Network Components For A Profibus Subnet - Siemens SIMOTION C 230-2 Operating Instructions Manual

Connecting
6.2 Networking
Segment in subnet
The baud rate determines the cable length of a subnet segment (see the following table).
Table 6-8
With isolated interface
1)
Greater cable lengths
You need to install RS485 repeaters for segments requiring cable lengths longer than the
allowed length. The maximum possible cable length between two RS 485 repeaters corresponds
to the cable length of a segment (see the previous table). You can connect up to nine RS 485
repeaters in series.
Note that an RS 485 repeater must be counted as a subnet node when determining the total
number of nodes to be connected. This is true even if the RS 485 repeater is not assigned its own
PROFIBUS address.
6.2.3

Network components for a PROFIBUS subnet

PROFIBUS cable
We can offer you e.g. the following PROFIBUS cables:
Table 6-9
PROFIBUS cable
PROFIBUS direct-buried cable
PROFIBUS drum cable
Properties of the PROFIBUS cable
The PROFIBUS cable is a two-core, twisted, and shielded cable with the following features:
Table 6-10
Characteristic impedance
Loop resistance
122
Permitted cable lengths of a subnet segment for specific baud rates
Baud rate
9.6 to 187.5 bits/s
500 Kbits/s
1.5 Mbit/s
3 to 12 Mbits/s
PROFIBUS cable
Cables
Properties of the PROFIBUS cable
Features
Max. cable length of a segment (in m)
1000
400
200
100
Article No.
6XV1 830-0EH10
6XV1 830-3FH10
6XV1 830-3EH10
Values
Approx. 135 to 160 Ω (f = 3 to 20 MHz)
≦ 115 Ω/km
Operating Instructions, 11/2022, A5E33441428B
1)
SIMOTION C