Bosch Appliances LBB 1965 manual Loopthrough audio connections, LBB1920

Plena Message Manager Installation and Operating Manual External settings and connections

en 14

The message manager can be used with all Plena amplifiers via the Cinch output (4) or the XLR Output (6). The level of the messages can be set via the message volume control (2).

To fully benefit from the features of the message manager in the overall Plena system (e.g. to distribute pre-recorded messages to pre-programmed zones) the unit must be connected via the system pre-amplifier LBB1925. To do this, use the RS232 cable and the audio cable supplied.

There are several ways to connect the message manager to the system pre-amplifier:

- Connecting the Cinch output (4) of the message manager to the Cinch PC Audio In (R) line input of the sys- tem pre-amplifier, as shown in figure 3.2 (in which the LBB1961 functions as a BGM source).

-Connecting the XLR output (6) of the message manager to the points 1 and 3 of the 8-pole DIN socket of the system pre-amplifier.

3.3 Loopthrough audio connections

LBB1920

Dir.Out1

Dir.Out2

Dir.Out3

Dir.Out4

Ins/ Casc / Emgln

Ins/ Casc Out

Master Line Out

Master Mic. Out

115V

230V

LBB 1920/00

Apparatus delivired

8900 192 00005

115/230V~,50/60Hz

connected for 230V-

Ins/Casc

No.

1-

3

Rated input

power: 25VA

+

GND

GND

+

4

5

Warning

T0,5AL250V

1-

3

3

1

1-

2

- 1

1

-

2

1-

3

1-

3

This apparatus must be earthed

5

2

4

3

3

3

4

5

4

5

4

5

4

5

L

EMG Out

DC In

DC Out

R

1/Line

2/Line

3/Line

4/Line

+24V-

+24V-

LBB1965

Loop through

Supervision

C

+

Msg Active

Trigger Input

RS232 to LBB1925

Apparatus delivered connected for 230V~

24V

NC

C

NO

1

2

3

4

5

6

7

8

9

10

11

12

230V~ 50/60Hz

NC

NO

LBB 1965/00￿

In

Pilottone

Fault

GND

8900 196 5005

Mains

Trigger Input 1-6

OFF

WK

Out

S/N

Rated Input

ON

Pilot

Message

Warning

Power:50VA

In

Out

1 2 3 4 5 6 7 8

RS232 to PC

To.5L250V

Tone

This apparatus must be earthed

LBB1938

Input 1 Prior ity

Input 1

Input 2

Slave Input

Loopthrough 1

Priority

Enable

100V

Input 2 Program

Loopthrough 2

Direct O utput

Input 1 Prior ity

+

100V

2..24V-Input 1

-

0

0V-Input 2

+

70V

Input 2 Enable

0

2..24V-Enable

-

8ohm

0V-Mute

2..24V GND

2..24V GND 100V 0

Slave Input 100V 100V

100V/70V

0

100V

0

70V

0

8

Default Off

Default On

Input 1-Priority

Input 2-Program

Priority O nly

Priority Controlled O utput

0

No Priority

Priority O nly

No Priority

0

Priority

100V

0

100V

0

Input

Loopthrough

Input

Loopthrough

Warning

This apparatus must be earthed

Figure 3.3

It is possible to connect the LBB1965 message manager between a mixer pre-amplifier and a power amplifier. When the message manager is not active, the mixer pre-amplifier is routed to the power amplifier. However, when the message manager becomes active, this loopthrough connection is interrupted and the message manager is switched to the power amplifier.

Figure 3.3 shows this configuration example in which the Plena Mixer Pre-amplifier LBB1920 is used with a Plena Power Amplifier LBB1938. This is a high priority application, as the message manager has absolute priority.

Bosch Security Systems 2003-09 9922 141 50502en