Bosch DCN Next Generation Installation And User Instructions Manual page 144

DCN NG | Installation and User Instructions | Section 5 | System Installation
The only difference between the basic system and this
redundant cabled system is the connecting between the
last audio expander (LBB4402/00) and the CCU
(LBB4401/00). The equipment now forms a ring. If a
cable breaks, the optical network remains operational.
When creating a redundant optical network, the total
power consumption of the equipment in the optical
network must be less than 65 W. This is to ensure that
when there is a fault in the network close to the optical
network sockets of the CCU, the other socket can still
feed the entire optical network.
LBB 4402/00
Analogue Audio Expander
figure 27.8: Redundant optical network with tap-off
Bosch Security Systems | 2004-03 | 9922 141 70521en
27.6.4 Tap-offs
The network splitter (LBB4410/00) makes it possible to
create tap-offs (see figure 27.8). Please note that tap-offs
can never be redundant. If the cable between the
network splitter and audio expander C breaks, audio
expander C is not connected to the CCU anymore.
LBB 4100/00(D)
Central Control Unit
C
LBB 4410/00
Network Splitter
LBB 4402/00
Analogue Audio Expander
LBB 4402/00
Analogue Audio Expander
B
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A