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Bosch Security Systems | 2011-02
Praesideo 3.5 | Installation and User Instructions | 7 | System Hardware Installation en | 296
31.3 Dust caps
Protect the POF parts of the system cables and
connectors that are not in use with dust caps. Dust caps
also block the red light from the fiber optic interface,
which might be visible and disturbing.
31.4 Maximum distance
Due to light loss, the maximum length of POF cabling
(and therefore also system bus cables) between two
pieces of equipment is 50 m. If the distance between two
units is more than 50 m, PRS-FIN(NA) or PRS-FINS
Fiber Interfaces and glass optical fibers (GOF) must be
used (see figure 31.4).
If GOF cables are used, make sure that they:
• are multimode GOF cables (single mode GOF
cables are supported by the PRS-FINS);
• have a maximum attenuation of 2 dB/km;
• are suitable for light with a wavelength of 1300 nm;
• are terminated with standard SC connectors.
Note
During both installation and operation, the
temperature of the POF cabling may not exceed
65 °C. Higher temperatures can damage the
fibers.
Note
The POF part of the system bus connectors on
the Praesideo equipment are F05 and F07
compliant. This means that if only data has to be
transported, industry-standard F05 or F07
connectors can be used. If only POF cabling is
used between two units, no power is
transported between these pieces of
equipment.
figure 31.3: Dus t cap
figure 31.4: Using fiber interfaces
Note
It is also possible to increase the distance
between units above 50 m by inserting
PRS-NSP Network Splitters every 50 m or less.
Although no tap-off may be required, the
network signal is regenerated in the network
splitter to cover another 50 m.
POF
GOF ( > 50m)
POF
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