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Bosch Security Systems | 2011-02
Praesideo 3.5 | Installation and User Instructions | 7 | System Hardware Installation en | 297
31.5 Maximum cable length
The maximum length of all optical fibers together (both
POF and GOF) in the system depends on the number of
nodes in the system. Each piece of equipment has been
assigned a number of nodes.
The graph (see figure 31.5) shows the relation between
the number of nodes in the system and maximum
optical fiber length in the system.
table 31.2: Nodes
Type no . Description Nodes
LBB4402/00 Audio Expander 1
LBB4404/00 CobraNet Interface 1
PRS-NSP Network Splitter 1
PRS-FIN(S)
PRS-FINNA
Fiber Interface
Fiber Interface
1
0/1
PRS-1P500
PRS-2P250
PRS-4P125
LBB4428/00
Power Amplifier 1x500 W
Power Amplifier 2x250 W
Power Amplifier 4x125 W
Power Amplifier 8x60 W
1
1
1
2
LBB4430/00 Call Station Basic 1
LBB4432/00 Call Station Keypad 0
PRS-CSNKP Numeric Keypad 0
LBB4433/00 Call Station Kit 1
LBB4434/00 Call Station Keypad Kit 0
PRS-CSI Call Station Interface 1
PRS-CRF Call Stacker 1
PRS-16MCI Multi Channel Interface 1
PRS-NCO-B Network Controller 3
Note
A system may not contain more than 63 nodes.
Note
The PRS-FINNA counts as 0 nodes for the
system limit of 63 nodes, but as 1 node for the
maximum optical fiber length. Therefore, the
dashed part of the line is only applicable to
systems with PRS-FINNA Fiber Interfaces.
figure 31.5: Maximum optical fiber length vs. number of nodes
850
1050
115 0
950
750
1250
1350
1450
1550
1650
17 5 0
1850
1950
2050
2150
Maximum cable length (m)
650
5010152025
Number of nodes
30 35 40 45 50 55 60 65 70 75 80