Siemens SIMATIC NET PROFIBUS Provozní pokyny Strana 233

  • Stažení
  • Přidat do mých příruček
  • Tisk
  • Strana
    / 490
  • Tabulka s obsahem
  • ŘEŠENÍ PROBLÉMŮ
  • KNIHY
  • Hodnocené. / 5. Na základě hodnocení zákazníků
Zobrazit stránku 232
Active Components for Optical Networks
8-5
PROFIBUS Networks SIMATIC NET
6GK1970-5CA20-0AA1 Release 2 05/2000
Design
OLMs are available with one or two fiber-optic interfaces for different types of
fiber-optic cable:
S Plastic fiber-optic cable (980/1000 µm) can be used for distances of up to 80 m.
They can be fitted with BFOC connectors on site.
S PCF fiber-optic cables (200/230 µm) can be used for distances up to 400 m.
They are available preassembled with 4 BFOC connectors and a pulling loop.
S Glass-fiber multimode fiber-optic cable (62.5/125 µm) 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.
S Monomode fiber-optic cables (10/125 µm 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.
Zobrazit stránku 232
1 2 ... 228 229 230 231 232 233 234 235 236 237 238 ... 489 490

Komentáře k této Příručce

Žádné komentáře