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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 | 10-10
Control Capacity
10.5 Control Capacity
The Central Control Unit LBB 3500/05 has a power handling capacity to power up to 90 DCN units,
while Central Control Units LBB 3500/15 and LBB 3500/35 have a power handling capacity to power
up to 180 DCN units. However, the built-in ‘control facilities’ of all CCUs are capable of controlling up
to a maximum of 240 active units* and an unlimited number of passive units**. A combination of
both active and passive units can be connected to any system ‘tap-off’ or trunk-line outlet connector.
Where more than 240 active units are required, the DCN system can be extended with the Multi-
Central Control unit LBB 3500/35 for use in Multi-CCU systems. In combination with a dedicated PC,
fitted with a Multi-PC- card LBB 3511/00 and Multi-CCU software LBB 3586/00, the PC can control
up to a maximum of 16 CCU’s connected in a 75 ohm coaxial loop-through chain. Each CCU in the
chain has the same Power handling and control capacity as the Extended CCU (LBB 3500/15).
In total, a maximum of 3,840 active units, using sixteen LBB 3500/35 type CCU’s can be controlled.
* Active (contribution) units include:
• LBB 3530/xx, LBB 3531/xx, ...............................................................Delegate discussion units
• LBB 3533/xx, LBB 3534/xx.................................................................Chairman discussion units
• LBB 3544/00, LBB 3545/00, LBB 3546/00, LBB 3547/00 ..Conference units (Concentus)
• LBB 3520/10................................................................................................Interpreter desk
• LBB 3535/00................................................................................................Dual Audio Interface Unit (See Note 1)
• LBB 3540/00................................................................................................Multi-purpose Connection Unit
• LBB 3512/00................................................................................................Data Distribution Board
• LBB 3510/00................................................................................................PC Network Card
• LBB 3513/00................................................................................................Analog Audio Input/Output Module
**Passive (distribution) units include:
• LBB 3524/xx/, LBB 3526/10............................................................Channel Selector Panel (See Note 2)
NOTE 1: The Dual Audio Interface Unit is controlled by the system as a single active unit,
however two microphone inputs can be individually switched on or off. Therefore, when
using the Dual Audio Interface Unit LBB 3535/00, up to a maximum of 480 microphones
can be connected to a single Central Control Unit.
NOTE 2: Up to 10,000 Channel Selector Panels LBB 3524/xx and LBB 3526/xx can be
connected to a single Central Control Unit in combination with Extension power supply
units and/or Audio Media Interface Units to provide the required power.
10.6 Stand-alone Systems
(using Extension cables, Trunk-splitter and Tap-off units)
All DCN system units are connected to the CCU via its three outlet trunk-line cable connectors.
10.6.1 Basic System (without extension units)
FIG 10-13 shows a basic trunk-line interconnection, without extension units.
FIG 10-13 System Interconnection without extension unit
Port 1
Rec.
Line
In
Out
In
Out
Symmetrical
Trunk
115V-T4A 230V -T2A
Port 1
Port 2
Rec.
Line
In
Out
In
Out
Symmetrical
Trunk
115V-T4A 230V -T2A
Central Control Unit
Central Control Unit
LBB 3500/05
LBB 3500/15
≤ 90 PCF (max.)
≤ 180 PCF (max.)