External Settings And Connections; Connecting The Inputs And The Outputs; Announcement Set-Up - Bosch LBB 1968/00 Manual

Plena Feedback Suppressor | Installation and Operating Manual |
3

External settings and connections

3. 1

Connecting the inputs and the outputs

Figures 3.1 through 3.5 show some different configuration set-ups.

3.1.1 Announcement set-up

See fig. 3.1.
The Plena Feedback Suppressor is provided with two balanced DIN-inputs (2 and 5) to connect one or two
LBB1950 call stations or LBB1949 gooseneck microphones. The signal inputs are parallel to the balanced XLR-
inputs (1 and 4), and the priority contacts are looped through to pins 4 and 5 of the balanced DIN-output (8).
The output level on the DIN-output (8) is optimized for the priority microphone input level of the Plena Mixer
Amplifier range.
• Set the Mic/Line switch (3) to 'Mic'.
• Enable the phantom power supply with the phantom power switch (16).
• If only one call station is used, connect it to the Microphone 1 input (2).
LBB1950
Mic 1/Line In
Mic/Line
1 2 3
L
Tel/Emer.
0
R
CD
0 2
+
3
2
Chime
1 3
4 5
1 2
figure 3. 1 : Announcement set-up
Bosch Security Systems | 2003-11 | 9922 141 81681en
LBB1950
16
Mic 2 In
On Off
Phantom Mic 1+2
4 5
Out
In
Inc
Aux Line Out 1V
GND GND +
1 1 2
Mic/Line Mic/Line
3
3 4
External settings and connections
8
Line
Line Out
In
High Med. Low
Out
Signal Level
1 2 3 4
Line Out
Call/Mix
100/70V/ 8Ω0 100/70 V 0 100/70 V 0 100/70 V 0 100/70 V 0
Switch On Off
1 Music mode Speech mode
115V~ 230V~
2 Dualinputvoicetracking Single input
Mic1In + Mic2In Mic2/Line In
3 Process with bass lift Process flat
4 Accurate mode Fast mode
Apparatus delivered
LBB 1968/00 8900 196 80001
connected for 230V-
Plena Feedback Suppressor
115/230V~,50/60Hz
N663
Rated input
S/N
Design & Quality Power: 50VA
The Netherlands
T500L250V
Warning
This apparatus must be earthed
LBB1914/10
8900 191 21005
Max. output power 180W
Rated input
Rated output power 120W
115/240V~,50/60Hz
power : 400VA
S/N.
Zone 1 Zone 2 Call Only Mix Only 24VDC In
en | 11
LBB1968
LBB1914/10
115V 230V
Apparatus delivered
connected for 230V-
Warning
This apparatus must be earthed