Bosch DCN Next Generation Installation And User Instructions Manual page 44

DCN NG | Installation and User Instructions | Section 2 | Interpretation Equipment
The pin header and the solder pads are internally
connected (see table 5.2).
table 5.2: Connecting extra headphones sockets
Pin header Solder pad
1 X18
2 X16
3 X17
Note
The type number of the socket that can be
connected to the pin header is: AMP173977-3.
Note
Connecting headphones to the extra
headphones socket provisions does not mute
the headphones connected to the 3.5 mm jack
socket on top of the channel selector.
Note
The channel selector is automatically
deactivated when the headphones are removed
and the auto stand-by function has been
enabled. (see section 5.5.2).
Bosch Security Systems | 2004-03 | 9922 141 70521en
5.3.5
The reduce level output function is used to avoid
acoustical feedback when the channel selector is used in
Signal combination with a microphone. It is activated by an
Signal left external signal connected to X14 (see figure 5.8 and
Signal right table 5.3)
Common
table 5.3: Reduce output level connector X14
Voltage
< 1 V
> 3 V
figure 5.8: Reduce output level connector
table 5.4: Reduce output level connector
Position
1
2
Connecting the output level
reduction connector
Description
The output level of the channel
selector is not reduced.
The output level of the channel
selector is reduced by an
additional 18 dB.
1 2
Signal
Positive
GND
Note
The type number of the socket that can be
connected to the pin header is: AMP173977-2.
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