Bosch DCN Next Generation Installation & User's Instructions page 49

DCN Next Generation | Installation and User Instructions | Central Devices
You can select the procedure that is used to send audio
signals through the central control unit with the audio
routing modes (refer to section 8.10.11).
Note
You can only connect line level sources to the
audio inputs of the central control unit. It is not
possible to connect microphone sources.
table 8. 1 4: Audio input details, line level signals
Number of connections:
• 1x XLR socket for each audio input
• 1x double cinch socket for each audio input
Location:
Rear side
Cable:
Shielded cable
Maximum level:
Refer to appendix A
Nominal level:
Refer to appendix A
Frequency response:
-3 dB @ 30 Hz and 20 kHz
Impedance:
• XLR: 22 kΩ
• Cinch: 12 kΩ
Signal-to-noise ratio:
> 85 dBA @ max. level
CMRR:
> 60 dB @ 100 Hz
> 50 dB @ 1 kHz
Crosstalk attenuation:
> 85 dB @ max. level
Distortion:
< 0. 1 % @ 100 Hz @ -3 dB of the max. input
Bosch Security Systems | 2007-02 | 9922 141 70525
8.5.6 Audio outputs
You can connect an audio recording device or a public
address system to the audio outputs of the central
control unit. The central control unit has two audio
outputs. Each audio output has (refer to figure 8.9):
• 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 8.9: Audio output, connection
table 8. 1 5: Audio output, connection
Pin Type Signal
1 XLR Xternal
2 Live
3 Return
4 Cinch Live
5 Return
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5
4
Description
Shield/ground
Positive
Negative
Signal out
Shield/Ground