Control input
Connection
1
Audio input 1
2
Audio input 2
3
Audio input 3
4
Audio input 4
5
Audio output 1
6
Audio output 2
7
Audio output 3
8
Audio output 4
Table 6.7: Control inputs, connection
When the circuit that is connected to a control input of an audio input or audio output is open,
the audio input or audio output is enabled. Close the control input to disable the audio input
or audio output.
When an control input is disabled, an X character replaces the VU meter of the corresponding
audio input or audio output on the display.
Control outputs
The audio expander has five control outputs.
C NC NO C NC NO C NC NO C NC NO C NC NO
Control Out
1
2
3
4
5
Figure 6.12: Control outputs, connection
With the control outputs, you can:
–
Send the condition of the audio outputs to external devices (control output 1,2,3 and 4).
–
Send the condition of the connection of the optical network to external devices (control
output 5).
–
When an audio output is assigned to an individual microphone channel, a corresponding
contact can be switched when the level is above threshold. Refer to LBB4402/00 Audio
Expander, page 191 > Table.
Control output
Condition of
C-NO contact
(Normally Open)
C-NC contact
(Normally Closed)
1
Channel attached to
audio input 1
Engaged (contact
closed)
Not engaged (contact
open)
2
Channel attached to
audio input 2
Engaged (contact
closed)
Not engaged (contact
open)
3
Channel attached to
audio input 3
Engaged (contact
closed)
Not engaged (contact
open)
Conference System
Connection | en 119
Bosch Security Systems B.V.
Operation Manual
2013.11 | V2.0 | DCN-NG_OM_V4.x
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