Tap-Offs; Loop-Throughs - Bosch DCN Next Generation Installation And User Instructions Manual

DCN NG | Installation and User Instructions | Section 5 | System Installation
LBB 4106/00(D)
Trunk Tap-off
In Out Out
LBB 4106/00(D)
Trunk Tap-off
In Out Out
figure 26.2: DCN power supply (2)
26.5.4 Overload indication
Each DCN socket of the CCU (LBB4100/00) and
extension power supply (LBB4106/00) has a red LED
that lights up to indicate power overload situations. An
overload situation occurs when the equipment
connected to the socket asks for more power than can
be supplied or when a short-circuit is detected. Once an
overload situation is detected, the sockets are switched
off. As a result, all units that are connected to the CCU
are deactivated. It takes less than 30 seconds
(LBB4100/00) or 8 seconds (LBB4106/00) before the
socket is checked again.
26.5.5 Extension cables
DCN extension cables (LBB4416/xx) have a direct
influence on the available power. The longer the total
length of extension cable connected to a DCN trunk
socket of a CCU (LBB4100/00) or extension power
supply (LBB4106/00), the fewer power is available for
powering the units connected to that socket. The length
of used extension cables must therefore always be taken
into account (see section 26.8.3).
Bosch Security Systems | 2004-03 | 9922 141 70521en
Out
P < 85 W
Out
P < 255 W
26.6

Tap-offs

Because tap-off sockets regenerate the digital DCN
signal, the number of tap-off sockets connected in series
is limited. The number of serial tap-off connections from
the CCU to the last tap-off in a branch must not
exceed 4.
26.7

Loop-throughs

The maximum number of loop-through connections in
succession is 50. After 50 loop-throughs, the digital
DCN signal must be regenerated. This can be done
using a trunk splitter (LBB4114/00) or tap-off unit
(LBB4115/00).
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