Bosch 3.5 Manuale Utente

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: Dust 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