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 ,

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

Important safeguards..........................................................................................................................................................3

About this manual ..............................................................................................................................................................4

Safety precautions...............................................................................................................................................................4

Table of contents ................................................................................................................................................................5

1 About the mixer amplifier ................................................................................................................................................7

1.1 Controls and connections (front) .............................................................................................................................8

1.2 Controls and connections (rear) ..............................................................................................................................9

2 Internal settings ................................................................................................................................................................10

2.1 Setting the VOX for microphone input 1 ............................................................................................................10

2.2 Setting the speech filters .........................................................................................................................................10

2.3 Setting the chime volume ......................................................................................................................................11

2.4 Setting the output voltage for LBB1903, LBB1906 and LBB1912 ....................................................................11

2.5 Setting the output voltage for LBB1914 ...............................................................................................................11

3 Installation in rack ...........................................................................................................................................................12

4 External settings and connections .................................................................................................................................13

4.1 Connect the DC supply (battery) ..........................................................................................................................13

4.2 Priority microphone ...............................................................................................................................................13

4.3 Chime ON/OFF-switch .........................................................................................................................................14

4.4 Microphone inputs ..................................................................................................................................................15

4.5 Emergency input .....................................................................................................................................................15

4.6 Music source inputs ................................................................................................................................................16

4.7 Connecting the line output ....................................................................................................................................16

4.8 Connecting loudspeakers .......................................................................................................................................17

4.8.1 Constant voltage loudspeakers .........................................................................................................................17

4.8.2 Low impedance loudspeakers ..........................................................................................................................18

4.9 Mains connection ....................................................................................................................................................18

5 Operation of mixer amplifier .........................................................................................................................................19

5.1 Source selection .......................................................................................................................................................19

5.2 Volume and tone control .......................................................................................................................................19

5.3 Zone selection (LBB1914/10 only) .......................................................................................................................19

6 Technical data ..................................................................................................................................................................20

6.1 Electrical ..................................................................................................................................................................20

6.2 Performance ............................................................................................................................................................20

6.3 Inputs ........................................................................................................................................................................20

6.4 Outputs .....................................................................................................................................................................21

6.5 Environmental conditions ......................................................................................................................................21

6.6 General .....................................................................................................................................................................22

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

Plena Mixer Amplifier | Installation and Operating Manual | Table of Contents en | 6

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

Plena Mixer Amplifier | Installation and Operating Manual | en | 7

About the mixer amplifier

1 About the mixer amplifier

JP406

LINE

LINE/MIC

MIC

Phantom Power

JP401

JP402

JP403

JP405

115V,230V

201

100V

INSInIN

Out

Click suppression

100V

70V

8Ohm

70V

100V

Call Active

JP902 100/70

Z2 Front

Call Active

JP802

Z1 Front

8Ohm

24V

8Ohm

JP901 100V

70V

24V

100V

70V

8Ohm

Call Only

Mix O nly

24V

Call Only

Zone 1 Call/Mix

Call/Mix

Zone 2 Call/Mix

Mix O nly

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)

Plena Mixer Amplifier

0dB

-6 dB

-20 dB

Power

5 6 7 10 11 12 13

4 8 9

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

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