Segments For Transmission Rates Up To A Maximum Of 500 Kbps - Siemens SIMATIC NET PROFIBUS Owner's Manual

Note
The power supply to terminating resistors must not be interrupted by turning off
the DTE or repeater or by unplugging the bus connector or tap line. If the power
supply to the terminating resistors cannot be guaranteed, the PROFIBUS
terminator must be used.
3.1.1

Segments for Transmission Rates up to a Maximum of 500 Kbps

Transmission Rates up to a Maximum of 500 Kbps
The following maximum segment lengths can be implemented with the SIMATIC
NET PROFIBUS LAN cables:
Table 3-1 Possible Segment Lengths
– FC Standard Cable
Transmission Rate
– FC Robust Cable
in Kbps
– FC FRNC Cable
– FC Food Cable
– FC Underground Cable
– SIENOPYR–FR Marine Cable
9.6
19.2
45.45
93.75
187.5
500
The maximum permitted number of bus attachments (DTEs, repeaters, OLMs,
BT12 M,...) to one segment is 32.
PROFIBUS Networks SIMATIC NET
6GK1970-5CA20-0AA1 Release 2 05/2000
Segment Length for Cable Type
1000 m
1000 m
1000 m
1000 m
1000 m
400 m
Configuring Networks
– FC Trailing Cable
– PROFIBUS Flexible Cable
– PROFIBUS Festoon Cable
900 m
900 m
900 m
900 m
700 m
400 m
3-3