Siemens SIMATIC NET PROFIBUS manual Design

Active Components for Optical Networks

Design

OLMs are available with one or two fiber-optic interfaces for different types of fiber-optic cable:

SPlastic fiber-optic cable (980/1000 ∝ m) can be used for distances of up to 80 m. They can be fitted with BFOC connectors on site.

SPCF fiber-optic cables (200/230 ∝ m) can be used for distances up to 400 m. They are available preassembled with 4 BFOC connectors and a pulling loop.

SGlass-fiber multimode fiber-optic cable (62.5/125 ∝ m) such as the SIMATIC NET fiber-optic cables can be used to span distances up to 3000 m. They must be ordered preassembled with 4 BFOC connectors and are tested before they are supplied.

SMonomode fiber-optic cables (10/125 ∝ m fibers) can be used for extremely long distances of up to 15 km. These are available on request.

OLMs can be combined via an RS-485 interface and individual nodes or entire electrical segments can be included in the PROFIBUS network.

The version 3 OLMs support all PROFIBUS transmission rates up to 12 Mbps.

They have a compact metal casing. They are suitable for installation on a DIN rail or for fixed mounting. When installed vertically, OLMs can be placed side-by-side needing gaps between them.

PROFIBUS Networks SIMATIC NET	8-5
6GK1970-5CA20-0AA1 Release 2 05/2000