Connect A Microphone Or Line-Level Source - Bosch LBB 1920 Installation And Operating Manual

Plena Universal Pre-amplifier | Installation and Operating Manual |

4.2 Connect a microphone or line-level source

1 -
3
4
5
Figure 4.2
All channels have 3 possible inputs, use one of these inputs to connect a microphone or a line-level source. The
XLR and DIN input are balanced, the stereo Cinch input is unbalanced and converted to mono. If you use an input
make sure that the internal switch settings are correct (refer to §2.2).
Note
If you want to use the priority feature, you must use a microphone or line-level source with a priority contact
on pin 4 and 5 of the 5-pole DIN plug.
Bosch Security Systems | 2003-09 | 3922 988 99482en
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D ir .O
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D ir .O
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D ir .O
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1
5
4
2
1 -
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3
G N D
4
2 -
5 1
3
G N D
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1 -
2
3
1 -
4
1 /L in
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2 /L in
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External settings and connections
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t1
Dir .Ou
t2
Dir .Ou
t3
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t4
1-
3
4 3 Ins /Ca
5 1 sc/E
5 mg ln
2 4
Ins /Ca
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1-
3 + Ins /Ca Ma ste
4 2 - GND sc r Lin
5 1
3 GND
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3
1-
3
1/L ine 4
5
1-
3
2/L ine 4
5
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5
GND
Cinch 180 5-pole DIN
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115 V-
230 V-
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Rate 230 V-
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DC Out
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+24 V-
GND
180 3-pole XLR
en | 13
GND