Bosch DCN Next Generation Operation Manual page 139

Conference System
Plug (pin)
1
2
3
Table 6.23: External headphones, connection
Notice!
You can connect, for example, an AMP173977-3 socket to the external headphones plug of
the channel selector.
Warning!
When using external sockets of DCN-FCS make sure that all connections are electrically
!
floating. In case any connections are part of an earth loop unexpected system behavior can
occur.
Level reduction plug
When the channel selector is used with a device that has a microphone, acoustic feedback can
occur.Use the level reduction plug to prevent acoustic feedback.
Figure 6.39: Output level plug, connection
Pin
1
2
Table 6.24: Output level plug, connection
Notice!
You can connect, for example, an AMP173977-2 socket to the level reduction plug of the
channel selector.
Connect a voltage to the level reduction plug to decrease the volume level of the signal on the
headphones.
Bosch Security Systems B.V.
Solder pad
X18
X16
X17
1 2
Signal
Positive
GND
Operation Manual
Connection | en
Signal
Left
Right
Common
2013.11 | V2.0 | DCN-NG_OM_V4.x
139