Bosch 3922 988 43318 Manuale Utente
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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 | 10-2
Power Handling Capacity
10.2 Power Handling Capacity
To understand the power handling capacity of a system, individual DCN units have been assigned with
a Power Consumption Factor (PCF). The PCF therefore has a bearing on the total number of units
that can be connected to a system. The maximum number of units, quoted for a CCU is based on all
units having a PCF of 1. This means for example, that a CCU can accommodate 60 units of PCF (valid
for each trunk/tap-off output), but can also accommodate 120 units of PCF 0.5. Table No. 10.1 gives
the PCF value rated for each DCN system unit.
The length of (extension) cable used also has an influence on the number of units connected to a
system. Therefore to calculate the PCF value in relation to the length of cable used, a calculation
graph has been devised
a Power Consumption Factor (PCF). The PCF therefore has a bearing on the total number of units
that can be connected to a system. The maximum number of units, quoted for a CCU is based on all
units having a PCF of 1. This means for example, that a CCU can accommodate 60 units of PCF (valid
for each trunk/tap-off output), but can also accommodate 120 units of PCF 0.5. Table No. 10.1 gives
the PCF value rated for each DCN system unit.
The length of (extension) cable used also has an influence on the number of units connected to a
system. Therefore to calculate the PCF value in relation to the length of cable used, a calculation
graph has been devised
(refer to
shows the maximum PCF values that can be connected to a single and all three trunk-
outlets of the following units:
1. Central Control Unit LBB 3500/..
2. Audio Media Interface unit LBB 3508/00
3. Extension Power Supply Unit LBB 4106/00
1. Central Control Unit LBB 3500/..
2. Audio Media Interface unit LBB 3508/00
3. Extension Power Supply Unit LBB 4106/00
FIG 10-1
Power Handling Capacities
REMINDER:
The Central Control Unit type LBB 3500/05 has a maximum rated PCF
value of 90 PCF. Central control units type LBB 3500/15 and LBB 3500/35 have a
maximum rated PCF value of 180 PCF.
maximum rated PCF value of 180 PCF.
Table 10.1: Power Consumption Factor PCF
Type No.
DCN Unit Description
PCF Value
LBB 3530/xx
Delegate unit (discussion)
1
LBB 3531/xx
Delegate unit (discussion)
1
LBB 3533/xx
Chairman unit (discussion)
1
LBB 3534/xx
Chairman unit (discussion)
1
LBB 3544/00, LBB 3545/00
Delegate unit (Concentus)
2
LBB 3546/00
Delegate unit (Concentus)
2.5
LBB 3547/00
Chairman unit (Concentus)
2.5
LBB 3520/10
Interpreter desk
2.5
LBB 3524/xx
Channel selector unit
0.5
LBB 3526/10
Channel selector unit
0.5
LBB 3535/00*
Dual audio interface unit
1.5
LBB 3540/15
Multi-purpose connection unit
2
LBB 3512/00
Data Distribution Board
1
LBB 4106/00 (D)
Extension Power Supply Unit
0.5
LBB 3508/00 (D)
Audio Media Interface unit
0.5
LBB 3423/00
DCN Interface module
0.5
LBB 3510/00
PC network card
1
LBB 3513/00
Analog Audio Input/Output Module
1
LBB 4114/00
Trunk-cable Splitter
1
LBB 4115/00
Tap-Off unit
1
The PCF value of a unit includes its attached 2 m (6.5 ft.) long cable.
* The PCF value of these units include the flush-mounted units and/or hand microphones
connected to it
* The PCF value of these units include the flush-mounted units and/or hand microphones
connected to it
Port 1
Rec.
Line
In
Out
In
Out
Symmetrical
Trunk
115 V-T4A 230 V -T2A
Port 1
Rec.
Line
In
Out
In
Out
Symmetrical
Trunk
115 V-T4A 230 V -T2A
115 V-T4A 230 V -T2A
Output 1
Output 2
Output 3
Output 4
Trunk
Tap-off
115 V-T4A 230 V -T2A
Output 1
Output 2
Output 3
Output 4
Trunk
Tap-off
Trunk
11 5V-T 4A 2 30V -T2A
Tap-off
In
Trunk
11 5V-T 4A 2 30V -T2A
Tap-off
In
Port 1
Port 2
Rec.
Line
In
Out
In
Out
Symmetrical
Trunk
115 V-T4A 230 V -T2A
LBB 3500/xx Central Control Unit
LBB 3500/05 Central Control Unit
LBB 3500/15 and LBB 3500/35
Central Control Unit
Central Control Unit
LBB 3508/00 Audio Media Interface Unit
PCF =
≤
60 max.
PCF =
≤
60 max.
PCF =
≤
180 max.
PCF =
≤
90 max.
PCF =
≤
90 max.
LBB 4106 Ext. Power Supply Unit
LBB 4106 Ext. Power Supply Unit
PCF =
≤
60 max.
PCF =
≤
180 max.