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Bosch Security Systems | 04-2003 | 3922 988 43318 en
Digital Congress Network | Installation and Operating Manual | Chapter 10 - Installation Techniques
en | 10-3
Trunk outlets and Tap-offs
10.3 Trunk outlets and Tap-offs
The Extension Power Supply Unit LBB 4106/00, Audio Media Interface Unit LBB 3508/00, Trunk-cable
splitter LBB 4114/00 and Tap-off Unit LBB 4115/00 all have Trunk outlets and Tap-offs. Trunk-outlets
are used for loop-through of the DCN trunk-line, and tap-offs are used for trunk-cable splitting. These
units have regenerative Tap-offs, regenerating the digital DCN signal.
FIG 10-2 shows the Trunk outlets and Tap-offs of the following units:
1. Audio Media Interface Unit LBB 3508/00
2. Extension Power Supply unit LBB 4106/00
3. Trunk-cable splitter LBB 4114/00 and Tap-off unit LBB 4115/00
10.3.1 Tap-off limitations
The number of serial tap-off connections from the CCU to the last tap-off in its chain should not
exceed 4. Any unit connected thereafter will not function. See FIG 10-3.
FIG 10-2 Trunk-outlet and tap-off connections
115V-T4A 230V -T2A
Output 1 Output 2 Output 3 Output 4 Trunk Tap-off
-T2
Trunk
11 5V
-
T4A
230V
Tap-off
In
1
2
3
LBB 3508 Audio Media Interface Unit
LBB 4106/00 Extension Power Supply Unit
Tap-offs
Trunk-outlet
LBB 4114/00 Trunk-cable splitter
LBB 4115/00 Tap-off unit
Tap-offs
Trunk-in
Trunk-out
Trunk-outlet
Tap-offs
