Bosch LBB 1925 Betriebsanleitung PDF herunterladen (Seite 7)

Bosch Security Systems | 2003-09 | 3922 988 99483en

Plena System Pre-amplifier | Installation and Operating Manual | en | 7

1 About the system pre-amplifier

Figure 1.1

Figure 1.2

The Plena System Pre-amplifier is a mono amplifier, which mixes a call-station signal with a background music

signal. You can adjust the volume and tone for both signals. The background music channel has 3 possible inputs

(CD, Tape and AUX) and a direct XLR output for 2-channel use. Internal relays control the audio routing to the

6 zones. The zone selection keys at the front determine to which zones the background music is send.

About the system pre-amplifier

ower

-6

ena Sy

stem P

-amp

ifier

Priority

JP101

Speech filter

M.C.U.

Call Station In Use

Aux

Trigger 1

Trigger 2

Selector

/Line

1mV

200mV

PC Audio In

Out

RS-485

Announcement

Tone Control

Music

Alarm/Timer/Chime

Master out

RS-232

P.S.

Tel/EMG

Headphone

S101

ON/OFF

VU LED

VOX

Tigger 2

Chime

Interface

Tigger 1

Alarm/Timer

Tone Tone

Alarm/Timer

Tone

Block Diagram LBB 1925/10

S302

S301

S303

Z2 Z4Z3 Z5 Z6

Z6Z5Z4Z3Z2Z1

Tone

87654312

312 45 768

312 4 5 768

LBB1941/00

201

VR101

VR1

JP102

Key switch

Front panel

Zone 1

RA1

RB1

Call 100V

Call 0V

BGM 100V

BGM 0V

CAll & BGM 0V

Zone 1,0V Out

Zone 1,100V Out

Zone 1 override

RB2

Zone 2 override

Zone 2,100V Out

Zone 2,0V Out

Zone 2

Key switch

Front panel

CAll & BGM 0V

RA2

RB3

Zone 3 override

Zone 3,100V Out

Zone 3,0V Out

Zone 3

Key switch

Front panel

CAll & BGM 0V

RA3

RB4

Zone 4 override

Zone 4,100V Out

Zone 4,0V Out

Zone 4

Key switch

Front panel

CAll & BGM 0V

RA4

RB5

Zone 5 override

Zone 5,100V Out

Zone 5,0V Out

Zone 5

Key switch

Front panel

CAll & BGM 0V

RA5

RB6

Zone 6 override

Zone 6,100V Out

Zone 6,0V Out

Zone 6

Key switch

Front panel

CAll & BGM 0V

RA6

Call active

24V DC OUT

24V DC IN

18V DC

1.5A

F101

0.5A

115V/230V

F102F101

0.5A 0.5A

24V DC

2-CH use1-CH use

24V DC

1 2 3 4 5 6 7 8 9 10 11 12 ... 29 30

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