1

-

-3

External settings and connections

4.6 Music source inputs

10

CD

13

T

e l

/Em

L

e r .

0

R

0

C

2

D

O u

C h

i m e

1

-

3

4

.

5

1

t

A u

x

L

i n

e

I

O

n

u

t 1 V

I

nc

M

i c /

L i n

e

M

i c

/ L i n

e

2

3

4

1 1

5 V /

2 3

0 V

A

R

p

a

p

t

a

e

r

d

a t

i

u

n

s

p

c

u

d

p

o

t

e

owe

n

l i

n

v

e

c

r

e

te

:

d

4

d

0

f

0

o

Ca

V

r

A

2

l

3

/ M

0 V

i x

1

00

-

V0

7

C

0 V0

a

l l O

n l y

8

M

i x

O n

0

l

y 1 0

24 0 /

VD

7 0 V

C

0

I

n 1 0 0 /

7 0

V 0

W a

r n i

n g

T h i sa

p

p a r a

t u

sm

u s t

b e

e a r

t h

e d

RECORD

PLAYBACK

LBB1961

P L

E N

A

B

G

M

s o

u

r c

e

P o w

e r

R e p

e a t

P r o

g r a m

F o

ld e r

CD

/

M

P 3

F M

/ A

M M 1

/ 6

M 2

/ 7

M

3 / 8

M

S

4

c

/ 9

a

n

M 5

/ 1 0

P r o

g

r

a

m

TUNE R

TAP

E

Figure 4.6

When using a CD player, tape recorder or tuner for background music, connect the line-out connectors of the music source to the appropriate line-in connectors of the mixer amplifier (e.g. the tape recorder must be connected to the tape source input (10)). When using a tape recorder to record the output of the amplifier, connect the line-in connectors of the tape recorder to the line-out connector (13) of the mixer amplifier.

4.7 Connecting the line output

12

Tel

/

L

E

mer

.

0

R

0

CD

2

C

hi

me

1

4

Figure 4.7

The line output (12) is an output for connecting additional PA amplifiers (such as the Plena Booster Amplifiers).

Bosch Security Systems | 2003-09 | 3922 988 92883en

Ou

t

A ux

L

i n

e

3

I

Out1

n

V . 5

I n

c

Mi

c / Line

M

ic /

L i

1

ne

2

3

4

1 15

V/

2 3

0 V

A

R

p

a

p

t

a

e

r

d

a

tu i n

s

p

c

u

d

p

o

t

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owe

n

l i

n

v

e

ct

re

r:

e

d

4

d

0

f

0

o

C

V

r

a

A

2

l l

3

/

Mi

0

V

x

-

1 0

0 V

0

7

0

Ca

V

l l O

0

n

l y

8

M

i x O

n

0

l

y 1 0

24 0 /

V

7

DC 0 V

0

I

n 1 0 0

/ 7 0 V

0

W a

r n i

n g

Th i

s a p

pa r

a t us

m

us t be

e a

r th

e d

P

le

naBo

o

s

t

e

r

Am

p

l

if

ie

0

d

r

B

6

d

B

2 0

d

B

P

o we

r

Plena Mixer Amplifier | Installation and Operating Manual | en | 17

External settings and connections

4.8 Connecting loudspeakers

LBB1903/10 LBB1906/10 LB B1912 /10

Call Only MixOnly

Call/Mix

100/70V

100V070V

0

100/70V

08

0

Call/Mix direct out 8 Ohm

LB B1914 /10

Zone1 Zone 2

Call/Mix

100/70V/8 0 100/70V 0 100/70V 0 100/70V0 100/70V0

Call Only Mi xOnly

8 Ohm

4Ohm

8Ohm

24VDCIn

0

8Ohm

24VDCIn

100V

LBB1903/10 LBB1906/10 LBB1912/10

JP901 100V

100V

70V

8Ohm

0

70V

100V

8Ohm

0

Call Active

0

JP902 100/70

70V JP802

Z1 Front

8Ohm

T

e l

/

L

E me

r .

0

R

0

C

2

D

O

u t

C h

i m

A u

e

x

1

L

--

i n

e

3

I

O

n u t

4

1

V . 5

I n

c

M

i c

/ L i n

e

M i

c / L

i

1

n e

100V

0

2

3

4

1 1

5 V

/ 2 3

0 V

Ap

R

a

p

t

a

e

r

d

a t

i

u

n

s

p

c

ut

d

p

o

e

o

n

l i

w

n

v

e

c

re

r

t

:

e

d

4

d

0

f

0V

o

C

r

a

A

2

ll/

3 0

M

V

i

-

x

10

0 V

0

7

C 0 V

al

l O

0

n l y

8

M ix

O

0

n

l

y 1 0

2 0

4 V

/

70

D

V

C

I

0

n 1 0

0 /7

0

V 0

W a

r n i

ng

T h i

s a p

p a r

a t u

s m

u s t b

e e

a r th

e d

70V

0

8Ohm

100V070V

Call/Mix

0

Call Only MixOnly

100/70V

08

24VDCIn

100/70V

0

Call Only

0

Mix O nly

0

24V

+

24V

-

Call/Mix direct out

100V

Call/Mix

direct out

70V

Call Only 100/ 70 V

Mix Only 100/ 70 V

Figure 4.9

0

Call Only

0

Te

l /

L

E

me

r .

0

R

Call Only MixOnly

0

C

2

D

O u

t

C h

i m

A u

e

x

1

L

-i n

e

3

I

O

n

u

t

4

1

V . 5

I n

c

M

i c

/ L

i n e

M

i c / L

i

1

n

e

2

3

4

1 1

5 V

/ 2 3

0

V

A

R

p

a

p

t

a

e

r

di

a

t u

np

s

c

ut

d

p

o

e

o

n

l

iv

w

n

e

c

re

r

t

C

:

e

d

a

4

d

ll/

0

f

0

o

M

V

r

ix

A

2 3

0 V

-

1 0

0 V

0

C a ll

7

0

O

V

n l y

0

Mi

x

8

O n

l y

2

0

4V

1

D

0

C / 7

I

n 0 V

01

0 0 /

7 0 V 0

W

ar ni

ng

Th

i s a

p p a

ra t u

s m

u s

t b e

e a r t

h e d

24VDCIn

Zone 1 Call/Mix

0

Zone1 Zone 2

Call/Mix

0

Call/Mix

100/70V/8 0 100/70V 0 100/70V 0 100/70V 0 100/70V 0

8 Ohm

4 Ohm

8 Ohm

Call/Mix direct out 8 Ohm

8 Ohm

Figure 4.8

LBB1914/10

0

Z2 Front

Call Active

Zone 2 Call/Mix

0

24V

Mix O nly

0

+

24V

-

Call/Mix direct out 100/ 70 V

Zone 1

100/ 70 V

Zone 2

100/ 70 V

Call Only 100/ 70 V

Mix Only 100/ 70 V

Figure 4.10

4.8.1 Constant voltage loudspeakers

The mixer amplifier can drive 100 V constant voltage loudspeakers at full power (100 V) or half power (70 V). Connect the loudspeakers in parallel and check the loudspeaker polarity for in-phase connection. The summed loudspeaker power should not exceed the rated amplifier power. Ensure that the jumper(s) for loudspeaker voltage selection is / are properly set (see §2.4).

You can use the Call Only output for 3-wire remote volume control override. In this case, ensure that the selected voltage for the Call Only output is the same as for the direct output or the zone outputs.

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Plena Mixer Amplifier | Installation and Operating Manual | en | 18

1

5V/230V

Appa

r

atus d

e

live

r

e

d

c

o

n

ne

c

te

d

fo

r2

30

V-

Ra

t

ed inp

u

t

p

o

we

r

:

4

00V

A

Thi

s

a

p

pa

ra

tus

m

us

tb

e

ea

r

thed

Wa

r

nin

g

I

GN

&

QUALIT

Y

S

H

O

L

LAND

2

4

VD

CI

n

Call

O

n

ly M

ix

Only

/

70V

0

1

00

/

70V

0

External settings and connections

4.8.2Low impedance loudspeakers

Connect low impedance loudspeakers to the 8 Ohm/0 terminals. This output can deliver the rated output power into an 8 Ohm load. Connect multiple loudspeakers in a series/parallel-arrangement to make the combined impedance 8 Ohm or higher. Check the loudspeaker polarity for in-phase connection. Ensure that the jumper(s) for loudspeaker voltage selection is / are properly set (see §2.5).

4.9 Mains connection

Tel

/

L

E

m e r

.

0

R

0

C

2

D

O

u

C hi

m

e

1-

3

4

.5

1

t

A u

x

Line

In

Ou

t 1V

I

nc

M

i c/

L i

n e

M

i c/

L i

n e

2

3

4

11

5 V

/23

0 V

A

R

p

a

p

t

a

e

ra

d

t

in

u s

p

c

u

d

p

o

t

e

o

n

li

w

n

v

e

c

re

r

t

:

e

d

4

d

0

f

0

o

C

V

r

a

A

2

l

3

/M

0

V

i

x 1 0

0V

07

-

0

Ca

V

l l O

0

n l

y

8

Mi

x O

n

0

l

y 1 00

2 4

/

V

70

D

V

C

0

I

n

100

/70

V

0

W

a

rn i

n g

Thi

s a p

p a r

a t u

s mu

s tb

e

e a

r t h

e d

Figure 4.11

Use the supplied mains cord to connect the system to the mains supply.

Note

If necessary set the switch 115/230 V to the required voltage using a sharp object, e.g. a small screwdriver.

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Plena Mixer Amplifier | Installation and Operating Manual | en | 19

Operation of mixer amplifier

5 Operation of mixer amplifier

2

Plena Mixer Amplifier

0dB

-6 dB

-20 dB

Power

3

1

3

4 8 9

2

4

Select

CD AUX

Line

Only for LBB1914/10

Master Zone 1 Zone 2

Figure 4.6

Use the supplied mains cord to connect the system to the mains supply.

1

5 6 7 10 11 12 13

Figure 5.1

5.1 Source selection

• Use the music source selector (8) to select one of the connected music sources.

• Use the input volume controls (3, 4, 5, 6 and 7) to balance the sound level of the microphone inputs and the background music.

5.2 Volume and tone control

• Use the master volume control (11) to control the volume of the music/microphone mix.

• The treble and bass tone controls (9 and 10) affect the microphones as well as the music.

5.3 Zone selection (LBB1914/10 only)

• Use the zone selection buttons (12 and 13) to route the music/microphone mix from the amplifier output to loudspeaker zone 1 and/or loudspeaker zone 2. Priority announcements, however, are always routed to both zones, irrespective of the position of the zone selection buttons.

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Plena Mixer Amplifier | Installation and Operating Manual | en | 20

Tec hn ic al da ta

6 Technical data

6.1 Electrical

Mains voltage 230/115 Vac, ±10%, 50/60 Hz Max mains power consumption

LBB1903/10 100 VA LBB1906/10 200 VA LBB1912/10, LBB1914/10 400 VA

Max mains inrush current

LBB1903/10 4.5 A/9 A (230/115 Vac) LBB1906/10 5 A/10 A (230/115 Vac)

LBB1912/10, LBB1914/10 8 A/16 A (230/115 Vac) Battery voltage 24 Vdc, +20%/-10% Max battery current

LBB1903/10 1.6 A LBB1906/10 3 A LBB1912/10, LBB1914/10 6 A

6.2 Performance

Frequency response 50 Hz - 20 kHz (+1/-3 dB @ -10 dB ref. rated output) Distortion < 1% @ rated output, 1 kHz Bass control -8/+8 dB @ 100 Hz Treble control -8/+8 dB @ 10 kHz

6.3 Inputs

Input 1 (5-pin DIN, balanced with phantom power, 6.3 mm phone jack) Input 2 (3-pin XLR, balanced with phantom power, 6.3 mm phone jack)

Sensitivity 1 mV Impedance > 1 kOhm S/N (flat at max volume) 63 dB S/N (flat at min volume/muted) > 75 dB CMRR > 40 dB (50 Hz - 20 kHz) Headroom > 25 dB Speech filter -3 dB @ 315 Hz, high-pass, 6 dB/oct Phantom power supply 16 V via 1.2 kOhm VOX (input 1 only) attack time 150 ms

release time 2 s

Input 3 and 4 (3-pin XLR, balanced with phantom power, 6.3 mm phone jack)

Sensitivity 1 mV (microphone), 200 mV (line) Impedance > 1 kOhm (microphone)

> 5 kOhm (line) S/N (flat at max volume) 63 dB (microphone), 70 dB (line) S/N (flat at min volume/muted) 75 dB CMRR > 40 dB (50 Hz - 20 kHz) Headroom > 25 dB Speech filter -3 dB @ 315 Hz, high-pass, 6 dB/oct Phantom power supply 16 V via 1.2 kOhm (microphone)

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Plena Mixer Amplifier | Installation and Operating Manual | en | 21

Music input (Cinch, stereo converted to mono)

Sensitivity 200 mV Impedance 22 kOhm S/N (flat at max volume) > 70 dB S/N (flat at min volume/muted) > 75 dB Headroom > 25 dB

Emergency / telephone (Screw, balanced)

Sensitivity 100 mV - 1 V adjustable Impedance > 10 kOhm VOX threshold 50 mV

attack time 150 ms

release time 2 s S/N (flat at max volume) > 65 dB

Interconnection (Cinch)

Nominal level 1 V Impedance > 10 kOhm

Tec hn ic al da ta

6.4 Outputs

Master output 1 (3-pin XLR, balanced)

Nominal level 1 V Impedance < 100 Ohm

Tape output (Cinch, 2x mono)

Nominal level 350 mV Impedance 1.5 kOhm

Interconnection (Cinch)

Nominal level 1 V Impedance < 100 Ohm

Loudspeaker outputs (Screw, floating)

Max/rated output power 70/100 V

LBB1903/10 45 W/30 W LBB1906/10 90 W/60 W LBB1912/10, LBB1914/10 180 W/120 W

8 Ohm output

LBB1903/10 16 V (30 W) LBB1906/10 22 V (60 W) LBB1912/10, LBB1914/10 31 V (120 W)

Output power @ 24 V battery operation -1 dB ref. rated power

6.5 Environmental conditions

Operating temperature range -10 to +45 °C Storage temperature range -40 to +70 °C Relative humidity < 95%

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Plena Mixer Amplifier | Installation and Operating Manual | en | 22

Tec hn ic al da ta

6.6 General

EMC emission acc. to EN 55103-1 EMC immunity acc. to EN 55103-2 Acoustic noise level of fan < 40 dB SPL @ 1 m (LBB1912/10 and LBB1914/10 only) Dimensions 100 x 430 x 270 mm (19” wide, 2U high) Weight

LBB1903/10 approx. 5 kg LBB1906/10 approx. 8.5 kg LBB1912/10, LBB1914/10 approx. 10.5 kg

19” mounting brackets LBC1901/00 (to be ordered separately)

Bosch Security Systems | 2003-09 | 3922 988 92883en

For more information visit

www.boschsecuritysystems.com

Data subject to change without notice

2003-09 | 3922 988 92883en

Bosch 1903-10, 1906-10, 1914-10, 1912-10 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

Important safeguards

About this manual

Safety precautions

Table of contents

1 About the mixer amplifier

1.1 Controls and connections (front)

1.2 Controls and connections (rear)

2 Internal settings

2.1 Setting the VOX for microphone input 1

2.2 Setting the speech filters

2.3 Setting the chime volume

2.4 Setting the output voltage for LBB1903, LBB1906 and LBB1912

2.5 Setting the output voltage for LBB1914

3 Installation in rack

4 External settings and connections

4.1 Connect the DC supply (battery)

4.2 Priority microphone

4.3 Chime ON/OFF-switch

4.4 Microphone inputs

4.5 Emergency input

4.6 Music source inputs

4.7 Connecting the line output

4.8 Connecting loudspeakers

4.8.1 Constant voltage loudspeakers

4.8.2Low impedance loudspeakers

4.9 Mains connection

5 Operation of mixer amplifier

5.1 Source selection

5.2 Volume and tone control

5.3 Zone selection (LBB1914/10 only)

6 Technical data

6.1 Electrical

6.2 Performance

6.3 Inputs

6.4 Outputs

6.5 Environmental conditions

6.6 General