Bosch 3922 988 43318 User Manual
2
Bosch Security Systems | 04-2003 | 3922 988 43318 en
Digital Congress Network | Installation and Operating Manual | Chapter 10 - Installation Techniques
en | 10-7
Calculating the PCF of a System with respect to cable length
FIG 10-8
Example when calculating the PCF of a system using discussion units
(e.g. LBB 3530/00)
(e.g. LBB 3530/00)
FIG 10-9
Example when calculating the PCF value of a system using Concentus units
(e.g. LBB 3544/00, LBB 3545/00, LBB 3546/00 and LBB 3547/00)
Port 1
Rec.
Line
In
Out
In
Out
Trunk
115 V-T4A 230 V -T2A
1
2
3
Table 10.2:
Trunk_Outlet Total cable
length
PCF Value
(without Ext. cable correction)
(without Ext. cable correction)
PCF Value
(with Ext. cable correction)
(with Ext. cable correction)
1
40 m (131 ft.)
20
24
2
20 m (65.6 ft.)
35
38
3
80 m (26.2 ft.)
15
22
System PCF = 84
SYSTEM USING
DISCUSSION UNITS
DISCUSSION UNITS
10 m (32.8 ft.)
10 m (32.8 ft.)
30 m (98.4 ft.)
10 m (32.8 ft.)
10 m (32.8 ft.)
40 m (131 ft.)
20 m (65.6 ft.)
10 m (32.8 ft.)
20 m (65.6 ft.)
7 units
5 units
5 units
8 units
9 units
8 units
8 units
2 units
6 units
5 units
LBB 3505/05
Port 1
Port 2
Rec.
Line
In
Out
In
Out
Trunk
115 V-T4A 230 V -T2A
1
2
3
Table 10.3:
Trunk_Outlet Total cable
length
PCF Value
(without Ext. cable correction)
(without Ext. cable correction)
PCF Value
(with Ext. cable correction)
(with Ext. cable correction)
1
40 m (131 ft.)
46
55
2
20 m (65.6 ft.)
55
60
3
80 m (26.2 ft.)
35
52
System PCF = 167
SYSTEM USING
CONCENTUS
UNITS
CONCENTUS
UNITS
10 m (32.8 ft.)
10 m (32.8 ft.)
30 m (98.4 ft.)
10 m (32.8 ft.)
10 m (32.8 ft.)
40 m (131 ft.)
20 m (65.6 ft.)
10 m (32.8 ft.)
20 m (65.6 ft.)
7 units
5 units
5 units
5 units
5 units
5 units
6 units
2 units
6 units
5 units
LBB 3500/15, LBB 3500/35