Siemens SIMATIC NET PROFIBUS User Manual

Passive Components for Electrical Networks
7-28
PROFIBUS Networks SIMATIC NET
6GK1970-5CA20-0AA1 Release 2 05/2000
Cable Lengths
The length of the transmission path on fiber-optic cables is not dependent on the
transmission rate.
Each node on the optical PROFIBUS network has repeater functionality so that the
following distance information relates to the distance between two adjacent,
interconnected PROFIBUS nodes in a bus topology.
The maximum cable length between two PROFIBUS nodes depends on the type
of fiber-optic cable used.
Table 7-7 Permitted Cable Lengths in Networks with Integrated Optical Interfaces (Bus
Topology)
Fiber-optic cable
SIMATIC NET
PROFIBUS
Maximum cable
lengths between two
nodes (in m)
For 1 Network (= 32
nodes) (in m)
Plastic fiber-optic,
duplex cord
50 1550
Plastic fiber-optic,
standard cable
50 1550
PCF fiber-optic,
standard cable
300 9300
Table 7-8 Permitted Cable Lengths in an OLM Network
Fiber-optic cable
SIMATIC NET
PROFIBUS
Maximum cable
lengths between two
nodes (in m)
For 1 Network (= 32
nodes) (in m)
Plastic fiber-optic,
duplex cord
50 1550
Plastic fiber-optic,
standard cable
80 2480
PCF fiber-optic,
standard cable
400 12400

Siemens SIMATIC NET PROFIBUS Specifications

General

Brand	Siemens
Model	SIMATIC NET PROFIBUS
Category	Network Hardware
Language	English