Bosch DCN Next Generation Installation & User's Instructions page 100

DCN Next Generation | Installation and User Instructions | Central Devices
You can connect microphone sources (refer to table
11.6) only to the XLR plugs of audio input 1 and audio
input 2 of the audio expander.
table 11.6: Audio inputs, microphone signal
Number of connections:
1x XLR socket for each audio input
Location:
Rear side
Cable:
Shielded cable
Nominal level:
Refer to appendix A
Range:
Refer to appendix A
Frequency response:
-3 dB @ 20 Hz and 20 kHz
0 dB @ 100 Hz, 1 kHz and 10 kHz
Impedance:
1360 Ω
Signal-to-noise ratio:
> 62 dBA
CMMR:
• > 55 dB @ 100 Hz
• > 65 dB @ 1 kHz and 10 kHz
Phantom power supply:
12 + 1 V (max. 15 mA)
Use the configuration menu to configure the audio
inputs of he audio expander (refer to section 11.5.8).
Bosch Security Systems | 2007-02 | 9922 141 70525
11.4.4 Audio outputs
You can connect audio recording devices or public
address systems to the audio outputs of the audio
expander. The audio expander has four audio outputs.
Each audio output has (refer to figure 11.6):
• 1 XLR plug for balanced signals. The electric circuits
behind the XLR plugs contain transformers.
• 1 double cinch socket for unbalanced signals
Note
The two cinch sockets contain the same mono
signal.
1 2
Audio Out
3
figure 11.6: Audio output, connection
table 11.7: Audio output, connection
Pin Type Signal
1 XLR Xternal
2 Live
3 Return
4 Cinch Live
5 Return
en | 100
5
4
Description
Shield/ground
Positive
Negative
Signal out
Shield/Ground