Siemens SIMATIC NET PROFIBUS manual Installation Connecting the optical lines

4 Setting Up 4.4 Installation

4.4 Installation

4.4.1 Connecting the optical lines

J

CH 2

I

J

CH 3

I

Fig. 6. View of the bottom of the module with the optical ports 2 and 3

(device with two optical ports).

Connect the individual modules using a dual-fiber optical fiber line with BFOC/2.5 connectors.

Ensure

–that the end faces of the optical plugs are free of contamination.

–that respectively one optical input a and one optical output J are connected to one another (crossover connection).

The BFOC port sockets which belong to one other are marked on the bottom of the front plate.

–that the optical plugs on the BFOC socket are securely attached (bayonet fastener must be slotted in).

Ensure that there is sufficient strain relief on the optical fiber line, and pay attention to the minimum bend radius.

Seal BFOC sockets which have not been assigned using the sup- plied protective caps (note: an optical port which has not been assigned should be switched to the operating mode ”Line without optical fiber link monitoring“ to avoid a break in the fiber line from being signaled).

Extraneous ambient light can cause interference in the network, especially under very bright conditions. Optical components can be rendered useless if dust infiltrates them.

Please note the maximum length of the optical fiber line and the possible fiber types which are shown in Table 1, p. 6 and in the Technical Data, p. 31.

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