Bosch DCN Next Generation Installation & User's Instructions page 81

DCN Next Generation | Installation and User Instructions | Central Devices
10.6.2 Connecting back-up power
Connect the back-up supply to the back-up power
connector on the back of the network controller. Refer
to figure 10.3.
Use the connector supplied with the unit. The fuse for
the back-up supply is inside the unit. The back-up
supply input is protected against voltage reversal.
The back-up voltage range is 43 to 56 V. The system
voltage from the system bus is a constant 48 V. The
power supply to the units that receive power from the
system bus is not affected by a changing back-up battery
voltage.
Note
When the network controller has a back-up
power supply connected, the network controller
cannot be switched off just by the mains on/off
switch (9). The battery connection must also be
removed.
Battery 48V
figure 10.3: Back-up power supply
10.6.3 Optical network
Connect the trunk of the optical network to the optical
network sockets of the network controller with optical
network cables.
table 10.4: Optical network connections
Number of connections:
2x proprietary sockets
Location:
Rear side
Nodes:
2
Power supply:
max. 65 W (refer to section 2.5.3.3)
Bosch Security Systems | 2007-02 | 9922 141 70525
4 A
+ 0
10.6.4 Headphones
Refer to section 8.5.4 for information about the
headphones socket of the network controller. The
headphones sockets of the central control unit and the
network controller are the same.
You can select the signal that is available on the
headphones socket with the configuration menu (refer
to section 10.10.9).
10.6.5 Audio inputs
You can connect an external analog audio source to the
audio inputs of the network controller. The network
controller has four audio inputs. Each audio input has
(refer to figure 10.4):
• 1 XLR socket for balanced signals.
• 1 double cinch socket for unbalanced signals.
The electric circuits behind the XLR sockets of audio
input 3 and audio input 4 contain transformers.
Note
The audio inputs change stereo signals in mono
signals.
2 1
Audio In
3
figure 10.4: Audio input, connection
table 10.5: Audio input, connection
Pin Type Signal
1 XLR Xternal
2 Live
3 Return
4 Cinch Live
5 Return
en | 81
5
4
Description
Shield/ground
Positive
Negative
Signal in
Shield/ground